Fix conflicts

@@ -22,37 +22,37 @@ BEGIN
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_device_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_device_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                             OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(device.id) as entity_id FROM device WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT device.id as entity_id FROM device WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_asset_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_asset_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                            OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(asset.id) as entity_id FROM asset WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT asset.id as entity_id FROM asset WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_customer_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_customer_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                               OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(customer.id) as entity_id FROM customer WHERE tenant_id = %L and id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT customer.id as entity_id FROM customer WHERE tenant_id = %L and id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid varchar(31),
+CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid uuid,
                                                       IN system_ttl bigint, INOUT deleted bigint)
     LANGUAGE plpgsql AS
 $$

+--
+-- Copyright © 2016-2020 The Thingsboard Authors
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+
+CREATE OR REPLACE FUNCTION extract_ts(uuid UUID) RETURNS BIGINT AS
+$$
+DECLARE
+    bytes bytea;
+BEGIN
+    bytes := uuid_send(uuid);
+    RETURN
+                (
+                            (
+                                            (get_byte(bytes, 0)::bigint << 24) |
+                                            (get_byte(bytes, 1)::bigint << 16) |
+                                            (get_byte(bytes, 2)::bigint <<  8) |
+                                            (get_byte(bytes, 3)::bigint <<  0)
+                                ) + (
+                                    ((get_byte(bytes, 4)::bigint << 8 |
+                                      get_byte(bytes, 5)::bigint)) << 32
+                                ) + (
+                                    (((get_byte(bytes, 6)::bigint & 15) << 8 | get_byte(bytes, 7)::bigint) & 4095) << 48
+                                ) - 122192928000000000
+                    ) / 10000::double precision
+        ;
+END
+$$ LANGUAGE plpgsql
+    IMMUTABLE PARALLEL SAFE
+    RETURNS NULL ON NULL INPUT;

@@ -15,10 +15,14 @@
  */
 package org.thingsboard.server.service.subscription;
 
+import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.MoreExecutors;
 import lombok.extern.slf4j.Slf4j;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.context.event.EventListener;
 import org.springframework.stereotype.Service;
@@ -33,6 +37,8 @@ import org.thingsboard.server.common.data.kv.TsKvEntry;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.query.EntityData;
 import org.thingsboard.server.common.data.query.EntityDataQuery;
+import org.thingsboard.server.common.data.query.EntityKey;
+import org.thingsboard.server.common.data.query.EntityKeyType;
 import org.thingsboard.server.common.data.query.TsValue;
 import org.thingsboard.server.common.msg.queue.ServiceType;
 import org.thingsboard.server.common.msg.queue.TbCallback;
@@ -53,6 +59,7 @@ import org.thingsboard.server.service.telemetry.cmd.v2.EntityDataUpdate;
 import org.thingsboard.server.service.telemetry.cmd.v2.EntityHistoryCmd;
 import org.thingsboard.server.service.telemetry.cmd.v2.LatestValueCmd;
 import org.thingsboard.server.service.telemetry.cmd.v2.TimeSeriesCmd;
+import org.thingsboard.server.service.telemetry.sub.SubscriptionErrorCode;
 import org.thingsboard.server.service.telemetry.sub.SubscriptionUpdate;
 
 import javax.annotation.PostConstruct;
@@ -60,6 +67,7 @@ import javax.annotation.PreDestroy;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -67,7 +75,6 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.function.Function;
 import java.util.stream.Collectors;
 
 @Slf4j
@@ -101,11 +108,16 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
     @Autowired
     private TimeseriesService tsService;
 
+    @Value("${database.ts.type}")
+    private String databaseTsType;
+
     private ExecutorService wsCallBackExecutor;
+    private boolean tsInSqlDB;
 
     @PostConstruct
     public void initExecutor() {
         wsCallBackExecutor = Executors.newSingleThreadExecutor(ThingsBoardThreadFactory.forName("ws-entity-sub-callback"));
+        tsInSqlDB = databaseTsType.equalsIgnoreCase("sql") || databaseTsType.equalsIgnoreCase("timescale");
     }
 
     @PreDestroy
@@ -156,7 +168,70 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
     }
 
     private void handleLatestCmd(TelemetryWebSocketSessionRef session, int cmdId, EntityDataQuery query, LatestValueCmd latestCmd) {
+        TenantId tenantId = session.getSecurityCtx().getTenantId();
+        CustomerId customerId = session.getSecurityCtx().getCustomerId();
+        //Step 1. Update existing query with the contents of LatestValueCmd
+        latestCmd.getKeys().forEach(key -> {
+            if (!query.getLatestValues().contains(key)) {
+                query.getLatestValues().add(key);
+            }
+        });
+
+        //Step 2. Fetch the initial data
+        PageData<EntityData> data = entityService.findEntityDataByQuery(tenantId, customerId, query);
+
+        //Step 3. Fetch the latest values for telemetry keys (in case they are not copied from NoSQL to SQL DB in hybrid mode.
+        if (!tsInSqlDB) {
+            List<String> allTsKeys = latestCmd.getKeys().stream()
+                    .filter(key -> key.getType().equals(EntityKeyType.TIME_SERIES))
+                    .map(EntityKey::getKey).collect(Collectors.toList());
+
+            Map<EntityData, ListenableFuture<Map<String, TsValue>>> missingTelemetryFurutes = new HashMap<>();
+            for (EntityData entityData : data.getData()) {
+                Map<EntityKeyType, Map<String, TsValue>> latestEntityData = entityData.getLatest();
+                Map<String, TsValue> tsEntityData = latestEntityData.get(EntityKeyType.TIME_SERIES);
+                Set<String> missingTsKeys = new LinkedHashSet<>(allTsKeys);
+                if (tsEntityData != null) {
+                    missingTsKeys.removeAll(tsEntityData.keySet());
+                } else {
+                    tsEntityData = new HashMap<>();
+                    latestEntityData.put(EntityKeyType.TIME_SERIES, tsEntityData);
+                }
+
+                ListenableFuture<List<TsKvEntry>> missingTsData = tsService.findLatest(tenantId, entityData.getEntityId(), missingTsKeys);
+                missingTelemetryFurutes.put(entityData, Futures.transform(missingTsData, this::toTsValue, MoreExecutors.directExecutor()));
+            }
+            Futures.addCallback(Futures.allAsList(missingTelemetryFurutes.values()), new FutureCallback<List<Map<String, TsValue>>>() {
+                @Override
+                public void onSuccess(@Nullable List<Map<String, TsValue>> result) {
+                    missingTelemetryFurutes.forEach((key, value) -> {
+                        try {
+                            key.getLatest().get(EntityKeyType.TIME_SERIES).putAll(value.get());
+                        } catch (InterruptedException | ExecutionException e) {
+                            log.warn("[{}][{}] Failed to lookup latest telemetry: {}:{}", session.getSessionId(), cmdId, key.getEntityId(), allTsKeys, e);
+                        }
+                    });
+                    EntityDataUpdate update = new EntityDataUpdate(cmdId, data, null);
+                    wsService.sendWsMsg(session.getSessionId(), update);
+                    //TODO: create context for this (session, cmdId) that contains query, latestCmd and update. Subscribe + periodic updates.
+                }
+
+                @Override
+                public void onFailure(Throwable t) {
+                    log.warn("[{}][{}] Failed to process websocket command: {}:{}", session.getSessionId(), cmdId, query, latestCmd, t);
+                    wsService.sendWsMsg(session.getSessionId(),
+                            new EntityDataUpdate(cmdId, SubscriptionErrorCode.INTERNAL_ERROR.getCode(), "Failed to process websocket command!"));
+                }
+            }, wsCallBackExecutor);
+        } else {
+            EntityDataUpdate update = new EntityDataUpdate(cmdId, data, null);
+            wsService.sendWsMsg(session.getSessionId(), update);
+            //TODO: create context for this (session, cmdId) that contains query, latestCmd and update. Subscribe + periodic updates.
+        }
+    }
 
+    private Map<String, TsValue> toTsValue(List<TsKvEntry> data) {
+        return data.stream().collect(Collectors.toMap(TsKvEntry::getKey, value -> new TsValue(value.getTs(), value.getValueAsString())));
     }
 
     private void handleHistoryCmd(TelemetryWebSocketSessionRef session, int cmdId, EntityDataQuery query, EntityHistoryCmd historyCmd) {
@@ -181,6 +256,8 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
                     keyData.forEach((k, v) -> entityData.getTimeseries().put(k, v.toArray(new TsValue[v.size()])));
                 } catch (InterruptedException | ExecutionException e) {
                     log.warn("[{}][{}][{}] Failed to fetch historical data", session.getSessionId(), cmdId, entityData.getEntityId(), e);
+                    wsService.sendWsMsg(session.getSessionId(),
+                            new EntityDataUpdate(cmdId, SubscriptionErrorCode.INTERNAL_ERROR.getCode(), "Failed to fetch historical data!"));
                 }
             });
             EntityDataUpdate update = new EntityDataUpdate(cmdId, data, null);

@@ -15,18 +15,30 @@
  */
 package org.thingsboard.server.service.telemetry.cmd.v2;
 
+import lombok.AllArgsConstructor;
 import lombok.Data;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.query.EntityData;
+import org.thingsboard.server.service.telemetry.sub.SubscriptionErrorCode;
 
 import java.util.List;
 
 @Data
+@AllArgsConstructor
 public class EntityDataUpdate {
 
     private final int cmdId;
     private final PageData<EntityData> data;
     private final List<EntityData> update;
-    private int errorCode;
-    private String errorMsg;
+    private final int errorCode;
+    private final String errorMsg;
+
+    public EntityDataUpdate(int cmdId, PageData<EntityData> data, List<EntityData> update) {
+        this(cmdId, data, update, SubscriptionErrorCode.NO_ERROR.getCode(), null);
+    }
+
+    public EntityDataUpdate(int cmdId, int errorCode, String errorMsg) {
+        this(cmdId, null, null, errorCode, errorMsg);
+    }
+
 }

@@ -35,7 +35,7 @@ public class PsqlTimeseriesCleanUpService extends AbstractTimeseriesCleanUpServi
     protected void doCleanUp(Connection connection) {
             long totalPartitionsRemoved = executeQuery(connection, "call drop_partitions_by_max_ttl('" + partitionType + "'," + systemTtl + ", 0);");
             log.info("Total partitions removed by TTL: [{}]", totalPartitionsRemoved);
-            long totalEntitiesTelemetryRemoved = executeQuery(connection, "call cleanup_timeseries_by_ttl('" + ModelConstants.NULL_UUID_STR + "'," + systemTtl + ", 0);");
+            long totalEntitiesTelemetryRemoved = executeQuery(connection, "call cleanup_timeseries_by_ttl('" + ModelConstants.NULL_UUID + "'," + systemTtl + ", 0);");
             log.info("Total telemetry removed stats by TTL for entities: [{}]", totalEntitiesTelemetryRemoved);
     }
 }
\ No newline at end of file

@@ -29,7 +29,7 @@ public class TimescaleTimeseriesCleanUpService extends AbstractTimeseriesCleanUp
 
     @Override
     protected void doCleanUp(Connection connection) {
-        long totalEntitiesTelemetryRemoved = executeQuery(connection, "call cleanup_timeseries_by_ttl('" + ModelConstants.NULL_UUID_STR + "'," + systemTtl + ", 0);");
+        long totalEntitiesTelemetryRemoved = executeQuery(connection, "call cleanup_timeseries_by_ttl('" + ModelConstants.NULL_UUID + "'," + systemTtl + ", 0);");
         log.info("Total telemetry removed stats by TTL for entities: [{}]", totalEntitiesTelemetryRemoved);
     }
 }
\ No newline at end of file

@@ -18,6 +18,7 @@ package org.thingsboard.server.controller;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.thingsboard.server.common.data.Device;
@@ -32,6 +33,8 @@ import org.thingsboard.server.common.data.query.DeviceTypeFilter;
 import org.thingsboard.server.common.data.query.EntityData;
 import org.thingsboard.server.common.data.query.EntityDataPageLink;
 import org.thingsboard.server.common.data.query.EntityDataQuery;
+import org.thingsboard.server.common.data.query.EntityKey;
+import org.thingsboard.server.common.data.query.EntityKeyType;
 import org.thingsboard.server.common.data.query.TsValue;
 import org.thingsboard.server.common.data.security.Authority;
 import org.thingsboard.server.dao.timeseries.TimeseriesService;
@@ -39,6 +42,7 @@ import org.thingsboard.server.service.telemetry.cmd.TelemetryPluginCmdsWrapper;
 import org.thingsboard.server.service.telemetry.cmd.v2.EntityDataCmd;
 import org.thingsboard.server.service.telemetry.cmd.v2.EntityDataUpdate;
 import org.thingsboard.server.service.telemetry.cmd.v2.EntityHistoryCmd;
+import org.thingsboard.server.service.telemetry.cmd.v2.LatestValueCmd;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -142,4 +146,58 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
         Assert.assertEquals(new TsValue(dataPoint3.getTs(), dataPoint3.getValueAsString()), tsArray[2]);
     }
 
+    @Test
+    @Ignore
+    public void testEntityDataLatestWsCmd() throws Exception {
+        Device device = new Device();
+        device.setName("Device");
+        device.setType("default");
+        device.setLabel("testLabel" + (int) (Math.random() * 1000));
+        device = doPost("/api/device", device, Device.class);
+
+        long now = System.currentTimeMillis();
+
+        DeviceTypeFilter dtf = new DeviceTypeFilter();
+        dtf.setDeviceNameFilter("D");
+        dtf.setDeviceType("default");
+        EntityDataQuery edq = new EntityDataQuery(dtf, new EntityDataPageLink(1, 0, null, null), Collections.emptyList(), Collections.emptyList(), Collections.emptyList());
+
+        LatestValueCmd latestCmd = new LatestValueCmd();
+        latestCmd.setKeys(Collections.singletonList(new EntityKey(EntityKeyType.TIME_SERIES, "temperature")));
+        EntityDataCmd cmd = new EntityDataCmd(1, edq, null, latestCmd, null);
+
+        TelemetryPluginCmdsWrapper wrapper = new TelemetryPluginCmdsWrapper();
+        wrapper.setEntityDataCmds(Collections.singletonList(cmd));
+
+        wsClient.send(mapper.writeValueAsString(wrapper));
+        String msg = wsClient.waitForReply();
+        EntityDataUpdate update = mapper.readValue(msg, EntityDataUpdate.class);
+        Assert.assertEquals(1, update.getCmdId());
+        PageData<EntityData> pageData = update.getData();
+        Assert.assertNotNull(pageData);
+        Assert.assertEquals(1, pageData.getData().size());
+        Assert.assertEquals(device.getId(), pageData.getData().get(0).getEntityId());
+        Assert.assertNull(pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature"));
+
+        TsKvEntry dataPoint1 = new BasicTsKvEntry(now - TimeUnit.MINUTES.toMillis(1), new LongDataEntry("temperature", 42L));
+        tsService.save(device.getTenantId(), device.getId(), Arrays.asList(dataPoint1), 0).get();
+
+        cmd = new EntityDataCmd(2, edq, null, latestCmd, null);
+
+        wrapper = new TelemetryPluginCmdsWrapper();
+        wrapper.setEntityDataCmds(Collections.singletonList(cmd));
+
+        wsClient.send(mapper.writeValueAsString(wrapper));
+        msg = wsClient.waitForReply();
+        update = mapper.readValue(msg, EntityDataUpdate.class);
+        Assert.assertEquals(2, update.getCmdId());
+        pageData = update.getData();
+        Assert.assertNotNull(pageData);
+        Assert.assertEquals(1, pageData.getData().size());
+        Assert.assertEquals(device.getId(), pageData.getData().get(0).getEntityId());
+        Assert.assertNotNull(pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES));
+        TsValue tsValue = pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature");
+        Assert.assertEquals(new TsValue(dataPoint1.getTs(), dataPoint1.getValueAsString()), tsValue);
+    }
+
 }

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.controller.sql;
 
-import org.thingsboard.server.controller.BaseEntityQueryControllerTest;
 import org.thingsboard.server.controller.BaseWebsocketApiTest;
 import org.thingsboard.server.dao.service.DaoSqlTest;
 

@@ -15,16 +15,8 @@
  */
 package org.thingsboard.server.common.data.page;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonIgnore;
-import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.Data;
-import lombok.Getter;
-import lombok.ToString;
-
-import java.io.Serializable;
-import java.util.Arrays;
-import java.util.UUID;
 
 @Data
 public class TimePageLink extends PageLink {

@@ -21,8 +21,11 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.runners.MockitoJUnitRunner;
 
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Random;
 import java.util.UUID;
+import java.util.stream.Collectors;
 
 /**
  * Created by ashvayka on 14.07.17.
@@ -37,6 +40,18 @@ public class UUIDConverterTest {
         Assert.assertEquals("1d8eebc58e0a7d796690800200c9a66", result);
     }
 
+
+    @Test
+    public void basicUuid() {
+        System.out.println(UUIDConverter.fromString("1e746126eaaefa6a91992ebcb67fe33"));
+    }
+
+    @Test
+    public void basicUuidConversion() {
+        UUID original = UUID.fromString("3dd11790-abf2-11ea-b151-83a091b9d4cc");
+        Assert.assertEquals(Uuids.unixTimestamp(original), 1591886749577L);
+    }
+
     @Test
     public void basicStringToUUIDTest() {
         UUID result = UUIDConverter.fromString("1d8eebc58e0a7d796690800200c9a66");

@@ -27,7 +27,13 @@ import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.page.SortOrder;
 import org.thingsboard.server.dao.model.ToData;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
 
 public abstract class DaoUtil {
 
@@ -77,9 +83,6 @@ public abstract class DaoUtil {
             if (columnMap.containsKey(property)) {
                 property = columnMap.get(property);
             }
-            if (property.equals("createdTime")) {
-                property = "id";
-            }
             return Sort.by(Sort.Direction.fromString(sortOrder.getDirection().name()), property);
         }
     }

@@ -24,7 +24,6 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.UUID;
 
 /**

@@ -29,12 +29,12 @@ import org.springframework.util.StringUtils;
 import org.thingsboard.common.util.ThingsBoardThreadFactory;
 import org.thingsboard.server.common.data.Tenant;
 import org.thingsboard.server.common.data.alarm.Alarm;
-import org.thingsboard.server.common.data.id.AlarmId;
 import org.thingsboard.server.common.data.alarm.AlarmInfo;
 import org.thingsboard.server.common.data.alarm.AlarmQuery;
 import org.thingsboard.server.common.data.alarm.AlarmSearchStatus;
 import org.thingsboard.server.common.data.alarm.AlarmSeverity;
 import org.thingsboard.server.common.data.alarm.AlarmStatus;
+import org.thingsboard.server.common.data.id.AlarmId;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;

@@ -28,7 +28,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Service;
 import org.springframework.util.StringUtils;
-import org.thingsboard.server.common.data.BaseData;
 import org.thingsboard.server.common.data.EntityType;
 import org.thingsboard.server.common.data.HasName;
 import org.thingsboard.server.common.data.audit.ActionStatus;
@@ -38,7 +37,6 @@ import org.thingsboard.server.common.data.id.AuditLogId;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
-import org.thingsboard.server.common.data.id.UUIDBased;
 import org.thingsboard.server.common.data.id.UserId;
 import org.thingsboard.server.common.data.kv.AttributeKvEntry;
 import org.thingsboard.server.common.data.page.PageData;

@@ -18,14 +18,12 @@ package org.thingsboard.server.dao.audit;
 import com.google.common.util.concurrent.ListenableFuture;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Service;
-import org.thingsboard.server.common.data.BaseData;
 import org.thingsboard.server.common.data.HasName;
 import org.thingsboard.server.common.data.audit.ActionType;
 import org.thingsboard.server.common.data.audit.AuditLog;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
-import org.thingsboard.server.common.data.id.UUIDBased;
 import org.thingsboard.server.common.data.id.UserId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.TimePageLink;

@@ -37,7 +37,6 @@ import org.thingsboard.server.dao.exception.IncorrectParameterException;
 import org.thingsboard.server.dao.service.DataValidator;
 import org.thingsboard.server.dao.service.Validator;
 
-import java.util.List;
 import java.util.Optional;
 
 /**

@@ -24,7 +24,6 @@ import org.thingsboard.server.common.data.plugin.ComponentScope;
 import org.thingsboard.server.common.data.plugin.ComponentType;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.Optional;
 
 /**

@@ -21,7 +21,6 @@ import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 

@@ -42,7 +42,6 @@ import org.thingsboard.server.dao.tenant.TenantDao;
 import org.thingsboard.server.dao.user.UserService;
 
 import java.io.IOException;
-import java.util.List;
 import java.util.Optional;
 
 import static org.thingsboard.server.dao.service.Validator.validateId;

@@ -15,14 +15,11 @@
  */
 package org.thingsboard.server.dao.dashboard;
 
-import com.google.common.util.concurrent.ListenableFuture;
 import org.thingsboard.server.common.data.DashboardInfo;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
-import org.thingsboard.server.common.data.page.TimePageLink;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.UUID;
 
 /**

@@ -29,7 +29,12 @@ import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.cache.annotation.Caching;
 import org.springframework.stereotype.Service;
-import org.thingsboard.server.common.data.*;
+import org.thingsboard.server.common.data.Customer;
+import org.thingsboard.server.common.data.EntitySubtype;
+import org.thingsboard.server.common.data.EntityType;
+import org.thingsboard.server.common.data.EntityView;
+import org.thingsboard.server.common.data.EntityViewInfo;
+import org.thingsboard.server.common.data.Tenant;
 import org.thingsboard.server.common.data.entityview.EntityViewSearchQuery;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.EntityId;

@@ -23,4 +23,8 @@ public interface BaseEntity<D> extends ToData<D> {
 
     void setUuid(UUID id);
 
+    long getCreatedTime();
+
+    void setCreatedTime(long createdTime);
+
 }

@@ -16,7 +16,6 @@
 package org.thingsboard.server.dao.model;
 
 import lombok.Data;
-import org.thingsboard.server.common.data.UUIDConverter;
 
 import javax.persistence.Column;
 import javax.persistence.Id;
@@ -31,28 +30,30 @@ import java.util.UUID;
 public abstract class BaseSqlEntity<D> implements BaseEntity<D> {
 
     @Id
-    @Column(name = ModelConstants.ID_PROPERTY)
-    protected String id;
+    @Column(name = ModelConstants.ID_PROPERTY, columnDefinition = "uuid")
+    protected UUID id;
+
+    @Column(name = ModelConstants.CREATED_TIME_PROPERTY)
+    protected long createdTime;
 
     @Override
     public UUID getUuid() {
-        if (id == null) {
-            return null;
-        }
-        return UUIDConverter.fromString(id);
+        return id;
     }
 
     @Override
     public void setUuid(UUID id) {
-        this.id = UUIDConverter.fromTimeUUID(id);
+        this.id = id;
     }
 
-    protected UUID toUUID(String src){
-        return UUIDConverter.fromString(src);
+    @Override
+    public long getCreatedTime() {
+        return createdTime;
     }
 
-    protected String toString(UUID timeUUID){
-        return UUIDConverter.fromTimeUUID(timeUUID);
+    public void setCreatedTime(long createdTime) {
+        if (createdTime > 0) {
+            this.createdTime = createdTime;
+        }
     }
-
 }

@@ -17,7 +17,6 @@ package org.thingsboard.server.dao.model;
 
 import com.datastax.oss.driver.api.core.uuid.Uuids;
 import org.apache.commons.lang3.ArrayUtils;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.kv.Aggregation;
 
@@ -29,7 +28,6 @@ public class ModelConstants {
     }
 
     public static final UUID NULL_UUID = Uuids.startOf(0);
-    public static final String NULL_UUID_STR = UUIDConverter.fromTimeUUID(NULL_UUID);
     public static final TenantId SYSTEM_TENANT = new TenantId(ModelConstants.NULL_UUID);
 
     // this is the difference between midnight October 15, 1582 UTC and midnight January 1, 1970 UTC as 100 nanosecond units
@@ -39,6 +37,7 @@ public class ModelConstants {
      * Generic constants.
      */
     public static final String ID_PROPERTY = "id";
+    public static final String CREATED_TIME_PROPERTY = "created_time";
     public static final String USER_ID_PROPERTY = "user_id";
     public static final String TENANT_ID_PROPERTY = "tenant_id";
     public static final String CUSTOMER_ID_PROPERTY = "customer_id";

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -24,11 +23,10 @@ import org.hibernate.annotations.TypeDef;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.StringUtils;
 import org.thingsboard.server.common.data.EntityType;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.alarm.Alarm;
-import org.thingsboard.server.common.data.id.AlarmId;
 import org.thingsboard.server.common.data.alarm.AlarmSeverity;
 import org.thingsboard.server.common.data.alarm.AlarmStatus;
+import org.thingsboard.server.common.data.id.AlarmId;
 import org.thingsboard.server.common.data.id.EntityIdFactory;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.dao.model.BaseEntity;
@@ -42,6 +40,7 @@ import javax.persistence.Enumerated;
 import javax.persistence.MappedSuperclass;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.UUID;
 
 import static org.thingsboard.server.dao.model.ModelConstants.ALARM_ACK_TS_PROPERTY;
 import static org.thingsboard.server.dao.model.ModelConstants.ALARM_CLEAR_TS_PROPERTY;
@@ -63,10 +62,10 @@ import static org.thingsboard.server.dao.model.ModelConstants.ALARM_TYPE_PROPERT
 public abstract class AbstractAlarmEntity<T extends Alarm> extends BaseSqlEntity<T> implements BaseEntity<T> {
 
     @Column(name = ALARM_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ALARM_ORIGINATOR_ID_PROPERTY)
-    private String originatorId;
+    private UUID originatorId;
 
     @Column(name = ALARM_ORIGINATOR_TYPE_PROPERTY)
     private EntityType originatorType;
@@ -110,13 +109,14 @@ public abstract class AbstractAlarmEntity<T extends Alarm> extends BaseSqlEntity
 
     public AbstractAlarmEntity(Alarm alarm) {
         if (alarm.getId() != null) {
-            this.setUuid(alarm.getId().getId());
+            this.setUuid(alarm.getUuidId());
         }
+        this.setCreatedTime(alarm.getCreatedTime());
         if (alarm.getTenantId() != null) {
-            this.tenantId = UUIDConverter.fromTimeUUID(alarm.getTenantId().getId());
+            this.tenantId = alarm.getTenantId().getId();
         }
         this.type = alarm.getType();
-        this.originatorId = UUIDConverter.fromTimeUUID(alarm.getOriginator().getId());
+        this.originatorId = alarm.getOriginator().getId();
         this.originatorType = alarm.getOriginator().getEntityType();
         this.type = alarm.getType();
         this.severity = alarm.getSeverity();
@@ -153,12 +153,12 @@ public abstract class AbstractAlarmEntity<T extends Alarm> extends BaseSqlEntity
     }
 
     protected Alarm toAlarm() {
-        Alarm alarm = new Alarm(new AlarmId(UUIDConverter.fromString(id)));
-        alarm.setCreatedTime(Uuids.unixTimestamp(UUIDConverter.fromString(id)));
+        Alarm alarm = new Alarm(new AlarmId(id));
+        alarm.setCreatedTime(createdTime);
         if (tenantId != null) {
-            alarm.setTenantId(new TenantId(UUIDConverter.fromString(tenantId)));
+            alarm.setTenantId(new TenantId(tenantId));
         }
-        alarm.setOriginator(EntityIdFactory.getByTypeAndUuid(originatorType, UUIDConverter.fromString(originatorId)));
+        alarm.setOriginator(EntityIdFactory.getByTypeAndUuid(originatorType, originatorId));
         alarm.setType(type);
         alarm.setSeverity(severity);
         alarm.setStatus(status);

@@ -15,13 +15,11 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import org.hibernate.annotations.Type;
 import org.hibernate.annotations.TypeDef;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.asset.Asset;
 import org.thingsboard.server.common.data.id.AssetId;
 import org.thingsboard.server.common.data.id.CustomerId;
@@ -33,6 +31,7 @@ import org.thingsboard.server.dao.util.mapping.JsonStringType;
 
 import javax.persistence.Column;
 import javax.persistence.MappedSuperclass;
+import java.util.UUID;
 
 import static org.thingsboard.server.dao.model.ModelConstants.ASSET_CUSTOMER_ID_PROPERTY;
 import static org.thingsboard.server.dao.model.ModelConstants.ASSET_LABEL_PROPERTY;
@@ -48,10 +47,10 @@ import static org.thingsboard.server.dao.model.ModelConstants.SEARCH_TEXT_PROPER
 public abstract class AbstractAssetEntity<T extends Asset> extends BaseSqlEntity<T> implements SearchTextEntity<T> {
 
     @Column(name = ASSET_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ASSET_CUSTOMER_ID_PROPERTY)
-    private String customerId;
+    private UUID customerId;
 
     @Column(name = ASSET_NAME_PROPERTY)
     private String name;
@@ -77,11 +76,12 @@ public abstract class AbstractAssetEntity<T extends Asset> extends BaseSqlEntity
         if (asset.getId() != null) {
             this.setUuid(asset.getId().getId());
         }
+        this.setCreatedTime(asset.getCreatedTime());
         if (asset.getTenantId() != null) {
-            this.tenantId = UUIDConverter.fromTimeUUID(asset.getTenantId().getId());
+            this.tenantId = asset.getTenantId().getId();
         }
         if (asset.getCustomerId() != null) {
-            this.customerId = UUIDConverter.fromTimeUUID(asset.getCustomerId().getId());
+            this.customerId = asset.getCustomerId().getId();
         }
         this.name = asset.getName();
         this.type = asset.getType();
@@ -91,6 +91,7 @@ public abstract class AbstractAssetEntity<T extends Asset> extends BaseSqlEntity
 
     public AbstractAssetEntity(AssetEntity assetEntity) {
         this.setId(assetEntity.getId());
+        this.setCreatedTime(assetEntity.getCreatedTime());
         this.tenantId = assetEntity.getTenantId();
         this.customerId = assetEntity.getCustomerId();
         this.type = assetEntity.getType();
@@ -115,13 +116,13 @@ public abstract class AbstractAssetEntity<T extends Asset> extends BaseSqlEntity
     }
 
     protected Asset toAsset() {
-        Asset asset = new Asset(new AssetId(UUIDConverter.fromString(id)));
-        asset.setCreatedTime(Uuids.unixTimestamp(UUIDConverter.fromString(id)));
+        Asset asset = new Asset(new AssetId(id));
+        asset.setCreatedTime(createdTime);
         if (tenantId != null) {
-            asset.setTenantId(new TenantId(UUIDConverter.fromString(tenantId)));
+            asset.setTenantId(new TenantId(tenantId));
         }
         if (customerId != null) {
-            asset.setCustomerId(new CustomerId(UUIDConverter.fromString(customerId)));
+            asset.setCustomerId(new CustomerId(customerId));
         }
         asset.setName(name);
         asset.setType(type);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -32,6 +31,7 @@ import org.thingsboard.server.dao.util.mapping.JsonStringType;
 
 import javax.persistence.Column;
 import javax.persistence.MappedSuperclass;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -39,11 +39,11 @@ import javax.persistence.MappedSuperclass;
 @MappedSuperclass
 public abstract class AbstractDeviceEntity<T extends Device> extends BaseSqlEntity<T> implements SearchTextEntity<T> {
 
-    @Column(name = ModelConstants.DEVICE_TENANT_ID_PROPERTY)
-    private String tenantId;
+    @Column(name = ModelConstants.DEVICE_TENANT_ID_PROPERTY, columnDefinition = "uuid")
+    private UUID tenantId;
 
-    @Column(name = ModelConstants.DEVICE_CUSTOMER_ID_PROPERTY)
-    private String customerId;
+    @Column(name = ModelConstants.DEVICE_CUSTOMER_ID_PROPERTY, columnDefinition = "uuid")
+    private UUID customerId;
 
     @Column(name = ModelConstants.DEVICE_TYPE_PROPERTY)
     private String type;
@@ -67,13 +67,14 @@ public abstract class AbstractDeviceEntity<T extends Device> extends BaseSqlEnti
 
     public AbstractDeviceEntity(Device device) {
         if (device.getId() != null) {
-            this.setUuid(device.getId().getId());
+            this.setUuid(device.getUuidId());
         }
+        this.setCreatedTime(device.getCreatedTime());
         if (device.getTenantId() != null) {
-            this.tenantId = toString(device.getTenantId().getId());
+            this.tenantId = device.getTenantId().getId();
         }
         if (device.getCustomerId() != null) {
-            this.customerId = toString(device.getCustomerId().getId());
+            this.customerId = device.getCustomerId().getId();
         }
         this.name = device.getName();
         this.type = device.getType();
@@ -83,6 +84,7 @@ public abstract class AbstractDeviceEntity<T extends Device> extends BaseSqlEnti
 
     public AbstractDeviceEntity(DeviceEntity deviceEntity) {
         this.setId(deviceEntity.getId());
+        this.setCreatedTime(deviceEntity.getCreatedTime());
         this.tenantId = deviceEntity.getTenantId();
         this.customerId = deviceEntity.getCustomerId();
         this.type = deviceEntity.getType();
@@ -104,12 +106,12 @@ public abstract class AbstractDeviceEntity<T extends Device> extends BaseSqlEnti
 
     protected Device toDevice() {
         Device device = new Device(new DeviceId(getUuid()));
-        device.setCreatedTime(Uuids.unixTimestamp(getUuid()));
+        device.setCreatedTime(createdTime);
         if (tenantId != null) {
-            device.setTenantId(new TenantId(toUUID(tenantId)));
+            device.setTenantId(new TenantId(tenantId));
         }
         if (customerId != null) {
-            device.setCustomerId(new CustomerId(toUUID(customerId)));
+            device.setCustomerId(new CustomerId(customerId));
         }
         device.setName(name);
         device.setType(type);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.Data;
@@ -35,7 +34,10 @@ import org.thingsboard.server.dao.model.ModelConstants;
 import org.thingsboard.server.dao.model.SearchTextEntity;
 import org.thingsboard.server.dao.util.mapping.JsonStringType;
 
-import javax.persistence.*;
+import javax.persistence.Column;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.MappedSuperclass;
 import java.io.IOException;
 import java.util.UUID;
 
@@ -53,17 +55,17 @@ import static org.thingsboard.server.dao.model.ModelConstants.ENTITY_TYPE_PROPER
 public abstract class AbstractEntityViewEntity<T extends EntityView> extends BaseSqlEntity<T> implements SearchTextEntity<T> {
 
     @Column(name = ModelConstants.ENTITY_VIEW_ENTITY_ID_PROPERTY)
-    private String entityId;
+    private UUID entityId;
 
     @Enumerated(EnumType.STRING)
     @Column(name = ENTITY_TYPE_PROPERTY)
     private EntityType entityType;
 
     @Column(name = ModelConstants.ENTITY_VIEW_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.ENTITY_VIEW_CUSTOMER_ID_PROPERTY)
-    private String customerId;
+    private UUID customerId;
 
     @Column(name = ModelConstants.DEVICE_TYPE_PROPERTY)
     private String type;
@@ -97,15 +99,16 @@ public abstract class AbstractEntityViewEntity<T extends EntityView> extends Bas
         if (entityView.getId() != null) {
             this.setUuid(entityView.getId().getId());
         }
+        this.setCreatedTime(entityView.getCreatedTime());
         if (entityView.getEntityId() != null) {
-            this.entityId = toString(entityView.getEntityId().getId());
+            this.entityId = entityView.getEntityId().getId();
             this.entityType = entityView.getEntityId().getEntityType();
         }
         if (entityView.getTenantId() != null) {
-            this.tenantId = toString(entityView.getTenantId().getId());
+            this.tenantId = entityView.getTenantId().getId();
         }
         if (entityView.getCustomerId() != null) {
-            this.customerId = toString(entityView.getCustomerId().getId());
+            this.customerId = entityView.getCustomerId().getId();
         }
         this.type = entityView.getType();
         this.name = entityView.getName();
@@ -122,6 +125,7 @@ public abstract class AbstractEntityViewEntity<T extends EntityView> extends Bas
 
     public AbstractEntityViewEntity(EntityViewEntity entityViewEntity) {
         this.setId(entityViewEntity.getId());
+        this.setCreatedTime(entityViewEntity.getCreatedTime());
         this.entityId = entityViewEntity.getEntityId();
         this.entityType = entityViewEntity.getEntityType();
         this.tenantId = entityViewEntity.getTenantId();
@@ -147,16 +151,16 @@ public abstract class AbstractEntityViewEntity<T extends EntityView> extends Bas
 
     protected EntityView toEntityView() {
         EntityView entityView = new EntityView(new EntityViewId(getUuid()));
-        entityView.setCreatedTime(Uuids.unixTimestamp(getUuid()));
+        entityView.setCreatedTime(createdTime);
 
         if (entityId != null) {
-            entityView.setEntityId(EntityIdFactory.getByTypeAndId(entityType.name(), toUUID(entityId).toString()));
+            entityView.setEntityId(EntityIdFactory.getByTypeAndUuid(entityType.name(), entityId));
         }
         if (tenantId != null) {
-            entityView.setTenantId(new TenantId(toUUID(tenantId)));
+            entityView.setTenantId(new TenantId(tenantId));
         }
         if (customerId != null) {
-            entityView.setCustomerId(new CustomerId(toUUID(customerId)));
+            entityView.setCustomerId(new CustomerId(customerId));
         }
         entityView.setType(type);
         entityView.setName(name);

@@ -15,14 +15,12 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import org.hibernate.annotations.Type;
 import org.hibernate.annotations.TypeDef;
 import org.thingsboard.server.common.data.AdminSettings;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.AdminSettingsId;
 import org.thingsboard.server.dao.model.BaseEntity;
 import org.thingsboard.server.dao.model.BaseSqlEntity;
@@ -58,14 +56,15 @@ public final class AdminSettingsEntity extends BaseSqlEntity<AdminSettings> impl
         if (adminSettings.getId() != null) {
             this.setUuid(adminSettings.getId().getId());
         }
+        this.setCreatedTime(adminSettings.getCreatedTime());
         this.key = adminSettings.getKey();
         this.jsonValue = adminSettings.getJsonValue();
     }
 
     @Override
     public AdminSettings toData() {
-        AdminSettings adminSettings = new AdminSettings(new AdminSettingsId(UUIDConverter.fromString(id)));
-        adminSettings.setCreatedTime(Uuids.unixTimestamp(UUIDConverter.fromString(id)));
+        AdminSettings adminSettings = new AdminSettings(new AdminSettingsId(id));
+        adminSettings.setCreatedTime(createdTime);
         adminSettings.setKey(key);
         adminSettings.setJsonValue(jsonValue);
         return adminSettings;

@@ -25,6 +25,7 @@ import javax.persistence.Embeddable;
 import javax.persistence.EnumType;
 import javax.persistence.Enumerated;
 import java.io.Serializable;
+import java.util.UUID;
 
 import static org.thingsboard.server.dao.model.ModelConstants.ATTRIBUTE_KEY_COLUMN;
 import static org.thingsboard.server.dao.model.ModelConstants.ATTRIBUTE_TYPE_COLUMN;
@@ -39,8 +40,8 @@ public class AttributeKvCompositeKey implements Serializable {
     @Enumerated(EnumType.STRING)
     @Column(name = ENTITY_TYPE_COLUMN)
     private EntityType entityType;
-    @Column(name = ENTITY_ID_COLUMN)
-    private String entityId;
+    @Column(name = ENTITY_ID_COLUMN, columnDefinition = "uuid")
+    private UUID entityId;
     @Column(name = ATTRIBUTE_TYPE_COLUMN)
     private String attributeType;
     @Column(name = ATTRIBUTE_KEY_COLUMN)

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -40,6 +39,7 @@ import javax.persistence.Entity;
 import javax.persistence.EnumType;
 import javax.persistence.Enumerated;
 import javax.persistence.Table;
+import java.util.UUID;
 
 import static org.thingsboard.server.dao.model.ModelConstants.AUDIT_LOG_ACTION_DATA_PROPERTY;
 import static org.thingsboard.server.dao.model.ModelConstants.AUDIT_LOG_ACTION_FAILURE_DETAILS_PROPERTY;
@@ -61,23 +61,23 @@ import static org.thingsboard.server.dao.model.ModelConstants.AUDIT_LOG_USER_NAM
 public class AuditLogEntity extends BaseSqlEntity<AuditLog> implements BaseEntity<AuditLog> {
 
     @Column(name = AUDIT_LOG_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = AUDIT_LOG_CUSTOMER_ID_PROPERTY)
-    private String customerId;
+    private UUID customerId;
 
     @Enumerated(EnumType.STRING)
     @Column(name = AUDIT_LOG_ENTITY_TYPE_PROPERTY)
     private EntityType entityType;
 
     @Column(name = AUDIT_LOG_ENTITY_ID_PROPERTY)
-    private String entityId;
+    private UUID entityId;
 
     @Column(name = AUDIT_LOG_ENTITY_NAME_PROPERTY)
     private String entityName;
 
     @Column(name = AUDIT_LOG_USER_ID_PROPERTY)
-    private String userId;
+    private UUID userId;
 
     @Column(name = AUDIT_LOG_USER_NAME_PROPERTY)
     private String userName;
@@ -105,18 +105,19 @@ public class AuditLogEntity extends BaseSqlEntity<AuditLog> implements BaseEntit
         if (auditLog.getId() != null) {
             this.setUuid(auditLog.getId().getId());
         }
+        this.setCreatedTime(auditLog.getCreatedTime());
         if (auditLog.getTenantId() != null) {
-            this.tenantId = toString(auditLog.getTenantId().getId());
+            this.tenantId = auditLog.getTenantId().getId();
         }
         if (auditLog.getCustomerId() != null) {
-            this.customerId = toString(auditLog.getCustomerId().getId());
+            this.customerId = auditLog.getCustomerId().getId();
         }
         if (auditLog.getEntityId() != null) {
-            this.entityId = toString(auditLog.getEntityId().getId());
+            this.entityId = auditLog.getEntityId().getId();
             this.entityType = auditLog.getEntityId().getEntityType();
         }
         if (auditLog.getUserId() != null) {
-            this.userId = toString(auditLog.getUserId().getId());
+            this.userId = auditLog.getUserId().getId();
         }
         this.entityName = auditLog.getEntityName();
         this.userName = auditLog.getUserName();
@@ -129,18 +130,18 @@ public class AuditLogEntity extends BaseSqlEntity<AuditLog> implements BaseEntit
     @Override
     public AuditLog toData() {
         AuditLog auditLog = new AuditLog(new AuditLogId(this.getUuid()));
-        auditLog.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        auditLog.setCreatedTime(createdTime);
         if (tenantId != null) {
-            auditLog.setTenantId(new TenantId(toUUID(tenantId)));
+            auditLog.setTenantId(new TenantId(tenantId));
         }
         if (customerId != null) {
-            auditLog.setCustomerId(new CustomerId(toUUID(customerId)));
+            auditLog.setCustomerId(new CustomerId(customerId));
         }
         if (entityId != null) {
-            auditLog.setEntityId(EntityIdFactory.getByTypeAndId(entityType.name(), toUUID(entityId).toString()));
+            auditLog.setEntityId(EntityIdFactory.getByTypeAndUuid(entityType.name(), entityId));
         }
         if (userId != null) {
-            auditLog.setUserId(new UserId(toUUID(userId)));
+            auditLog.setUserId(new UserId(userId));
         }
         auditLog.setEntityName(this.entityName);
         auditLog.setUserName(this.userName);

@@ -73,6 +73,7 @@ public class ComponentDescriptorEntity extends BaseSqlEntity<ComponentDescriptor
         if (component.getId() != null) {
             this.setUuid(component.getId().getId());
         }
+        this.setCreatedTime(component.getCreatedTime());
         this.actions = component.getActions();
         this.type = component.getType();
         this.scope = component.getScope();
@@ -85,6 +86,7 @@ public class ComponentDescriptorEntity extends BaseSqlEntity<ComponentDescriptor
     @Override
     public ComponentDescriptor toData() {
         ComponentDescriptor data = new ComponentDescriptor(new ComponentDescriptorId(this.getUuid()));
+        data.setCreatedTime(createdTime);
         data.setType(type);
         data.setScope(scope);
         data.setName(this.getName());

@@ -15,14 +15,12 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import org.hibernate.annotations.Type;
 import org.hibernate.annotations.TypeDef;
 import org.thingsboard.server.common.data.Customer;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.dao.model.BaseSqlEntity;
@@ -33,6 +31,7 @@ import org.thingsboard.server.dao.util.mapping.JsonStringType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -42,7 +41,7 @@ import javax.persistence.Table;
 public final class CustomerEntity extends BaseSqlEntity<Customer> implements SearchTextEntity<Customer> {
 
     @Column(name = ModelConstants.CUSTOMER_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
     
     @Column(name = ModelConstants.CUSTOMER_TITLE_PROPERTY)
     private String title;
@@ -86,7 +85,8 @@ public final class CustomerEntity extends BaseSqlEntity<Customer> implements Sea
         if (customer.getId() != null) {
             this.setUuid(customer.getId().getId());
         }
-        this.tenantId = UUIDConverter.fromTimeUUID(customer.getTenantId().getId());
+        this.setCreatedTime(customer.getCreatedTime());
+        this.tenantId = customer.getTenantId().getId();
         this.title = customer.getTitle();
         this.country = customer.getCountry();
         this.state = customer.getState();
@@ -112,8 +112,8 @@ public final class CustomerEntity extends BaseSqlEntity<Customer> implements Sea
     @Override
     public Customer toData() {
         Customer customer = new Customer(new CustomerId(this.getUuid()));
-        customer.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
-        customer.setTenantId(new TenantId(UUIDConverter.fromString(tenantId)));
+        customer.setCreatedTime(createdTime);
+        customer.setTenantId(new TenantId(tenantId));
         customer.setTitle(title);
         customer.setCountry(country);
         customer.setState(state);
@@ -126,4 +126,5 @@ public final class CustomerEntity extends BaseSqlEntity<Customer> implements Sea
         customer.setAdditionalInfo(additionalInfo);
         return customer;
     }
+
 }

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.JsonNode;
@@ -40,6 +39,7 @@ import javax.persistence.Entity;
 import javax.persistence.Table;
 import java.io.IOException;
 import java.util.HashSet;
+import java.util.UUID;
 
 @Data
 @Slf4j
@@ -54,7 +54,7 @@ public final class DashboardEntity extends BaseSqlEntity<Dashboard> implements S
             objectMapper.getTypeFactory().constructCollectionType(HashSet.class, ShortCustomerInfo.class);
 
     @Column(name = ModelConstants.DASHBOARD_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.DASHBOARD_TITLE_PROPERTY)
     private String title;
@@ -77,8 +77,9 @@ public final class DashboardEntity extends BaseSqlEntity<Dashboard> implements S
         if (dashboard.getId() != null) {
             this.setUuid(dashboard.getId().getId());
         }
+        this.setCreatedTime(dashboard.getCreatedTime());
         if (dashboard.getTenantId() != null) {
-            this.tenantId = toString(dashboard.getTenantId().getId());
+            this.tenantId = dashboard.getTenantId().getId();
         }
         this.title = dashboard.getTitle();
         if (dashboard.getAssignedCustomers() != null) {
@@ -104,9 +105,9 @@ public final class DashboardEntity extends BaseSqlEntity<Dashboard> implements S
     @Override
     public Dashboard toData() {
         Dashboard dashboard = new Dashboard(new DashboardId(this.getUuid()));
-        dashboard.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        dashboard.setCreatedTime(this.getCreatedTime());
         if (tenantId != null) {
-            dashboard.setTenantId(new TenantId(toUUID(tenantId)));
+            dashboard.setTenantId(new TenantId(tenantId));
         }
         dashboard.setTitle(title);
         if (!StringUtils.isEmpty(assignedCustomers)) {

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -36,6 +35,7 @@ import javax.persistence.Entity;
 import javax.persistence.Table;
 import java.io.IOException;
 import java.util.HashSet;
+import java.util.UUID;
 
 @Data
 @Slf4j
@@ -49,7 +49,7 @@ public class DashboardInfoEntity extends BaseSqlEntity<DashboardInfo> implements
             objectMapper.getTypeFactory().constructCollectionType(HashSet.class, ShortCustomerInfo.class);
 
     @Column(name = ModelConstants.DASHBOARD_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.DASHBOARD_TITLE_PROPERTY)
     private String title;
@@ -68,8 +68,9 @@ public class DashboardInfoEntity extends BaseSqlEntity<DashboardInfo> implements
         if (dashboardInfo.getId() != null) {
             this.setUuid(dashboardInfo.getId().getId());
         }
+        this.setCreatedTime(dashboardInfo.getCreatedTime());
         if (dashboardInfo.getTenantId() != null) {
-            this.tenantId = toString(dashboardInfo.getTenantId().getId());
+            this.tenantId = dashboardInfo.getTenantId().getId();
         }
         this.title = dashboardInfo.getTitle();
         if (dashboardInfo.getAssignedCustomers() != null) {
@@ -98,9 +99,9 @@ public class DashboardInfoEntity extends BaseSqlEntity<DashboardInfo> implements
     @Override
     public DashboardInfo toData() {
         DashboardInfo dashboardInfo = new DashboardInfo(new DashboardId(this.getUuid()));
-        dashboardInfo.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        dashboardInfo.setCreatedTime(createdTime);
         if (tenantId != null) {
-            dashboardInfo.setTenantId(new TenantId(toUUID(tenantId)));
+            dashboardInfo.setTenantId(new TenantId(tenantId));
         }
         dashboardInfo.setTitle(title);
         if (!StringUtils.isEmpty(assignedCustomers)) {

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import org.thingsboard.server.common.data.id.DeviceCredentialsId;
@@ -31,6 +30,7 @@ import javax.persistence.Entity;
 import javax.persistence.EnumType;
 import javax.persistence.Enumerated;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -39,7 +39,7 @@ import javax.persistence.Table;
 public final class DeviceCredentialsEntity extends BaseSqlEntity<DeviceCredentials> implements BaseEntity<DeviceCredentials> {
 
     @Column(name = ModelConstants.DEVICE_CREDENTIALS_DEVICE_ID_PROPERTY)
-    private String deviceId;
+    private UUID deviceId;
 
     @Enumerated(EnumType.STRING)
     @Column(name = ModelConstants.DEVICE_CREDENTIALS_CREDENTIALS_TYPE_PROPERTY)
@@ -59,8 +59,9 @@ public final class DeviceCredentialsEntity extends BaseSqlEntity<DeviceCredentia
         if (deviceCredentials.getId() != null) {
             this.setUuid(deviceCredentials.getId().getId());
         }
+        this.setCreatedTime(deviceCredentials.getCreatedTime());
         if (deviceCredentials.getDeviceId() != null) {
-            this.deviceId = toString(deviceCredentials.getDeviceId().getId());
+            this.deviceId = deviceCredentials.getDeviceId().getId();
         }
         this.credentialsType = deviceCredentials.getCredentialsType();
         this.credentialsId = deviceCredentials.getCredentialsId();
@@ -70,9 +71,9 @@ public final class DeviceCredentialsEntity extends BaseSqlEntity<DeviceCredentia
     @Override
     public DeviceCredentials toData() {
         DeviceCredentials deviceCredentials = new DeviceCredentials(new DeviceCredentialsId(this.getUuid()));
-        deviceCredentials.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        deviceCredentials.setCreatedTime(createdTime);
         if (deviceId != null) {
-            deviceCredentials.setDeviceId(new DeviceId(toUUID(deviceId)));
+            deviceCredentials.setDeviceId(new DeviceId(deviceId));
         }
         deviceCredentials.setCredentialsType(credentialsType);
         deviceCredentials.setCredentialsId(credentialsId);

@@ -15,9 +15,9 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
+import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import com.fasterxml.jackson.databind.JsonNode;
 import org.thingsboard.server.common.data.DeviceInfo;
 
 import java.util.HashMap;

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -36,7 +35,6 @@ import javax.persistence.Entity;
 import javax.persistence.EnumType;
 import javax.persistence.Enumerated;
 import javax.persistence.Table;
-
 import java.util.UUID;
 
 import static org.thingsboard.server.dao.model.ModelConstants.EPOCH_DIFF;
@@ -55,17 +53,17 @@ import static org.thingsboard.server.dao.model.ModelConstants.TS_COLUMN;
 @TypeDef(name = "json", typeClass = JsonStringType.class)
 @Table(name = EVENT_COLUMN_FAMILY_NAME)
 @NoArgsConstructor
-public class EventEntity  extends BaseSqlEntity<Event> implements BaseEntity<Event> {
+public class EventEntity extends BaseSqlEntity<Event> implements BaseEntity<Event> {
 
     @Column(name = EVENT_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Enumerated(EnumType.STRING)
     @Column(name = EVENT_ENTITY_TYPE_PROPERTY)
     private EntityType entityType;
 
     @Column(name = EVENT_ENTITY_ID_PROPERTY)
-    private String entityId;
+    private UUID entityId;
 
     @Column(name = EVENT_TYPE_PROPERTY)
     private String eventType;
@@ -87,12 +85,13 @@ public class EventEntity  extends BaseSqlEntity<Event> implements BaseEntity<Eve
         } else {
             this.ts = System.currentTimeMillis();
         }
+        this.setCreatedTime(event.getCreatedTime());
         if (event.getTenantId() != null) {
-            this.tenantId = toString(event.getTenantId().getId());
+            this.tenantId = event.getTenantId().getId();
         }
         if (event.getEntityId() != null) {
             this.entityType = event.getEntityId().getEntityType();
-            this.entityId = toString(event.getEntityId().getId());
+            this.entityId = event.getEntityId().getId();
         }
         this.eventType = event.getType();
         this.eventUid = event.getUid();
@@ -103,9 +102,9 @@ public class EventEntity  extends BaseSqlEntity<Event> implements BaseEntity<Eve
     @Override
     public Event toData() {
         Event event = new Event(new EventId(this.getUuid()));
-        event.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
-        event.setTenantId(new TenantId(toUUID(tenantId)));
-        event.setEntityId(EntityIdFactory.getByTypeAndUuid(entityType, toUUID(entityId)));
+        event.setCreatedTime(createdTime);
+        event.setTenantId(new TenantId(tenantId));
+        event.setEntityId(EntityIdFactory.getByTypeAndUuid(entityType, entityId));
         event.setBody(body);
         event.setType(eventType);
         event.setUid(eventUid);

@@ -18,11 +18,11 @@ package org.thingsboard.server.dao.model.sql;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.relation.EntityRelation;
 
 import javax.persistence.Transient;
 import java.io.Serializable;
+import java.util.UUID;
 
 @NoArgsConstructor
 @AllArgsConstructor
@@ -32,17 +32,17 @@ public class RelationCompositeKey implements Serializable {
     @Transient
     private static final long serialVersionUID = -4089175869616037592L;
 
-    private String fromId;
+    private UUID fromId;
     private String fromType;
-    private String toId;
+    private UUID toId;
     private String toType;
     private String relationType;
     private String relationTypeGroup;
 
     public RelationCompositeKey(EntityRelation relation) {
-        this.fromId = UUIDConverter.fromTimeUUID(relation.getFrom().getId());
+        this.fromId = relation.getFrom().getId();
         this.fromType = relation.getFrom().getEntityType().name();
-        this.toId = UUIDConverter.fromTimeUUID(relation.getTo().getId());
+        this.toId = relation.getTo().getId();
         this.toType = relation.getTo().getEntityType().name();
         this.relationType = relation.getType();
         this.relationTypeGroup = relation.getTypeGroup().name();

@@ -19,7 +19,6 @@ import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import org.hibernate.annotations.Type;
 import org.hibernate.annotations.TypeDef;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.EntityIdFactory;
 import org.thingsboard.server.common.data.relation.EntityRelation;
 import org.thingsboard.server.common.data.relation.RelationTypeGroup;
@@ -31,6 +30,7 @@ import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.IdClass;
 import javax.persistence.Table;
+import java.util.UUID;
 
 import static org.thingsboard.server.dao.model.ModelConstants.ADDITIONAL_INFO_PROPERTY;
 import static org.thingsboard.server.dao.model.ModelConstants.RELATION_COLUMN_FAMILY_NAME;
@@ -49,16 +49,16 @@ import static org.thingsboard.server.dao.model.ModelConstants.RELATION_TYPE_PROP
 public final class RelationEntity implements ToData<EntityRelation> {
 
     @Id
-    @Column(name = RELATION_FROM_ID_PROPERTY)
-    private String fromId;
+    @Column(name = RELATION_FROM_ID_PROPERTY, columnDefinition = "uuid")
+    private UUID fromId;
 
     @Id
     @Column(name = RELATION_FROM_TYPE_PROPERTY)
     private String fromType;
 
     @Id
-    @Column(name = RELATION_TO_ID_PROPERTY)
-    private String toId;
+    @Column(name = RELATION_TO_ID_PROPERTY, columnDefinition = "uuid")
+    private UUID toId;
 
     @Id
     @Column(name = RELATION_TO_TYPE_PROPERTY)
@@ -82,11 +82,11 @@ public final class RelationEntity implements ToData<EntityRelation> {
 
     public RelationEntity(EntityRelation relation) {
         if (relation.getTo() != null) {
-            this.toId = UUIDConverter.fromTimeUUID(relation.getTo().getId());
+            this.toId = relation.getTo().getId();
             this.toType = relation.getTo().getEntityType().name();
         }
         if (relation.getFrom() != null) {
-            this.fromId = UUIDConverter.fromTimeUUID(relation.getFrom().getId());
+            this.fromId = relation.getFrom().getId();
             this.fromType = relation.getFrom().getEntityType().name();
         }
         this.relationType = relation.getType();
@@ -98,10 +98,10 @@ public final class RelationEntity implements ToData<EntityRelation> {
     public EntityRelation toData() {
         EntityRelation relation = new EntityRelation();
         if (toId != null && toType != null) {
-            relation.setTo(EntityIdFactory.getByTypeAndUuid(toType, UUIDConverter.fromString(toId)));
+            relation.setTo(EntityIdFactory.getByTypeAndUuid(toType, toId));
         }
         if (fromId != null && fromType != null) {
-            relation.setFrom(EntityIdFactory.getByTypeAndUuid(fromType, UUIDConverter.fromString(fromId)));
+            relation.setFrom(EntityIdFactory.getByTypeAndUuid(fromType, fromId));
         }
         relation.setType(relationType);
         relation.setTypeGroup(RelationTypeGroup.valueOf(relationTypeGroup));

@@ -15,13 +15,11 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import org.hibernate.annotations.Type;
 import org.hibernate.annotations.TypeDef;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.RuleChainId;
 import org.thingsboard.server.common.data.id.RuleNodeId;
 import org.thingsboard.server.common.data.id.TenantId;
@@ -35,6 +33,7 @@ import org.thingsboard.server.dao.util.mapping.JsonStringType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -44,7 +43,7 @@ import javax.persistence.Table;
 public class RuleChainEntity extends BaseSqlEntity<RuleChain> implements SearchTextEntity<RuleChain> {
 
     @Column(name = ModelConstants.RULE_CHAIN_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.RULE_CHAIN_NAME_PROPERTY)
     private String name;
@@ -53,7 +52,7 @@ public class RuleChainEntity extends BaseSqlEntity<RuleChain> implements SearchT
     private String searchText;
 
     @Column(name = ModelConstants.RULE_CHAIN_FIRST_RULE_NODE_ID_PROPERTY)
-    private String firstRuleNodeId;
+    private UUID firstRuleNodeId;
 
     @Column(name = ModelConstants.RULE_CHAIN_ROOT_PROPERTY)
     private boolean root;
@@ -76,11 +75,12 @@ public class RuleChainEntity extends BaseSqlEntity<RuleChain> implements SearchT
         if (ruleChain.getId() != null) {
             this.setUuid(ruleChain.getUuidId());
         }
-        this.tenantId = toString(DaoUtil.getId(ruleChain.getTenantId()));
+        this.setCreatedTime(ruleChain.getCreatedTime());
+        this.tenantId = DaoUtil.getId(ruleChain.getTenantId());
         this.name = ruleChain.getName();
         this.searchText = ruleChain.getName();
         if (ruleChain.getFirstRuleNodeId() != null) {
-            this.firstRuleNodeId = UUIDConverter.fromTimeUUID(ruleChain.getFirstRuleNodeId().getId());
+            this.firstRuleNodeId = ruleChain.getFirstRuleNodeId().getId();
         }
         this.root = ruleChain.isRoot();
         this.debugMode = ruleChain.isDebugMode();
@@ -101,11 +101,11 @@ public class RuleChainEntity extends BaseSqlEntity<RuleChain> implements SearchT
     @Override
     public RuleChain toData() {
         RuleChain ruleChain = new RuleChain(new RuleChainId(this.getUuid()));
-        ruleChain.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
-        ruleChain.setTenantId(new TenantId(toUUID(tenantId)));
+        ruleChain.setCreatedTime(createdTime);
+        ruleChain.setTenantId(new TenantId(tenantId));
         ruleChain.setName(name);
         if (firstRuleNodeId != null) {
-            ruleChain.setFirstRuleNodeId(new RuleNodeId(UUIDConverter.fromString(firstRuleNodeId)));
+            ruleChain.setFirstRuleNodeId(new RuleNodeId(firstRuleNodeId));
         }
         ruleChain.setRoot(root);
         ruleChain.setDebugMode(debugMode);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -33,6 +32,7 @@ import org.thingsboard.server.dao.util.mapping.JsonStringType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -42,7 +42,7 @@ import javax.persistence.Table;
 public class RuleNodeEntity extends BaseSqlEntity<RuleNode> implements SearchTextEntity<RuleNode> {
 
     @Column(name = ModelConstants.RULE_NODE_CHAIN_ID_PROPERTY)
-    private String ruleChainId;
+    private UUID ruleChainId;
 
     @Column(name = ModelConstants.RULE_NODE_TYPE_PROPERTY)
     private String type;
@@ -71,8 +71,9 @@ public class RuleNodeEntity extends BaseSqlEntity<RuleNode> implements SearchTex
         if (ruleNode.getId() != null) {
             this.setUuid(ruleNode.getUuidId());
         }
+        this.setCreatedTime(ruleNode.getCreatedTime());
         if (ruleNode.getRuleChainId() != null) {
-            this.ruleChainId = toString(DaoUtil.getId(ruleNode.getRuleChainId()));
+            this.ruleChainId = DaoUtil.getId(ruleNode.getRuleChainId());
         }
         this.type = ruleNode.getType();
         this.name = ruleNode.getName();
@@ -95,9 +96,9 @@ public class RuleNodeEntity extends BaseSqlEntity<RuleNode> implements SearchTex
     @Override
     public RuleNode toData() {
         RuleNode ruleNode = new RuleNode(new RuleNodeId(this.getUuid()));
-        ruleNode.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        ruleNode.setCreatedTime(createdTime);
         if (ruleChainId != null) {
-            ruleNode.setRuleChainId(new RuleChainId(toUUID(ruleChainId)));
+            ruleNode.setRuleChainId(new RuleChainId(ruleChainId));
         }
         ruleNode.setType(type);
         ruleNode.setName(name);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -90,6 +89,7 @@ public final class TenantEntity extends BaseSqlEntity<Tenant> implements SearchT
         if (tenant.getId() != null) {
             this.setUuid(tenant.getId().getId());
         }
+        this.setCreatedTime(tenant.getCreatedTime());
         this.title = tenant.getTitle();
         this.region = tenant.getRegion();
         this.country = tenant.getCountry();
@@ -122,7 +122,7 @@ public final class TenantEntity extends BaseSqlEntity<Tenant> implements SearchT
     @Override
     public Tenant toData() {
         Tenant tenant = new Tenant(new TenantId(this.getUuid()));
-        tenant.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        tenant.setCreatedTime(createdTime);
         tenant.setTitle(title);
         tenant.setRegion(region);
         tenant.setCountry(country);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import org.thingsboard.server.common.data.id.UserCredentialsId;
@@ -28,6 +27,7 @@ import org.thingsboard.server.dao.model.ModelConstants;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -36,7 +36,7 @@ import javax.persistence.Table;
 public final class UserCredentialsEntity extends BaseSqlEntity<UserCredentials> implements BaseEntity<UserCredentials> {
 
     @Column(name = ModelConstants.USER_CREDENTIALS_USER_ID_PROPERTY, unique = true)
-    private String userId;
+    private UUID userId;
 
     @Column(name = ModelConstants.USER_CREDENTIALS_ENABLED_PROPERTY)
     private boolean enabled;
@@ -58,8 +58,9 @@ public final class UserCredentialsEntity extends BaseSqlEntity<UserCredentials>
         if (userCredentials.getId() != null) {
             this.setUuid(userCredentials.getId().getId());
         }
+        this.setCreatedTime(userCredentials.getCreatedTime());
         if (userCredentials.getUserId() != null) {
-            this.userId = toString(userCredentials.getUserId().getId());
+            this.userId = userCredentials.getUserId().getId();
         }
         this.enabled = userCredentials.isEnabled();
         this.password = userCredentials.getPassword();
@@ -70,9 +71,9 @@ public final class UserCredentialsEntity extends BaseSqlEntity<UserCredentials>
     @Override
     public UserCredentials toData() {
         UserCredentials userCredentials = new UserCredentials(new UserCredentialsId(this.getUuid()));
-        userCredentials.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        userCredentials.setCreatedTime(createdTime);
         if (userId != null) {
-            userCredentials.setUserId(new UserId(toUUID(userId)));
+            userCredentials.setUserId(new UserId(userId));
         }
         userCredentials.setEnabled(enabled);
         userCredentials.setPassword(password);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -36,9 +35,7 @@ import javax.persistence.Entity;
 import javax.persistence.EnumType;
 import javax.persistence.Enumerated;
 import javax.persistence.Table;
-
-import static org.thingsboard.server.common.data.UUIDConverter.fromString;
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 4/21/2017.
@@ -51,10 +48,10 @@ import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
 public class UserEntity extends BaseSqlEntity<User> implements SearchTextEntity<User> {
 
     @Column(name = ModelConstants.USER_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.USER_CUSTOMER_ID_PROPERTY)
-    private String customerId;
+    private UUID customerId;
 
     @Enumerated(EnumType.STRING)
     @Column(name = ModelConstants.USER_AUTHORITY_PROPERTY)
@@ -83,12 +80,13 @@ public class UserEntity extends BaseSqlEntity<User> implements SearchTextEntity<
         if (user.getId() != null) {
             this.setUuid(user.getId().getId());
         }
+        this.setCreatedTime(user.getCreatedTime());
         this.authority = user.getAuthority();
         if (user.getTenantId() != null) {
-            this.tenantId = fromTimeUUID(user.getTenantId().getId());
+            this.tenantId = user.getTenantId().getId();
         }
         if (user.getCustomerId() != null) {
-            this.customerId = fromTimeUUID(user.getCustomerId().getId());
+            this.customerId = user.getCustomerId().getId();
         }
         this.email = user.getEmail();
         this.firstName = user.getFirstName();
@@ -109,13 +107,13 @@ public class UserEntity extends BaseSqlEntity<User> implements SearchTextEntity<
     @Override
     public User toData() {
         User user = new User(new UserId(this.getUuid()));
-        user.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        user.setCreatedTime(createdTime);
         user.setAuthority(authority);
         if (tenantId != null) {
-            user.setTenantId(new TenantId(fromString(tenantId)));
+            user.setTenantId(new TenantId(tenantId));
         }
         if (customerId != null) {
-            user.setCustomerId(new CustomerId(fromString(customerId)));
+            user.setCustomerId(new CustomerId(customerId));
         }
         user.setEmail(email);
         user.setFirstName(firstName);

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.model.sql;
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.fasterxml.jackson.databind.JsonNode;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -32,6 +31,7 @@ import org.thingsboard.server.dao.util.mapping.JsonStringType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -41,7 +41,7 @@ import javax.persistence.Table;
 public final class WidgetTypeEntity  extends BaseSqlEntity<WidgetType> implements BaseEntity<WidgetType> {
 
     @Column(name = ModelConstants.WIDGET_TYPE_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.WIDGET_TYPE_BUNDLE_ALIAS_PROPERTY)
     private String bundleAlias;
@@ -64,8 +64,9 @@ public final class WidgetTypeEntity  extends BaseSqlEntity<WidgetType> implement
         if (widgetType.getId() != null) {
             this.setUuid(widgetType.getId().getId());
         }
+        this.setCreatedTime(widgetType.getCreatedTime());
         if (widgetType.getTenantId() != null) {
-            this.tenantId = toString(widgetType.getTenantId().getId());
+            this.tenantId = widgetType.getTenantId().getId();
         }
         this.bundleAlias = widgetType.getBundleAlias();
         this.alias = widgetType.getAlias();
@@ -76,9 +77,9 @@ public final class WidgetTypeEntity  extends BaseSqlEntity<WidgetType> implement
     @Override
     public WidgetType toData() {
         WidgetType widgetType = new WidgetType(new WidgetTypeId(this.getUuid()));
-        widgetType.setCreatedTime(Uuids.unixTimestamp(this.getUuid()));
+        widgetType.setCreatedTime(createdTime);
         if (tenantId != null) {
-            widgetType.setTenantId(new TenantId(toUUID(tenantId)));
+            widgetType.setTenantId(new TenantId(tenantId));
         }
         widgetType.setBundleAlias(bundleAlias);
         widgetType.setAlias(alias);

@@ -16,10 +16,8 @@
 package org.thingsboard.server.dao.model.sql;
 
 
-import com.datastax.oss.driver.api.core.uuid.Uuids;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.id.WidgetsBundleId;
 import org.thingsboard.server.common.data.widget.WidgetsBundle;
@@ -30,6 +28,7 @@ import org.thingsboard.server.dao.model.SearchTextEntity;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
+import java.util.UUID;
 
 @Data
 @EqualsAndHashCode(callSuper = true)
@@ -38,7 +37,7 @@ import javax.persistence.Table;
 public final class WidgetsBundleEntity extends BaseSqlEntity<WidgetsBundle> implements SearchTextEntity<WidgetsBundle> {
 
     @Column(name = ModelConstants.WIDGETS_BUNDLE_TENANT_ID_PROPERTY)
-    private String tenantId;
+    private UUID tenantId;
 
     @Column(name = ModelConstants.WIDGETS_BUNDLE_ALIAS_PROPERTY)
     private String alias;
@@ -57,8 +56,9 @@ public final class WidgetsBundleEntity extends BaseSqlEntity<WidgetsBundle> impl
         if (widgetsBundle.getId() != null) {
             this.setUuid(widgetsBundle.getId().getId());
         }
+        this.setCreatedTime(widgetsBundle.getCreatedTime());
         if (widgetsBundle.getTenantId() != null) {
-            this.tenantId = UUIDConverter.fromTimeUUID(widgetsBundle.getTenantId().getId());
+            this.tenantId = widgetsBundle.getTenantId().getId();
         }
         this.alias = widgetsBundle.getAlias();
         this.title = widgetsBundle.getTitle();
@@ -76,10 +76,10 @@ public final class WidgetsBundleEntity extends BaseSqlEntity<WidgetsBundle> impl
 
     @Override
     public WidgetsBundle toData() {
-        WidgetsBundle widgetsBundle = new WidgetsBundle(new WidgetsBundleId(UUIDConverter.fromString(id)));
-        widgetsBundle.setCreatedTime(Uuids.unixTimestamp(UUIDConverter.fromString(id)));
+        WidgetsBundle widgetsBundle = new WidgetsBundle(new WidgetsBundleId(id));
+        widgetsBundle.setCreatedTime(createdTime);
         if (tenantId != null) {
-            widgetsBundle.setTenantId(new TenantId(UUIDConverter.fromString(tenantId)));
+            widgetsBundle.setTenantId(new TenantId(tenantId));
         }
         widgetsBundle.setAlias(alias);
         widgetsBundle.setTitle(title);

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.model.sqlts.latest;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
-import org.thingsboard.server.common.data.EntityType;
 
 import javax.persistence.Transient;
 import java.io.Serializable;

@@ -19,11 +19,9 @@ import lombok.Data;
 import org.thingsboard.server.dao.model.sql.AbstractTsKvEntity;
 import org.thingsboard.server.dao.sqlts.latest.SearchTsKvLatestRepository;
 
-import javax.persistence.Column;
 import javax.persistence.ColumnResult;
 import javax.persistence.ConstructorResult;
 import javax.persistence.Entity;
-import javax.persistence.Id;
 import javax.persistence.IdClass;
 import javax.persistence.NamedNativeQueries;
 import javax.persistence.NamedNativeQuery;
@@ -32,8 +30,6 @@ import javax.persistence.SqlResultSetMappings;
 import javax.persistence.Table;
 import java.util.UUID;
 
-import static org.thingsboard.server.dao.model.ModelConstants.KEY_COLUMN;
-
 @Data
 @Entity
 @Table(name = "ts_kv_latest")

@@ -18,14 +18,10 @@ package org.thingsboard.server.dao.model.sqlts.ts;
 import lombok.Data;
 import org.thingsboard.server.dao.model.sql.AbstractTsKvEntity;
 
-import javax.persistence.Column;
 import javax.persistence.Entity;
-import javax.persistence.Id;
 import javax.persistence.IdClass;
 import javax.persistence.Table;
 
-import static org.thingsboard.server.dao.model.ModelConstants.KEY_COLUMN;
-
 @Data
 @Entity
 @Table(name = "ts_kv")

@@ -15,10 +15,7 @@
  */
 package org.thingsboard.server.dao.nosql;
 
-import com.datastax.oss.driver.api.core.cql.AsyncResultSet;
-import com.datastax.oss.driver.api.core.cql.Row;
 import com.google.common.base.Function;
-import com.google.common.collect.Lists;
 import com.google.common.util.concurrent.AsyncFunction;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
@@ -27,11 +24,8 @@ import org.thingsboard.common.util.ThingsBoardThreadFactory;
 import javax.annotation.Nullable;
 import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.stream.Collectors;
 
 /**
  * Created by ashvayka on 21.02.17.

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.nosql;
 
-import com.datastax.oss.driver.api.core.cql.AsyncResultSet;
 import com.google.common.util.concurrent.ListenableFuture;
 import com.google.common.util.concurrent.SettableFuture;
 import lombok.extern.slf4j.Slf4j;

@@ -59,6 +59,4 @@ public interface RelationDao {
 
     ListenableFuture<Boolean> deleteOutboundRelationsAsync(TenantId tenantId, EntityId entity);
 
-    ListenableFuture<PageData<EntityRelation>> findRelations(TenantId tenantId, EntityId from, String relationType, RelationTypeGroup typeGroup, EntityType toType, TimePageLink pageLink);
-
 }

@@ -48,7 +48,6 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
-import java.util.stream.Collectors;
 
 /**
  * Created by igor on 3/12/18.

@@ -20,7 +20,6 @@ import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.rule.RuleChain;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.UUID;
 
 /**

@@ -20,9 +20,6 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 
-import java.util.List;
-import java.util.UUID;
-
 public abstract class PaginatedRemover<I, D extends IdBased<?>> {
 
     private static final int DEFAULT_LIMIT = 100;

@@ -20,9 +20,6 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.TimePageLink;
 
-import java.util.List;
-import java.util.UUID;
-
 public abstract class TimePaginatedRemover<I, D extends IdBased<?>> {
 
     private static final int DEFAULT_LIMIT = 100;

@@ -20,7 +20,6 @@ import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.thingsboard.server.common.data.AdminSettings;
-import org.thingsboard.server.common.data.Tenant;
 import org.thingsboard.server.common.data.id.AdminSettingsId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.dao.exception.DataValidationException;

@@ -30,8 +30,6 @@ import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-
 /**
  * @author Valerii Sosliuk
  */
@@ -42,9 +40,10 @@ public abstract class JpaAbstractDao<E extends BaseEntity<D>, D>
 
     protected abstract Class<E> getEntityClass();
 
-    protected abstract CrudRepository<E, String> getCrudRepository();
+    protected abstract CrudRepository<E, UUID> getCrudRepository();
 
-    protected void setSearchText(E entity) {}
+    protected void setSearchText(E entity) {
+    }
 
     @Override
     @Transactional
@@ -59,7 +58,9 @@ public abstract class JpaAbstractDao<E extends BaseEntity<D>, D>
         setSearchText(entity);
         log.debug("Saving entity {}", entity);
         if (entity.getUuid() == null) {
-            entity.setUuid(Uuids.timeBased());
+            UUID uuid = Uuids.timeBased();
+            entity.setUuid(uuid);
+            entity.setCreatedTime(Uuids.unixTimestamp(uuid));
         }
         entity = getCrudRepository().save(entity);
         return DaoUtil.getData(entity);
@@ -68,23 +69,22 @@ public abstract class JpaAbstractDao<E extends BaseEntity<D>, D>
     @Override
     public D findById(TenantId tenantId, UUID key) {
         log.debug("Get entity by key {}", key);
-        Optional<E> entity = getCrudRepository().findById(fromTimeUUID(key));
+        Optional<E> entity = getCrudRepository().findById(key);
         return DaoUtil.getData(entity);
     }
 
     @Override
     public ListenableFuture<D> findByIdAsync(TenantId tenantId, UUID key) {
         log.debug("Get entity by key async {}", key);
-        return service.submit(() -> DaoUtil.getData(getCrudRepository().findById(fromTimeUUID(key))));
+        return service.submit(() -> DaoUtil.getData(getCrudRepository().findById(key)));
     }
 
     @Override
     @Transactional
     public boolean removeById(TenantId tenantId, UUID id) {
-        String key = fromTimeUUID(id);
-        getCrudRepository().deleteById(key);
-        log.debug("Remove request: {}", key);
-        return !getCrudRepository().existsById(key);
+        getCrudRepository().deleteById(id);
+        log.debug("Remove request: {}", id);
+        return !getCrudRepository().existsById(id);
     }
 
     @Override

@@ -34,6 +34,7 @@ import java.util.UUID;
  */
 public abstract class JpaAbstractSearchTimeDao<E extends BaseEntity<D>, D> extends JpaAbstractDao<E, D> {
 
+    //TODO 3.1: refactoring to createdTime column
     public static <T> Specification<T> getTimeSearchPageSpec(TimePageLink pageLink, String idColumn) {
         return new Specification<T>() {
             @Override

@@ -20,21 +20,21 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.query.Param;
-import org.thingsboard.server.common.data.EntityType;
 import org.thingsboard.server.dao.model.sql.AlarmEntity;
 import org.thingsboard.server.dao.model.sql.AlarmInfoEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/21/2017.
  */
 @SqlDao
-public interface AlarmRepository extends CrudRepository<AlarmEntity, String> {
+public interface AlarmRepository extends CrudRepository<AlarmEntity, UUID> {
 
     @Query("SELECT a FROM AlarmEntity a WHERE a.originatorId = :originatorId AND a.type = :alarmType ORDER BY a.startTs DESC")
-    List<AlarmEntity> findLatestByOriginatorAndType(@Param("originatorId") String originatorId,
+    List<AlarmEntity> findLatestByOriginatorAndType(@Param("originatorId") UUID originatorId,
                                                     @Param("alarmType") String alarmType,
                                                     Pageable pageable);
 
@@ -46,9 +46,8 @@ public interface AlarmRepository extends CrudRepository<AlarmEntity, String> {
             "AND re.relationType = :relationType " +
             "AND re.fromId = :affectedEntityId " +
             "AND re.fromType = :affectedEntityType " +
-            "AND (:startId IS NULL OR a.id >= :startId) " +
-            "AND (:endId IS NULL OR a.id <= :endId) " +
-            "AND (:idOffset IS NULL OR a.id < :idOffset) " +
+            "AND (:startTime IS NULL OR a.createdTime >= :startTime) " +
+            "AND (:endTime IS NULL OR a.createdTime <= :endTime) " +
             "AND (LOWER(a.type) LIKE LOWER(CONCAT(:searchText, '%'))" +
             "OR LOWER(a.severity) LIKE LOWER(CONCAT(:searchText, '%'))" +
             "OR LOWER(a.status) LIKE LOWER(CONCAT(:searchText, '%')))",
@@ -60,19 +59,17 @@ public interface AlarmRepository extends CrudRepository<AlarmEntity, String> {
                     "AND re.relationType = :relationType " +
                     "AND re.fromId = :affectedEntityId " +
                     "AND re.fromType = :affectedEntityType " +
-                    "AND (:startId IS NULL OR a.id >= :startId) " +
-                    "AND (:endId IS NULL OR a.id <= :endId) " +
-                    "AND (:idOffset IS NULL OR a.id < :idOffset) " +
+                    "AND (:startTime IS NULL OR a.createdTime >= :startTime) " +
+                    "AND (:endTime IS NULL OR a.createdTime <= :endTime) " +
                     "AND (LOWER(a.type) LIKE LOWER(CONCAT(:searchText, '%'))" +
                     "OR LOWER(a.severity) LIKE LOWER(CONCAT(:searchText, '%'))" +
                     "OR LOWER(a.status) LIKE LOWER(CONCAT(:searchText, '%')))")
-    Page<AlarmInfoEntity> findAlarms(@Param("tenantId") String tenantId,
-                                     @Param("affectedEntityId") String affectedEntityId,
+    Page<AlarmInfoEntity> findAlarms(@Param("tenantId") UUID tenantId,
+                                     @Param("affectedEntityId") UUID affectedEntityId,
                                      @Param("affectedEntityType") String affectedEntityType,
                                      @Param("relationType") String relationType,
-                                     @Param("startId") String startId,
-                                     @Param("endId") String endId,
-                                     @Param("idOffset") String idOffset,
+                                     @Param("startTime") Long startTime,
+                                     @Param("endTime") Long endTime,
                                      @Param("searchText") String searchText,
                                      Pageable pageable);
 }

@@ -41,7 +41,6 @@ import java.util.List;
 import java.util.Objects;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
 import static org.thingsboard.server.dao.DaoUtil.endTimeToId;
 import static org.thingsboard.server.dao.DaoUtil.startTimeToId;
 
@@ -65,7 +64,7 @@ public class JpaAlarmDao extends JpaAbstractDao<AlarmEntity, Alarm> implements A
     }
 
     @Override
-    protected CrudRepository<AlarmEntity, String> getCrudRepository() {
+    protected CrudRepository<AlarmEntity, UUID> getCrudRepository() {
         return alarmRepository;
     }
 
@@ -78,7 +77,7 @@ public class JpaAlarmDao extends JpaAbstractDao<AlarmEntity, Alarm> implements A
     public ListenableFuture<Alarm> findLatestByOriginatorAndType(TenantId tenantId, EntityId originator, String type) {
         return service.submit(() -> {
             List<AlarmEntity> latest = alarmRepository.findLatestByOriginatorAndType(
-                    UUIDConverter.fromTimeUUID(originator.getId()),
+                    originator.getId(),
                     type,
                     PageRequest.of(0, 1));
             return latest.isEmpty() ? null : DaoUtil.getData(latest.get(0));
@@ -106,13 +105,12 @@ public class JpaAlarmDao extends JpaAbstractDao<AlarmEntity, Alarm> implements A
 
         return DaoUtil.toPageData(
             alarmRepository.findAlarms(
-                    fromTimeUUID(tenantId.getId()),
-                    fromTimeUUID(affectedEntity.getId()),
+                    tenantId.getId(),
+                    affectedEntity.getId(),
                     affectedEntity.getEntityType().name(),
                     relationType,
-                    startTimeToId(query.getPageLink().getStartTime()),
-                    endTimeToId(query.getPageLink().getEndTime()),
-                    query.getIdOffset() != null ? UUIDConverter.fromTimeUUID(query.getIdOffset()) : null,
+                    query.getPageLink().getStartTime(),
+                    query.getPageLink().getEndTime(),
                     Objects.toString(query.getPageLink().getTextSearch(), ""),
                     DaoUtil.toPageable(query.getPageLink())
             )

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.asset;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.AssetEntity;
@@ -26,22 +25,23 @@ import org.thingsboard.server.dao.model.sql.AssetInfoEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/21/2017.
  */
 @SqlDao
-public interface AssetRepository extends PagingAndSortingRepository<AssetEntity, String> {
+public interface AssetRepository extends PagingAndSortingRepository<AssetEntity, UUID> {
 
     @Query("SELECT new org.thingsboard.server.dao.model.sql.AssetInfoEntity(a, c.title, c.additionalInfo) " +
             "FROM AssetEntity a " +
             "LEFT JOIN CustomerEntity c on c.id = a.customerId " +
             "WHERE a.id = :assetId")
-    AssetInfoEntity findAssetInfoById(@Param("assetId") String assetId);
+    AssetInfoEntity findAssetInfoById(@Param("assetId") UUID assetId);
 
     @Query("SELECT a FROM AssetEntity a WHERE a.tenantId = :tenantId " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<AssetEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                      @Param("textSearch") String textSearch,
                                      Pageable pageable);
 
@@ -50,15 +50,15 @@ public interface AssetRepository extends PagingAndSortingRepository<AssetEntity,
             "LEFT JOIN CustomerEntity c on c.id = a.customerId " +
             "WHERE a.tenantId = :tenantId " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetInfoEntity> findAssetInfosByTenantId(@Param("tenantId") String tenantId,
+    Page<AssetInfoEntity> findAssetInfosByTenantId(@Param("tenantId") UUID tenantId,
                                                    @Param("textSearch") String textSearch,
                                                    Pageable pageable);
 
     @Query("SELECT a FROM AssetEntity a WHERE a.tenantId = :tenantId " +
             "AND a.customerId = :customerId " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetEntity> findByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                  @Param("customerId") String customerId,
+    Page<AssetEntity> findByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                  @Param("customerId") UUID customerId,
                                                   @Param("textSearch") String textSearch,
                                                   Pageable pageable);
 
@@ -68,21 +68,21 @@ public interface AssetRepository extends PagingAndSortingRepository<AssetEntity,
             "WHERE a.tenantId = :tenantId " +
             "AND a.customerId = :customerId " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<AssetInfoEntity> findAssetInfosByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                                @Param("customerId") String customerId,
+    Page<AssetInfoEntity> findAssetInfosByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                                @Param("customerId") UUID customerId,
                                                                 @Param("searchText") String searchText,
                                                                 Pageable pageable);
 
-    List<AssetEntity> findByTenantIdAndIdIn(String tenantId, List<String> assetIds);
+    List<AssetEntity> findByTenantIdAndIdIn(UUID tenantId, List<UUID> assetIds);
 
-    List<AssetEntity> findByTenantIdAndCustomerIdAndIdIn(String tenantId, String customerId, List<String> assetIds);
+    List<AssetEntity> findByTenantIdAndCustomerIdAndIdIn(UUID tenantId, UUID customerId, List<UUID> assetIds);
 
-    AssetEntity findByTenantIdAndName(String tenantId, String name);
+    AssetEntity findByTenantIdAndName(UUID tenantId, String name);
 
     @Query("SELECT a FROM AssetEntity a WHERE a.tenantId = :tenantId " +
             "AND a.type = :type " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetEntity> findByTenantIdAndType(@Param("tenantId") String tenantId,
+    Page<AssetEntity> findByTenantIdAndType(@Param("tenantId") UUID tenantId,
                                             @Param("type") String type,
                                             @Param("textSearch") String textSearch,
                                             Pageable pageable);
@@ -93,7 +93,7 @@ public interface AssetRepository extends PagingAndSortingRepository<AssetEntity,
             "WHERE a.tenantId = :tenantId " +
             "AND a.type = :type " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetInfoEntity> findAssetInfosByTenantIdAndType(@Param("tenantId") String tenantId,
+    Page<AssetInfoEntity> findAssetInfosByTenantIdAndType(@Param("tenantId") UUID tenantId,
                                                           @Param("type") String type,
                                                           @Param("textSearch") String textSearch,
                                                           Pageable pageable);
@@ -102,8 +102,8 @@ public interface AssetRepository extends PagingAndSortingRepository<AssetEntity,
     @Query("SELECT a FROM AssetEntity a WHERE a.tenantId = :tenantId " +
             "AND a.customerId = :customerId AND a.type = :type " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetEntity> findByTenantIdAndCustomerIdAndType(@Param("tenantId") String tenantId,
-                                                         @Param("customerId") String customerId,
+    Page<AssetEntity> findByTenantIdAndCustomerIdAndType(@Param("tenantId") UUID tenantId,
+                                                         @Param("customerId") UUID customerId,
                                                          @Param("type") String type,
                                                          @Param("textSearch") String textSearch,
                                                          Pageable pageable);
@@ -115,13 +115,13 @@ public interface AssetRepository extends PagingAndSortingRepository<AssetEntity,
             "AND a.customerId = :customerId " +
             "AND a.type = :type " +
             "AND LOWER(a.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<AssetInfoEntity> findAssetInfosByTenantIdAndCustomerIdAndType(@Param("tenantId") String tenantId,
-                                                                       @Param("customerId") String customerId,
+    Page<AssetInfoEntity> findAssetInfosByTenantIdAndCustomerIdAndType(@Param("tenantId") UUID tenantId,
+                                                                       @Param("customerId") UUID customerId,
                                                                        @Param("type") String type,
                                                                        @Param("textSearch") String textSearch,
                                                                        Pageable pageable);
 
     @Query("SELECT DISTINCT a.type FROM AssetEntity a WHERE a.tenantId = :tenantId")
-    List<String> findTenantAssetTypes(@Param("tenantId") String tenantId);
+    List<String> findTenantAssetTypes(@Param("tenantId") UUID tenantId);
 
 }

@@ -17,7 +17,6 @@ package org.thingsboard.server.dao.sql.asset;
 
 import com.google.common.util.concurrent.ListenableFuture;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.domain.PageRequest;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
 import org.thingsboard.server.common.data.EntitySubtype;
@@ -41,9 +40,6 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUIDs;
-
 /**
  * Created by Valerii Sosliuk on 5/19/2017.
  */
@@ -60,20 +56,20 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     }
 
     @Override
-    protected CrudRepository<AssetEntity, String> getCrudRepository() {
+    protected CrudRepository<AssetEntity, UUID> getCrudRepository() {
         return assetRepository;
     }
 
     @Override
     public AssetInfo findAssetInfoById(TenantId tenantId, UUID assetId) {
-        return DaoUtil.getData(assetRepository.findAssetInfoById(fromTimeUUID(assetId)));
+        return DaoUtil.getData(assetRepository.findAssetInfoById(assetId));
     }
 
     @Override
     public PageData<Asset> findAssetsByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(assetRepository
                 .findByTenantId(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }
@@ -82,7 +78,7 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     public PageData<AssetInfo> findAssetInfosByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 assetRepository.findAssetInfosByTenantId(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, AssetInfoEntity.assetInfoColumnMap)));
     }
@@ -90,15 +86,15 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     @Override
     public ListenableFuture<List<Asset>> findAssetsByTenantIdAndIdsAsync(UUID tenantId, List<UUID> assetIds) {
         return service.submit(() ->
-                DaoUtil.convertDataList(assetRepository.findByTenantIdAndIdIn(fromTimeUUID(tenantId), fromTimeUUIDs(assetIds))));
+                DaoUtil.convertDataList(assetRepository.findByTenantIdAndIdIn(tenantId, assetIds)));
     }
 
     @Override
     public PageData<Asset> findAssetsByTenantIdAndCustomerId(UUID tenantId, UUID customerId, PageLink pageLink) {
         return DaoUtil.toPageData(assetRepository
                 .findByTenantIdAndCustomerId(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }
@@ -107,8 +103,8 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     public PageData<AssetInfo> findAssetInfosByTenantIdAndCustomerId(UUID tenantId, UUID customerId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 assetRepository.findAssetInfosByTenantIdAndCustomerId(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, AssetInfoEntity.assetInfoColumnMap)));
     }
@@ -116,12 +112,12 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     @Override
     public ListenableFuture<List<Asset>> findAssetsByTenantIdAndCustomerIdAndIdsAsync(UUID tenantId, UUID customerId, List<UUID> assetIds) {
         return service.submit(() ->
-                DaoUtil.convertDataList(assetRepository.findByTenantIdAndCustomerIdAndIdIn(fromTimeUUID(tenantId), fromTimeUUID(customerId), fromTimeUUIDs(assetIds))));
+                DaoUtil.convertDataList(assetRepository.findByTenantIdAndCustomerIdAndIdIn(tenantId, customerId, assetIds)));
     }
 
     @Override
     public Optional<Asset> findAssetsByTenantIdAndName(UUID tenantId, String name) {
-        Asset asset = DaoUtil.getData(assetRepository.findByTenantIdAndName(fromTimeUUID(tenantId), name));
+        Asset asset = DaoUtil.getData(assetRepository.findByTenantIdAndName(tenantId, name));
         return Optional.ofNullable(asset);
     }
 
@@ -129,7 +125,7 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     public PageData<Asset> findAssetsByTenantIdAndType(UUID tenantId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(assetRepository
                 .findByTenantIdAndType(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
@@ -139,7 +135,7 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     public PageData<AssetInfo> findAssetInfosByTenantIdAndType(UUID tenantId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 assetRepository.findAssetInfosByTenantIdAndType(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, AssetInfoEntity.assetInfoColumnMap)));
@@ -149,8 +145,8 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     public PageData<Asset> findAssetsByTenantIdAndCustomerIdAndType(UUID tenantId, UUID customerId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(assetRepository
                 .findByTenantIdAndCustomerIdAndType(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
@@ -160,8 +156,8 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
     public PageData<AssetInfo> findAssetInfosByTenantIdAndCustomerIdAndType(UUID tenantId, UUID customerId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 assetRepository.findAssetInfosByTenantIdAndCustomerIdAndType(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, AssetInfoEntity.assetInfoColumnMap)));
@@ -169,7 +165,7 @@ public class JpaAssetDao extends JpaAbstractSearchTextDao<AssetEntity, Asset> im
 
     @Override
     public ListenableFuture<List<EntitySubtype>> findTenantAssetTypesAsync(UUID tenantId) {
-        return service.submit(() -> convertTenantAssetTypesToDto(tenantId, assetRepository.findTenantAssetTypes(fromTimeUUID(tenantId))));
+        return service.submit(() -> convertTenantAssetTypesToDto(tenantId, assetRepository.findTenantAssetTypes(tenantId)));
     }
 
     private List<EntitySubtype> convertTenantAssetTypesToDto(UUID tenantId, List<String> types) {

@@ -29,6 +29,7 @@ import org.thingsboard.server.dao.util.SqlDao;
 
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
+import java.sql.SQLType;
 import java.sql.Types;
 import java.util.ArrayList;
 import java.util.List;
@@ -92,7 +93,7 @@ public abstract class AttributeKvInsertRepository {
 
                         ps.setLong(6, kvEntity.getLastUpdateTs());
                         ps.setString(7, kvEntity.getId().getEntityType().name());
-                        ps.setString(8, kvEntity.getId().getEntityId());
+                        ps.setObject(8, kvEntity.getId().getEntityId());
                         ps.setString(9, kvEntity.getId().getAttributeType());
                         ps.setString(10, kvEntity.getId().getAttributeKey());
                     }
@@ -122,7 +123,7 @@ public abstract class AttributeKvInsertRepository {
                     public void setValues(PreparedStatement ps, int i) throws SQLException {
                         AttributeKvEntity kvEntity = insertEntities.get(i);
                         ps.setString(1, kvEntity.getId().getEntityType().name());
-                        ps.setString(2, kvEntity.getId().getEntityId());
+                        ps.setObject(2, kvEntity.getId().getEntityId());
                         ps.setString(3, kvEntity.getId().getAttributeType());
                         ps.setString(4, kvEntity.getId().getAttributeKey());
 

@@ -26,6 +26,7 @@ import org.thingsboard.server.dao.model.sql.AttributeKvEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 @SqlDao
 public interface AttributeKvRepository extends CrudRepository<AttributeKvEntity, AttributeKvCompositeKey> {
@@ -34,7 +35,7 @@ public interface AttributeKvRepository extends CrudRepository<AttributeKvEntity,
             "AND a.id.entityId = :entityId " +
             "AND a.id.attributeType = :attributeType")
     List<AttributeKvEntity> findAllByEntityTypeAndEntityIdAndAttributeType(@Param("entityType") EntityType entityType,
-                                                                           @Param("entityId") String entityId,
+                                                                           @Param("entityId") UUID entityId,
                                                                            @Param("attributeType") String attributeType);
 
     @Transactional
@@ -44,7 +45,7 @@ public interface AttributeKvRepository extends CrudRepository<AttributeKvEntity,
             "AND a.id.attributeType = :attributeType " +
             "AND a.id.attributeKey = :attributeKey")
     void delete(@Param("entityType") EntityType entityType,
-                @Param("entityId") String entityId,
+                @Param("entityId") UUID entityId,
                 @Param("attributeType") String attributeType,
                 @Param("attributeKey") String attributeKey);
 }

@@ -46,7 +46,7 @@ public class HsqlAttributesInsertRepository extends AttributeKvInsertRepository
         entities.forEach(entity -> {
             jdbcTemplate.update(INSERT_OR_UPDATE, ps -> {
                 ps.setString(1, entity.getId().getEntityType().name());
-                ps.setString(2, entity.getId().getEntityId());
+                ps.setObject(2, entity.getId().getEntityId());
                 ps.setString(3, entity.getId().getAttributeType());
                 ps.setString(4, entity.getId().getAttributeKey());
                 ps.setString(5, entity.getStrValue());

@@ -22,7 +22,6 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.kv.AttributeKvEntry;
@@ -43,8 +42,6 @@ import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-
 @Component
 @Slf4j
 @SqlDao
@@ -115,14 +112,14 @@ public class JpaAttributeDao extends JpaAbstractDaoListeningExecutorService impl
                 DaoUtil.convertDataList(Lists.newArrayList(
                         attributeKvRepository.findAllByEntityTypeAndEntityIdAndAttributeType(
                                 entityId.getEntityType(),
-                                UUIDConverter.fromTimeUUID(entityId.getId()),
+                                entityId.getId(),
                                 attributeType))));
     }
 
     @Override
     public ListenableFuture<Void> save(TenantId tenantId, EntityId entityId, String attributeType, AttributeKvEntry attribute) {
         AttributeKvEntity entity = new AttributeKvEntity();
-        entity.setId(new AttributeKvCompositeKey(entityId.getEntityType(), fromTimeUUID(entityId.getId()), attributeType, attribute.getKey()));
+        entity.setId(new AttributeKvCompositeKey(entityId.getEntityType(), entityId.getId(), attributeType, attribute.getKey()));
         entity.setLastUpdateTs(attribute.getLastUpdateTs());
         entity.setStrValue(attribute.getStrValue().orElse(null));
         entity.setDoubleValue(attribute.getDoubleValue().orElse(null));
@@ -140,7 +137,7 @@ public class JpaAttributeDao extends JpaAbstractDaoListeningExecutorService impl
     public ListenableFuture<List<Void>> removeAll(TenantId tenantId, EntityId entityId, String attributeType, List<String> keys) {
         return service.submit(() -> {
             keys.forEach(key ->
-                    attributeKvRepository.delete(entityId.getEntityType(), UUIDConverter.fromTimeUUID(entityId.getId()), attributeType, key)
+                    attributeKvRepository.delete(entityId.getEntityType(), entityId.getId(), attributeType, key)
             );
             return null;
         });
@@ -149,7 +146,7 @@ public class JpaAttributeDao extends JpaAbstractDaoListeningExecutorService impl
     private AttributeKvCompositeKey getAttributeKvCompositeKey(EntityId entityId, String attributeType, String attributeKey) {
         return new AttributeKvCompositeKey(
                 entityId.getEntityType(),
-                fromTimeUUID(entityId.getId()),
+                entityId.getId(),
                 attributeType,
                 attributeKey);
     }

@@ -25,8 +25,9 @@ import org.thingsboard.server.common.data.audit.ActionType;
 import org.thingsboard.server.dao.model.sql.AuditLogEntity;
 
 import java.util.List;
+import java.util.UUID;
 
-public interface AuditLogRepository extends PagingAndSortingRepository<AuditLogEntity, String> {
+public interface AuditLogRepository extends PagingAndSortingRepository<AuditLogEntity, UUID> {
 
     @Query("SELECT a FROM AuditLogEntity a WHERE " +
             "a.tenantId = :tenantId " +
@@ -40,7 +41,7 @@ public interface AuditLogRepository extends PagingAndSortingRepository<AuditLogE
             "OR LOWER(a.actionStatus) LIKE LOWER(CONCAT(:textSearch, '%')))"
     )
     Page<AuditLogEntity> findByTenantId(
-                                 @Param("tenantId") String tenantId,
+                                 @Param("tenantId") UUID tenantId,
                                  @Param("textSearch") String textSearch,
                                  @Param("startId") String startId,
                                  @Param("endId") String endId,
@@ -58,9 +59,9 @@ public interface AuditLogRepository extends PagingAndSortingRepository<AuditLogE
             "OR LOWER(a.actionType) LIKE LOWER(CONCAT(:textSearch, '%'))" +
             "OR LOWER(a.actionStatus) LIKE LOWER(CONCAT(:textSearch, '%')))"
     )
-    Page<AuditLogEntity> findAuditLogsByTenantIdAndEntityId(@Param("tenantId") String tenantId,
+    Page<AuditLogEntity> findAuditLogsByTenantIdAndEntityId(@Param("tenantId") UUID tenantId,
                                                             @Param("entityType") EntityType entityType,
-                                                            @Param("entityId") String entityId,
+                                                            @Param("entityId") UUID entityId,
                                                             @Param("textSearch") String textSearch,
                                                             @Param("startId") String startId,
                                                             @Param("endId") String endId,
@@ -79,8 +80,8 @@ public interface AuditLogRepository extends PagingAndSortingRepository<AuditLogE
             "OR LOWER(a.actionType) LIKE LOWER(CONCAT(:textSearch, '%'))" +
             "OR LOWER(a.actionStatus) LIKE LOWER(CONCAT(:textSearch, '%')))"
     )
-    Page<AuditLogEntity> findAuditLogsByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                              @Param("customerId") String customerId,
+    Page<AuditLogEntity> findAuditLogsByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                              @Param("customerId") UUID customerId,
                                                               @Param("textSearch") String textSearch,
                                                               @Param("startId") String startId,
                                                               @Param("endId") String endId,
@@ -98,8 +99,8 @@ public interface AuditLogRepository extends PagingAndSortingRepository<AuditLogE
             "OR LOWER(a.actionType) LIKE LOWER(CONCAT(:textSearch, '%'))" +
             "OR LOWER(a.actionStatus) LIKE LOWER(CONCAT(:textSearch, '%')))"
     )
-    Page<AuditLogEntity> findAuditLogsByTenantIdAndUserId(@Param("tenantId") String tenantId,
-                                                          @Param("userId") String userId,
+    Page<AuditLogEntity> findAuditLogsByTenantIdAndUserId(@Param("tenantId") UUID tenantId,
+                                                          @Param("userId") UUID userId,
                                                           @Param("textSearch") String textSearch,
                                                           @Param("startId") String startId,
                                                           @Param("endId") String endId,

@@ -36,7 +36,6 @@ import java.util.List;
 import java.util.Objects;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
 import static org.thingsboard.server.dao.DaoUtil.endTimeToId;
 import static org.thingsboard.server.dao.DaoUtil.startTimeToId;
 
@@ -53,7 +52,7 @@ public class JpaAuditLogDao extends JpaAbstractDao<AuditLogEntity, AuditLog> imp
     }
 
     @Override
-    protected CrudRepository<AuditLogEntity, String> getCrudRepository() {
+    protected CrudRepository<AuditLogEntity, UUID> getCrudRepository() {
         return auditLogRepository;
     }
 
@@ -70,9 +69,9 @@ public class JpaAuditLogDao extends JpaAbstractDao<AuditLogEntity, AuditLog> imp
         return DaoUtil.toPageData(
                 auditLogRepository
                         .findAuditLogsByTenantIdAndEntityId(
-                                fromTimeUUID(tenantId),
+                                tenantId,
                                 entityId.getEntityType(),
-                                fromTimeUUID(entityId.getId()),
+                                entityId.getId(),
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 startTimeToId(pageLink.getStartTime()),
                                 endTimeToId(pageLink.getEndTime()),
@@ -85,8 +84,8 @@ public class JpaAuditLogDao extends JpaAbstractDao<AuditLogEntity, AuditLog> imp
         return DaoUtil.toPageData(
                 auditLogRepository
                         .findAuditLogsByTenantIdAndCustomerId(
-                                fromTimeUUID(tenantId),
-                                fromTimeUUID(customerId.getId()),
+                                tenantId,
+                                customerId.getId(),
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 startTimeToId(pageLink.getStartTime()),
                                 endTimeToId(pageLink.getEndTime()),
@@ -99,8 +98,8 @@ public class JpaAuditLogDao extends JpaAbstractDao<AuditLogEntity, AuditLog> imp
         return DaoUtil.toPageData(
                 auditLogRepository
                         .findAuditLogsByTenantIdAndUserId(
-                                fromTimeUUID(tenantId),
-                                fromTimeUUID(userId.getId()),
+                                tenantId,
+                                userId.getId(),
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 startTimeToId(pageLink.getStartTime()),
                                 endTimeToId(pageLink.getEndTime()),
@@ -112,7 +111,7 @@ public class JpaAuditLogDao extends JpaAbstractDao<AuditLogEntity, AuditLog> imp
     public PageData<AuditLog> findAuditLogsByTenantId(UUID tenantId, List<ActionType> actionTypes, TimePageLink pageLink) {
         return DaoUtil.toPageData(
                 auditLogRepository.findByTenantId(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         startTimeToId(pageLink.getStartTime()),
                         endTimeToId(pageLink.getEndTime()),

@@ -23,7 +23,6 @@ import org.springframework.transaction.PlatformTransactionManager;
 import org.springframework.transaction.TransactionDefinition;
 import org.springframework.transaction.TransactionStatus;
 import org.springframework.transaction.support.DefaultTransactionDefinition;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.dao.model.sql.ComponentDescriptorEntity;
 
 import javax.persistence.EntityManager;
@@ -69,7 +68,8 @@ public abstract class AbstractComponentDescriptorInsertRepository implements Com
 
     protected Query getQuery(ComponentDescriptorEntity entity, String query) {
         return entityManager.createNativeQuery(query, ComponentDescriptorEntity.class)
-                .setParameter("id", UUIDConverter.fromTimeUUID(entity.getUuid()))
+                .setParameter("id", entity.getUuid())
+                .setParameter("created_time", entity.getCreatedTime())
                 .setParameter("actions", entity.getActions())
                 .setParameter("clazz", entity.getClazz())
                 .setParameter("configuration_descriptor", entity.getConfigurationDescriptor().toString())

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.component;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.common.data.plugin.ComponentScope;
@@ -26,13 +25,13 @@ import org.thingsboard.server.common.data.plugin.ComponentType;
 import org.thingsboard.server.dao.model.sql.ComponentDescriptorEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
 @SqlDao
-public interface ComponentDescriptorRepository extends PagingAndSortingRepository<ComponentDescriptorEntity, String> {
+public interface ComponentDescriptorRepository extends PagingAndSortingRepository<ComponentDescriptorEntity, UUID> {
 
     ComponentDescriptorEntity findByClazz(String clazz);
 

@@ -16,17 +16,18 @@
 package org.thingsboard.server.dao.sql.component;
 
 import org.springframework.stereotype.Repository;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.dao.model.sql.ComponentDescriptorEntity;
 import org.thingsboard.server.dao.util.HsqlDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import javax.persistence.Query;
+
 @SqlDao
 @HsqlDao
 @Repository
 public class HsqlComponentDescriptorInsertRepository extends AbstractComponentDescriptorInsertRepository {
 
-    private static final String P_KEY_CONFLICT_STATEMENT = "(component_descriptor.id=I.id)";
+    private static final String P_KEY_CONFLICT_STATEMENT = "(component_descriptor.id=UUID(I.id))";
     private static final String UNQ_KEY_CONFLICT_STATEMENT = "(component_descriptor.clazz=I.clazz)";
 
     private static final String INSERT_OR_UPDATE_ON_P_KEY_CONFLICT = getInsertString(P_KEY_CONFLICT_STATEMENT);
@@ -38,13 +39,29 @@ public class HsqlComponentDescriptorInsertRepository extends AbstractComponentDe
     }
 
     @Override
+    protected Query getQuery(ComponentDescriptorEntity entity, String query) {
+        return entityManager.createNativeQuery(query, ComponentDescriptorEntity.class)
+                .setParameter("id", entity.getUuid().toString())
+                .setParameter("created_time", entity.getCreatedTime())
+                .setParameter("actions", entity.getActions())
+                .setParameter("clazz", entity.getClazz())
+                .setParameter("configuration_descriptor", entity.getConfigurationDescriptor().toString())
+                .setParameter("name", entity.getName())
+                .setParameter("scope", entity.getScope().name())
+                .setParameter("search_text", entity.getSearchText())
+                .setParameter("type", entity.getType().name());
+    }
+
+    @Override
     protected ComponentDescriptorEntity doProcessSaveOrUpdate(ComponentDescriptorEntity entity, String query) {
         getQuery(entity, query).executeUpdate();
-        return entityManager.find(ComponentDescriptorEntity.class, UUIDConverter.fromTimeUUID(entity.getUuid()));
+        return entityManager.find(ComponentDescriptorEntity.class, entity.getUuid());
     }
 
     private static String getInsertString(String conflictStatement) {
-        return "MERGE INTO component_descriptor USING (VALUES :id, :actions, :clazz, :configuration_descriptor, :name, :scope, :search_text, :type) I (id, actions, clazz, configuration_descriptor, name, scope, search_text, type) ON " + conflictStatement + " WHEN MATCHED THEN UPDATE SET component_descriptor.id = I.id, component_descriptor.actions = I.actions, component_descriptor.clazz = I.clazz, component_descriptor.configuration_descriptor = I.configuration_descriptor, component_descriptor.name = I.name, component_descriptor.scope = I.scope, component_descriptor.search_text = I.search_text, component_descriptor.type = I.type" +
-                " WHEN NOT MATCHED THEN INSERT (id, actions, clazz, configuration_descriptor, name, scope, search_text, type) VALUES (I.id, I.actions, I.clazz, I.configuration_descriptor, I.name, I.scope, I.search_text, I.type)";
+        return "MERGE INTO component_descriptor USING (VALUES :id, :created_time, :actions, :clazz, :configuration_descriptor, :name, :scope, :search_text, :type) I (id, created_time, actions, clazz, configuration_descriptor, name, scope, search_text, type) ON "
+                + conflictStatement
+                + " WHEN MATCHED THEN UPDATE SET component_descriptor.id = UUID(I.id), component_descriptor.actions = I.actions, component_descriptor.clazz = I.clazz, component_descriptor.configuration_descriptor = I.configuration_descriptor, component_descriptor.name = I.name, component_descriptor.scope = I.scope, component_descriptor.search_text = I.search_text, component_descriptor.type = I.type" +
+                " WHEN NOT MATCHED THEN INSERT (id, created_time, actions, clazz, configuration_descriptor, name, scope, search_text, type) VALUES (UUID(I.id), I.created_time, I.actions, I.clazz, I.configuration_descriptor, I.name, I.scope, I.search_text, I.type)";
     }
 }

@@ -20,7 +20,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.ComponentDescriptorId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
@@ -36,6 +35,7 @@ import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.Objects;
 import java.util.Optional;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
@@ -57,16 +57,18 @@ public class JpaBaseComponentDescriptorDao extends JpaAbstractSearchTextDao<Comp
     }
 
     @Override
-    protected CrudRepository<ComponentDescriptorEntity, String> getCrudRepository() {
+    protected CrudRepository<ComponentDescriptorEntity, UUID> getCrudRepository() {
         return componentDescriptorRepository;
     }
 
     @Override
     public Optional<ComponentDescriptor> saveIfNotExist(TenantId tenantId, ComponentDescriptor component) {
         if (component.getId() == null) {
-            component.setId(new ComponentDescriptorId(Uuids.timeBased()));
+            UUID uuid = Uuids.timeBased();
+            component.setId(new ComponentDescriptorId(uuid));
+            component.setCreatedTime(Uuids.unixTimestamp(uuid));
         }
-        if (!componentDescriptorRepository.existsById(UUIDConverter.fromTimeUUID(component.getId().getId()))) {
+        if (!componentDescriptorRepository.existsById(component.getId().getId())) {
             ComponentDescriptorEntity componentDescriptorEntity = new ComponentDescriptorEntity(component);
             ComponentDescriptorEntity savedEntity = componentDescriptorInsertRepository.saveOrUpdate(componentDescriptorEntity);
             return Optional.of(savedEntity.toData());

@@ -19,7 +19,6 @@ import org.springframework.stereotype.Repository;
 import org.thingsboard.server.dao.model.sql.ComponentDescriptorEntity;
 import org.thingsboard.server.dao.util.PsqlDao;
 import org.thingsboard.server.dao.util.SqlDao;
-import org.thingsboard.server.dao.util.SqlTsDao;
 
 @SqlDao
 @PsqlDao
@@ -49,10 +48,10 @@ public class PsqlComponentDescriptorInsertRepository extends AbstractComponentDe
     }
 
     private static String getInsertOrUpdateStatement(String conflictKeyStatement, String updateKeyStatement) {
-        return "INSERT INTO component_descriptor (id, actions, clazz, configuration_descriptor, name, scope, search_text, type) VALUES (:id, :actions, :clazz, :configuration_descriptor, :name, :scope, :search_text, :type) ON CONFLICT " + conflictKeyStatement + " DO UPDATE SET " + updateKeyStatement + " returning *";
+        return "INSERT INTO component_descriptor (id, created_time, actions, clazz, configuration_descriptor, name, scope, search_text, type) VALUES (:id, :created_time, :actions, :clazz, :configuration_descriptor, :name, :scope, :search_text, :type) ON CONFLICT " + conflictKeyStatement + " DO UPDATE SET " + updateKeyStatement + " returning *";
     }
 
     private static String getUpdateStatement(String id) {
-        return "actions = :actions, " + id + ", configuration_descriptor = :configuration_descriptor, name = :name, scope = :scope, search_text = :search_text, type = :type";
+        return "actions = :actions, " + id + ",created_time = :created_time, configuration_descriptor = :configuration_descriptor, name = :name, scope = :scope, search_text = :search_text, type = :type";
     }
 }

@@ -18,26 +18,25 @@ package org.thingsboard.server.dao.sql.customer;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.CustomerEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
 @SqlDao
-public interface CustomerRepository extends PagingAndSortingRepository<CustomerEntity, String> {
+public interface CustomerRepository extends PagingAndSortingRepository<CustomerEntity, UUID> {
 
     @Query("SELECT c FROM CustomerEntity c WHERE c.tenantId = :tenantId " +
             "AND LOWER(c.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<CustomerEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<CustomerEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                         @Param("textSearch") String textSearch,
                                         Pageable pageable);
 
-    CustomerEntity findByTenantIdAndTitle(String tenantId, String title);
+    CustomerEntity findByTenantIdAndTitle(UUID tenantId, String title);
 
 }

@@ -19,7 +19,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
 import org.thingsboard.server.common.data.Customer;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.dao.DaoUtil;
@@ -48,21 +47,21 @@ public class JpaCustomerDao extends JpaAbstractSearchTextDao<CustomerEntity, Cus
     }
 
     @Override
-    protected CrudRepository<CustomerEntity, String> getCrudRepository() {
+    protected CrudRepository<CustomerEntity, UUID> getCrudRepository() {
         return customerRepository;
     }
 
     @Override
     public PageData<Customer> findCustomersByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(customerRepository.findByTenantId(
-                UUIDConverter.fromTimeUUID(tenantId),
+                tenantId,
                 Objects.toString(pageLink.getTextSearch(), ""),
                 DaoUtil.toPageable(pageLink)));
     }
 
     @Override
     public Optional<Customer> findCustomersByTenantIdAndTitle(UUID tenantId, String title) {
-        Customer customer = DaoUtil.getData(customerRepository.findByTenantIdAndTitle(UUIDConverter.fromTimeUUID(tenantId), title));
+        Customer customer = DaoUtil.getData(customerRepository.findByTenantIdAndTitle(tenantId, title));
         return Optional.ofNullable(customer);
     }
 }

@@ -18,23 +18,22 @@ package org.thingsboard.server.dao.sql.dashboard;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.DashboardInfoEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
 @SqlDao
-public interface DashboardInfoRepository extends PagingAndSortingRepository<DashboardInfoEntity, String> {
+public interface DashboardInfoRepository extends PagingAndSortingRepository<DashboardInfoEntity, UUID> {
 
     @Query("SELECT di FROM DashboardInfoEntity di WHERE di.tenantId = :tenantId " +
             "AND LOWER(di.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<DashboardInfoEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<DashboardInfoEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                              @Param("searchText") String searchText,
                                              Pageable pageable);
 
@@ -42,8 +41,8 @@ public interface DashboardInfoRepository extends PagingAndSortingRepository<Dash
             "AND di.id = re.toId AND re.toType = 'DASHBOARD' AND re.relationTypeGroup = 'DASHBOARD' " +
             "AND re.relationType = 'Contains' AND re.fromId = :customerId AND re.fromType = 'CUSTOMER' " +
             "AND LOWER(di.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<DashboardInfoEntity> findByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                          @Param("customerId") String customerId,
+    Page<DashboardInfoEntity> findByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                          @Param("customerId") UUID customerId,
                                                           @Param("searchText") String searchText,
                                                           Pageable pageable);
 

@@ -19,9 +19,11 @@ import org.springframework.data.repository.CrudRepository;
 import org.thingsboard.server.dao.model.sql.DashboardEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import java.util.UUID;
+
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
 @SqlDao
-public interface DashboardRepository extends CrudRepository<DashboardEntity, String> {
+public interface DashboardRepository extends CrudRepository<DashboardEntity, UUID> {
 }

@@ -24,6 +24,8 @@ import org.thingsboard.server.dao.model.sql.DashboardEntity;
 import org.thingsboard.server.dao.sql.JpaAbstractSearchTextDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import java.util.UUID;
+
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
@@ -40,7 +42,7 @@ public class JpaDashboardDao extends JpaAbstractSearchTextDao<DashboardEntity, D
     }
 
     @Override
-    protected CrudRepository<DashboardEntity, String> getCrudRepository() {
+    protected CrudRepository<DashboardEntity, UUID> getCrudRepository() {
         return dashboardRepository;
     }
 }

@@ -20,7 +20,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
 import org.thingsboard.server.common.data.DashboardInfo;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.dao.DaoUtil;
@@ -61,7 +60,7 @@ public class JpaDashboardInfoDao extends JpaAbstractSearchTextDao<DashboardInfoE
     public PageData<DashboardInfo> findDashboardsByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(dashboardInfoRepository
                 .findByTenantId(
-                        UUIDConverter.fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }
@@ -70,8 +69,8 @@ public class JpaDashboardInfoDao extends JpaAbstractSearchTextDao<DashboardInfoE
     public PageData<DashboardInfo> findDashboardsByTenantIdAndCustomerId(UUID tenantId, UUID customerId, PageLink pageLink) {
         return DaoUtil.toPageData(dashboardInfoRepository
                 .findByTenantIdAndCustomerId(
-                        UUIDConverter.fromTimeUUID(tenantId),
-                        UUIDConverter.fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }

@@ -19,13 +19,15 @@ import org.springframework.data.repository.CrudRepository;
 import org.thingsboard.server.dao.model.sql.DeviceCredentialsEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import java.util.UUID;
+
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
 @SqlDao
-public interface DeviceCredentialsRepository extends CrudRepository<DeviceCredentialsEntity, String> {
+public interface DeviceCredentialsRepository extends CrudRepository<DeviceCredentialsEntity, UUID> {
 
-    DeviceCredentialsEntity findByDeviceId(String deviceId);
+    DeviceCredentialsEntity findByDeviceId(UUID deviceId);
 
     DeviceCredentialsEntity findByCredentialsId(String credentialsId);
 }

@@ -25,24 +25,25 @@ import org.thingsboard.server.dao.model.sql.DeviceInfoEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
 @SqlDao
-public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntity, String> {
+public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntity, UUID> {
 
     @Query("SELECT new org.thingsboard.server.dao.model.sql.DeviceInfoEntity(d, c.title, c.additionalInfo) " +
             "FROM DeviceEntity d " +
             "LEFT JOIN CustomerEntity c on c.id = d.customerId " +
             "WHERE d.id = :deviceId")
-    DeviceInfoEntity findDeviceInfoById(@Param("deviceId") String deviceId);
+    DeviceInfoEntity findDeviceInfoById(@Param("deviceId") UUID deviceId);
 
     @Query("SELECT d FROM DeviceEntity d WHERE d.tenantId = :tenantId " +
             "AND d.customerId = :customerId " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<DeviceEntity> findByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                   @Param("customerId") String customerId,
+    Page<DeviceEntity> findByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                   @Param("customerId") UUID customerId,
                                                    @Param("searchText") String searchText,
                                                    Pageable pageable);
 
@@ -52,18 +53,18 @@ public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntit
             "WHERE d.tenantId = :tenantId " +
             "AND d.customerId = :customerId " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<DeviceInfoEntity> findDeviceInfosByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                   @Param("customerId") String customerId,
+    Page<DeviceInfoEntity> findDeviceInfosByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                   @Param("customerId") UUID customerId,
                                                    @Param("searchText") String searchText,
                                                    Pageable pageable);
 
     @Query("SELECT d FROM DeviceEntity d WHERE d.tenantId = :tenantId")
-    Page<DeviceEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<DeviceEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                       Pageable pageable);
 
     @Query("SELECT d FROM DeviceEntity d WHERE d.tenantId = :tenantId " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<DeviceEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<DeviceEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                       @Param("textSearch") String textSearch,
                                       Pageable pageable);
 
@@ -72,14 +73,14 @@ public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntit
             "LEFT JOIN CustomerEntity c on c.id = d.customerId " +
             "WHERE d.tenantId = :tenantId " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<DeviceInfoEntity> findDeviceInfosByTenantId(@Param("tenantId") String tenantId,
+    Page<DeviceInfoEntity> findDeviceInfosByTenantId(@Param("tenantId") UUID tenantId,
                                                      @Param("textSearch") String textSearch,
                                                      Pageable pageable);
 
     @Query("SELECT d FROM DeviceEntity d WHERE d.tenantId = :tenantId " +
             "AND d.type = :type " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<DeviceEntity> findByTenantIdAndType(@Param("tenantId") String tenantId,
+    Page<DeviceEntity> findByTenantIdAndType(@Param("tenantId") UUID tenantId,
                                              @Param("type") String type,
                                              @Param("textSearch") String textSearch,
                                              Pageable pageable);
@@ -90,7 +91,7 @@ public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntit
             "WHERE d.tenantId = :tenantId " +
             "AND d.type = :type " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<DeviceInfoEntity> findDeviceInfosByTenantIdAndType(@Param("tenantId") String tenantId,
+    Page<DeviceInfoEntity> findDeviceInfosByTenantIdAndType(@Param("tenantId") UUID tenantId,
                                              @Param("type") String type,
                                              @Param("textSearch") String textSearch,
                                              Pageable pageable);
@@ -99,8 +100,8 @@ public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntit
             "AND d.customerId = :customerId " +
             "AND d.type = :type " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<DeviceEntity> findByTenantIdAndCustomerIdAndType(@Param("tenantId") String tenantId,
-                                                          @Param("customerId") String customerId,
+    Page<DeviceEntity> findByTenantIdAndCustomerIdAndType(@Param("tenantId") UUID tenantId,
+                                                          @Param("customerId") UUID customerId,
                                                           @Param("type") String type,
                                                           @Param("textSearch") String textSearch,
                                                           Pageable pageable);
@@ -112,18 +113,18 @@ public interface DeviceRepository extends PagingAndSortingRepository<DeviceEntit
             "AND d.customerId = :customerId " +
             "AND d.type = :type " +
             "AND LOWER(d.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<DeviceInfoEntity> findDeviceInfosByTenantIdAndCustomerIdAndType(@Param("tenantId") String tenantId,
-                                                          @Param("customerId") String customerId,
+    Page<DeviceInfoEntity> findDeviceInfosByTenantIdAndCustomerIdAndType(@Param("tenantId") UUID tenantId,
+                                                          @Param("customerId") UUID customerId,
                                                           @Param("type") String type,
                                                           @Param("textSearch") String textSearch,
                                                           Pageable pageable);
 
     @Query("SELECT DISTINCT d.type FROM DeviceEntity d WHERE d.tenantId = :tenantId")
-    List<String> findTenantDeviceTypes(@Param("tenantId") String tenantId);
+    List<String> findTenantDeviceTypes(@Param("tenantId") UUID tenantId);
 
-    DeviceEntity findByTenantIdAndName(String tenantId, String name);
+    DeviceEntity findByTenantIdAndName(UUID tenantId, String name);
 
-    List<DeviceEntity> findDevicesByTenantIdAndCustomerIdAndIdIn(String tenantId, String customerId, List<String> deviceIds);
+    List<DeviceEntity> findDevicesByTenantIdAndCustomerIdAndIdIn(UUID tenantId, UUID customerId, List<UUID> deviceIds);
 
-    List<DeviceEntity> findDevicesByTenantIdAndIdIn(String tenantId, List<String> deviceIds);
+    List<DeviceEntity> findDevicesByTenantIdAndIdIn(UUID tenantId, List<UUID> deviceIds);
 }

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.device;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.security.DeviceCredentials;
 import org.thingsboard.server.dao.DaoUtil;
@@ -45,13 +44,13 @@ public class JpaDeviceCredentialsDao extends JpaAbstractDao<DeviceCredentialsEnt
     }
 
     @Override
-    protected CrudRepository<DeviceCredentialsEntity, String> getCrudRepository() {
+    protected CrudRepository<DeviceCredentialsEntity, UUID> getCrudRepository() {
         return deviceCredentialsRepository;
     }
 
     @Override
     public DeviceCredentials findByDeviceId(TenantId tenantId, UUID deviceId) {
-        return DaoUtil.getData(deviceCredentialsRepository.findByDeviceId(UUIDConverter.fromTimeUUID(deviceId)));
+        return DaoUtil.getData(deviceCredentialsRepository.findByDeviceId(deviceId));
     }
 
     @Override

@@ -24,7 +24,6 @@ import org.thingsboard.server.common.data.Device;
 import org.thingsboard.server.common.data.DeviceInfo;
 import org.thingsboard.server.common.data.EntitySubtype;
 import org.thingsboard.server.common.data.EntityType;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
@@ -42,9 +41,6 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUIDs;
-
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
@@ -61,13 +57,13 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     }
 
     @Override
-    protected CrudRepository<DeviceEntity, String> getCrudRepository() {
+    protected CrudRepository<DeviceEntity, UUID> getCrudRepository() {
         return deviceRepository;
     }
 
     @Override
     public DeviceInfo findDeviceInfoById(TenantId tenantId, UUID deviceId) {
-        return DaoUtil.getData(deviceRepository.findDeviceInfoById(fromTimeUUID(deviceId)));
+        return DaoUtil.getData(deviceRepository.findDeviceInfoById(deviceId));
     }
 
     @Override
@@ -75,12 +71,12 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
         if (StringUtils.isEmpty(pageLink.getTextSearch())) {
             return DaoUtil.toPageData(
                     deviceRepository.findByTenantId(
-                            fromTimeUUID(tenantId),
+                            tenantId,
                             DaoUtil.toPageable(pageLink)));
         } else {
             return DaoUtil.toPageData(
                     deviceRepository.findByTenantId(
-                            fromTimeUUID(tenantId),
+                            tenantId,
                             Objects.toString(pageLink.getTextSearch(), ""),
                             DaoUtil.toPageable(pageLink)));
         }
@@ -90,22 +86,22 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     public PageData<DeviceInfo> findDeviceInfosByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findDeviceInfosByTenantId(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, DeviceInfoEntity.deviceInfoColumnMap)));
     }
 
     @Override
     public ListenableFuture<List<Device>> findDevicesByTenantIdAndIdsAsync(UUID tenantId, List<UUID> deviceIds) {
-        return service.submit(() -> DaoUtil.convertDataList(deviceRepository.findDevicesByTenantIdAndIdIn(UUIDConverter.fromTimeUUID(tenantId), fromTimeUUIDs(deviceIds))));
+        return service.submit(() -> DaoUtil.convertDataList(deviceRepository.findDevicesByTenantIdAndIdIn(tenantId, deviceIds)));
     }
 
     @Override
     public PageData<Device> findDevicesByTenantIdAndCustomerId(UUID tenantId, UUID customerId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findByTenantIdAndCustomerId(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }
@@ -114,8 +110,8 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     public PageData<DeviceInfo> findDeviceInfosByTenantIdAndCustomerId(UUID tenantId, UUID customerId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findDeviceInfosByTenantIdAndCustomerId(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, DeviceInfoEntity.deviceInfoColumnMap)));
     }
@@ -123,12 +119,12 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     @Override
     public ListenableFuture<List<Device>> findDevicesByTenantIdCustomerIdAndIdsAsync(UUID tenantId, UUID customerId, List<UUID> deviceIds) {
         return service.submit(() -> DaoUtil.convertDataList(
-                deviceRepository.findDevicesByTenantIdAndCustomerIdAndIdIn(fromTimeUUID(tenantId), fromTimeUUID(customerId), fromTimeUUIDs(deviceIds))));
+                deviceRepository.findDevicesByTenantIdAndCustomerIdAndIdIn(tenantId, customerId, deviceIds)));
     }
 
     @Override
     public Optional<Device> findDeviceByTenantIdAndName(UUID tenantId, String name) {
-        Device device = DaoUtil.getData(deviceRepository.findByTenantIdAndName(fromTimeUUID(tenantId), name));
+        Device device = DaoUtil.getData(deviceRepository.findByTenantIdAndName(tenantId, name));
         return Optional.ofNullable(device);
     }
 
@@ -136,7 +132,7 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     public PageData<Device> findDevicesByTenantIdAndType(UUID tenantId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findByTenantIdAndType(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
@@ -146,7 +142,7 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     public PageData<DeviceInfo> findDeviceInfosByTenantIdAndType(UUID tenantId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findDeviceInfosByTenantIdAndType(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, DeviceInfoEntity.deviceInfoColumnMap)));
@@ -156,8 +152,8 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     public PageData<Device> findDevicesByTenantIdAndCustomerIdAndType(UUID tenantId, UUID customerId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findByTenantIdAndCustomerIdAndType(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
@@ -167,8 +163,8 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
     public PageData<DeviceInfo> findDeviceInfosByTenantIdAndCustomerIdAndType(UUID tenantId, UUID customerId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 deviceRepository.findDeviceInfosByTenantIdAndCustomerIdAndType(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, DeviceInfoEntity.deviceInfoColumnMap)));
@@ -176,7 +172,7 @@ public class JpaDeviceDao extends JpaAbstractSearchTextDao<DeviceEntity, Device>
 
     @Override
     public ListenableFuture<List<EntitySubtype>> findTenantDeviceTypesAsync(UUID tenantId) {
-        return service.submit(() -> convertTenantDeviceTypesToDto(tenantId, deviceRepository.findTenantDeviceTypes(fromTimeUUID(tenantId))));
+        return service.submit(() -> convertTenantDeviceTypesToDto(tenantId, deviceRepository.findTenantDeviceTypes(tenantId)));
     }
 
     private List<EntitySubtype> convertTenantDeviceTypesToDto(UUID tenantId, List<String> types) {

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.entityview;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.EntityViewEntity;
@@ -26,22 +25,23 @@ import org.thingsboard.server.dao.model.sql.EntityViewInfoEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Victor Basanets on 8/31/2017.
  */
 @SqlDao
-public interface EntityViewRepository extends PagingAndSortingRepository<EntityViewEntity, String> {
+public interface EntityViewRepository extends PagingAndSortingRepository<EntityViewEntity, UUID> {
 
     @Query("SELECT new org.thingsboard.server.dao.model.sql.EntityViewInfoEntity(e, c.title, c.additionalInfo) " +
             "FROM EntityViewEntity e " +
             "LEFT JOIN CustomerEntity c on c.id = e.customerId " +
             "WHERE e.id = :entityViewId")
-    EntityViewInfoEntity findEntityViewInfoById(@Param("entityViewId") String entityViewId);
+    EntityViewInfoEntity findEntityViewInfoById(@Param("entityViewId") UUID entityViewId);
 
     @Query("SELECT e FROM EntityViewEntity e WHERE e.tenantId = :tenantId " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<EntityViewEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<EntityViewEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                           @Param("textSearch") String textSearch,
                                           Pageable pageable);
 
@@ -50,14 +50,14 @@ public interface EntityViewRepository extends PagingAndSortingRepository<EntityV
             "LEFT JOIN CustomerEntity c on c.id = e.customerId " +
             "WHERE e.tenantId = :tenantId " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<EntityViewInfoEntity> findEntityViewInfosByTenantId(@Param("tenantId") String tenantId,
+    Page<EntityViewInfoEntity> findEntityViewInfosByTenantId(@Param("tenantId") UUID tenantId,
                                                              @Param("textSearch") String textSearch,
                                                              Pageable pageable);
 
     @Query("SELECT e FROM EntityViewEntity e WHERE e.tenantId = :tenantId " +
             "AND e.type = :type " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<EntityViewEntity> findByTenantIdAndType(@Param("tenantId") String tenantId,
+    Page<EntityViewEntity> findByTenantIdAndType(@Param("tenantId") UUID tenantId,
                                                  @Param("type") String type,
                                                  @Param("textSearch") String textSearch,
                                                  Pageable pageable);
@@ -68,7 +68,7 @@ public interface EntityViewRepository extends PagingAndSortingRepository<EntityV
             "WHERE e.tenantId = :tenantId " +
             "AND e.type = :type " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<EntityViewInfoEntity> findEntityViewInfosByTenantIdAndType(@Param("tenantId") String tenantId,
+    Page<EntityViewInfoEntity> findEntityViewInfosByTenantIdAndType(@Param("tenantId") UUID tenantId,
                                                                     @Param("type") String type,
                                                                     @Param("textSearch") String textSearch,
                                                                     Pageable pageable);
@@ -76,8 +76,8 @@ public interface EntityViewRepository extends PagingAndSortingRepository<EntityV
     @Query("SELECT e FROM EntityViewEntity e WHERE e.tenantId = :tenantId " +
             "AND e.customerId = :customerId " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<EntityViewEntity> findByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                       @Param("customerId") String customerId,
+    Page<EntityViewEntity> findByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                       @Param("customerId") UUID customerId,
                                                        @Param("searchText") String searchText,
                                                        Pageable pageable);
 
@@ -87,8 +87,8 @@ public interface EntityViewRepository extends PagingAndSortingRepository<EntityV
             "WHERE e.tenantId = :tenantId " +
             "AND e.customerId = :customerId " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<EntityViewInfoEntity> findEntityViewInfosByTenantIdAndCustomerId(@Param("tenantId") String tenantId,
-                                                                          @Param("customerId") String customerId,
+    Page<EntityViewInfoEntity> findEntityViewInfosByTenantIdAndCustomerId(@Param("tenantId") UUID tenantId,
+                                                                          @Param("customerId") UUID customerId,
                                                                           @Param("searchText") String searchText,
                                                                           Pageable pageable);
 
@@ -96,8 +96,8 @@ public interface EntityViewRepository extends PagingAndSortingRepository<EntityV
             "AND e.customerId = :customerId " +
             "AND e.type = :type " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<EntityViewEntity> findByTenantIdAndCustomerIdAndType(@Param("tenantId") String tenantId,
-                                                              @Param("customerId") String customerId,
+    Page<EntityViewEntity> findByTenantIdAndCustomerIdAndType(@Param("tenantId") UUID tenantId,
+                                                              @Param("customerId") UUID customerId,
                                                               @Param("type") String type,
                                                               @Param("searchText") String searchText,
                                                               Pageable pageable);
@@ -109,16 +109,16 @@ public interface EntityViewRepository extends PagingAndSortingRepository<EntityV
             "AND e.customerId = :customerId " +
             "AND e.type = :type " +
             "AND LOWER(e.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<EntityViewInfoEntity> findEntityViewInfosByTenantIdAndCustomerIdAndType(@Param("tenantId") String tenantId,
-                                                                                 @Param("customerId") String customerId,
+    Page<EntityViewInfoEntity> findEntityViewInfosByTenantIdAndCustomerIdAndType(@Param("tenantId") UUID tenantId,
+                                                                                 @Param("customerId") UUID customerId,
                                                                                  @Param("type") String type,
                                                                                  @Param("textSearch") String textSearch,
                                                                                  Pageable pageable);
 
-    EntityViewEntity findByTenantIdAndName(String tenantId, String name);
+    EntityViewEntity findByTenantIdAndName(UUID tenantId, String name);
 
-    List<EntityViewEntity> findAllByTenantIdAndEntityId(String tenantId, String entityId);
+    List<EntityViewEntity> findAllByTenantIdAndEntityId(UUID tenantId, UUID entityId);
 
     @Query("SELECT DISTINCT ev.type FROM EntityViewEntity ev WHERE ev.tenantId = :tenantId")
-    List<String> findTenantEntityViewTypes(@Param("tenantId") String tenantId);
+    List<String> findTenantEntityViewTypes(@Param("tenantId") UUID tenantId);
 }

@@ -19,7 +19,10 @@ import com.google.common.util.concurrent.ListenableFuture;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.*;
+import org.thingsboard.server.common.data.EntitySubtype;
+import org.thingsboard.server.common.data.EntityType;
+import org.thingsboard.server.common.data.EntityView;
+import org.thingsboard.server.common.data.EntityViewInfo;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
@@ -37,8 +40,6 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-
 /**
  * Created by Victor Basanets on 8/31/2017.
  */
@@ -56,20 +57,20 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     }
 
     @Override
-    protected CrudRepository<EntityViewEntity, String> getCrudRepository() {
+    protected CrudRepository<EntityViewEntity, UUID> getCrudRepository() {
         return entityViewRepository;
     }
 
     @Override
     public EntityViewInfo findEntityViewInfoById(TenantId tenantId, UUID entityViewId) {
-        return DaoUtil.getData(entityViewRepository.findEntityViewInfoById(fromTimeUUID(entityViewId)));
+        return DaoUtil.getData(entityViewRepository.findEntityViewInfoById(entityViewId));
     }
 
     @Override
     public PageData<EntityView> findEntityViewsByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findByTenantId(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }
@@ -78,7 +79,7 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     public PageData<EntityViewInfo> findEntityViewInfosByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findEntityViewInfosByTenantId(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, EntityViewInfoEntity.entityViewInfoColumnMap)));
     }
@@ -87,7 +88,7 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     public PageData<EntityView> findEntityViewsByTenantIdAndType(UUID tenantId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findByTenantIdAndType(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
@@ -97,7 +98,7 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     public PageData<EntityViewInfo> findEntityViewInfosByTenantIdAndType(UUID tenantId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findEntityViewInfosByTenantIdAndType(
-                        fromTimeUUID(tenantId),
+                        tenantId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, EntityViewInfoEntity.entityViewInfoColumnMap)));
@@ -106,7 +107,7 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     @Override
     public Optional<EntityView> findEntityViewByTenantIdAndName(UUID tenantId, String name) {
         return Optional.ofNullable(
-                DaoUtil.getData(entityViewRepository.findByTenantIdAndName(fromTimeUUID(tenantId), name)));
+                DaoUtil.getData(entityViewRepository.findByTenantIdAndName(tenantId, name)));
     }
 
     @Override
@@ -115,8 +116,8 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
                                                                        PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findByTenantIdAndCustomerId(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)
                 ));
@@ -126,8 +127,8 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     public PageData<EntityViewInfo> findEntityViewInfosByTenantIdAndCustomerId(UUID tenantId, UUID customerId, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findEntityViewInfosByTenantIdAndCustomerId(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, EntityViewInfoEntity.entityViewInfoColumnMap)));
     }
@@ -136,8 +137,8 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     public PageData<EntityView> findEntityViewsByTenantIdAndCustomerIdAndType(UUID tenantId, UUID customerId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findByTenantIdAndCustomerIdAndType(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)
@@ -148,8 +149,8 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     public PageData<EntityViewInfo> findEntityViewInfosByTenantIdAndCustomerIdAndType(UUID tenantId, UUID customerId, String type, PageLink pageLink) {
         return DaoUtil.toPageData(
                 entityViewRepository.findEntityViewInfosByTenantIdAndCustomerIdAndType(
-                        fromTimeUUID(tenantId),
-                        fromTimeUUID(customerId),
+                        tenantId,
+                        customerId,
                         type,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink, EntityViewInfoEntity.entityViewInfoColumnMap)));
@@ -158,12 +159,12 @@ public class JpaEntityViewDao extends JpaAbstractSearchTextDao<EntityViewEntity,
     @Override
     public ListenableFuture<List<EntityView>> findEntityViewsByTenantIdAndEntityIdAsync(UUID tenantId, UUID entityId) {
         return service.submit(() -> DaoUtil.convertDataList(
-                entityViewRepository.findAllByTenantIdAndEntityId(UUIDConverter.fromTimeUUID(tenantId), UUIDConverter.fromTimeUUID(entityId))));
+                entityViewRepository.findAllByTenantIdAndEntityId(tenantId, entityId)));
     }
 
     @Override
     public ListenableFuture<List<EntitySubtype>> findTenantEntityViewTypesAsync(UUID tenantId) {
-        return service.submit(() -> convertTenantEntityViewTypesToDto(tenantId, entityViewRepository.findTenantEntityViewTypes(fromTimeUUID(tenantId))));
+        return service.submit(() -> convertTenantEntityViewTypesToDto(tenantId, entityViewRepository.findTenantEntityViewTypes(tenantId)));
     }
 
     private List<EntitySubtype> convertTenantEntityViewTypesToDto(UUID tenantId, List<String> types) {

@@ -23,7 +23,6 @@ import org.springframework.transaction.PlatformTransactionManager;
 import org.springframework.transaction.TransactionDefinition;
 import org.springframework.transaction.TransactionStatus;
 import org.springframework.transaction.support.DefaultTransactionDefinition;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.dao.model.sql.EventEntity;
 
 import javax.persistence.EntityManager;
@@ -69,7 +68,8 @@ public abstract class AbstractEventInsertRepository implements EventInsertReposi
 
     protected Query getQuery(EventEntity entity, String query) {
         return entityManager.createNativeQuery(query, EventEntity.class)
-                .setParameter("id", UUIDConverter.fromTimeUUID(entity.getUuid()))
+                .setParameter("id", entity.getUuid())
+                .setParameter("created_time", entity.getCreatedTime())
                 .setParameter("body", entity.getBody().toString())
                 .setParameter("entity_id", entity.getEntityId())
                 .setParameter("entity_type", entity.getEntityType().name())

@@ -25,60 +25,61 @@ import org.thingsboard.server.dao.model.sql.EventEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 5/3/2017.
  */
 @SqlDao
-public interface EventRepository extends PagingAndSortingRepository<EventEntity, String> {
+public interface EventRepository extends PagingAndSortingRepository<EventEntity, UUID> {
 
-    EventEntity findByTenantIdAndEntityTypeAndEntityIdAndEventTypeAndEventUid(String tenantId,
+    EventEntity findByTenantIdAndEntityTypeAndEntityIdAndEventTypeAndEventUid(UUID tenantId,
                                                                               EntityType entityType,
-                                                                              String entityId,
+                                                                              UUID entityId,
                                                                               String eventType,
                                                                               String eventUid);
 
-    EventEntity findByTenantIdAndEntityTypeAndEntityId(String tenantId,
+    EventEntity findByTenantIdAndEntityTypeAndEntityId(UUID tenantId,
                                                        EntityType entityType,
-                                                       String entityId);
+                                                       UUID entityId);
 
     @Query("SELECT e FROM EventEntity e WHERE e.tenantId = :tenantId AND e.entityType = :entityType " +
             "AND e.entityId = :entityId AND e.eventType = :eventType ORDER BY e.eventType DESC, e.id DESC")
     List<EventEntity> findLatestByTenantIdAndEntityTypeAndEntityIdAndEventType(
-                                                    @Param("tenantId") String tenantId,
+                                                    @Param("tenantId") UUID tenantId,
                                                     @Param("entityType") EntityType entityType,
-                                                    @Param("entityId") String entityId,
+                                                    @Param("entityId") UUID entityId,
                                                     @Param("eventType") String eventType,
                                                     Pageable pageable);
 
     @Query("SELECT e FROM EventEntity e WHERE " +
             "e.tenantId = :tenantId " +
             "AND e.entityType = :entityType AND e.entityId = :entityId " +
-            "AND (:startId IS NULL OR e.id >= :startId) " +
-            "AND (:endId IS NULL OR e.id <= :endId) " +
+            "AND (:startTime IS NULL OR e.createdTime >= :startTime) " +
+            "AND (:endTime IS NULL OR e.createdTime <= :endTime) " +
             "AND LOWER(e.eventType) LIKE LOWER(CONCAT(:textSearch, '%'))"
     )
-    Page<EventEntity> findEventsByTenantIdAndEntityId(@Param("tenantId") String tenantId,
+    Page<EventEntity> findEventsByTenantIdAndEntityId(@Param("tenantId") UUID tenantId,
                                                       @Param("entityType") EntityType entityType,
-                                                      @Param("entityId") String entityId,
+                                                      @Param("entityId") UUID entityId,
                                                       @Param("textSearch") String textSearch,
-                                                      @Param("startId") String startId,
-                                                      @Param("endId") String endId,
+                                                      @Param("startTime") Long startTime,
+                                                      @Param("endTime") Long endTime,
                                                       Pageable pageable);
 
     @Query("SELECT e FROM EventEntity e WHERE " +
             "e.tenantId = :tenantId " +
             "AND e.entityType = :entityType AND e.entityId = :entityId " +
             "AND e.eventType = :eventType " +
-            "AND (:startId IS NULL OR e.id >= :startId) " +
-            "AND (:endId IS NULL OR e.id <= :endId)"
+            "AND (:startTime IS NULL OR e.createdTime >= :startTime) " +
+            "AND (:endTime IS NULL OR e.createdTime <= :endTime)"
     )
-    Page<EventEntity> findEventsByTenantIdAndEntityIdAndEventType(@Param("tenantId") String tenantId,
+    Page<EventEntity> findEventsByTenantIdAndEntityIdAndEventType(@Param("tenantId") UUID tenantId,
                                                                   @Param("entityType") EntityType entityType,
-                                                                  @Param("entityId") String entityId,
+                                                                  @Param("entityId") UUID entityId,
                                                                   @Param("eventType") String eventType,
-                                                                  @Param("startId") String startId,
-                                                                  @Param("endId") String endId,
+                                                                  @Param("startTime") Long startTime,
+                                                                  @Param("endTime") Long endTime,
                                                                   Pageable pageable);
 
 }

@@ -16,11 +16,12 @@
 package org.thingsboard.server.dao.sql.event;
 
 import org.springframework.stereotype.Repository;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.dao.model.sql.EventEntity;
 import org.thingsboard.server.dao.util.HsqlDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import javax.persistence.Query;
+
 @SqlDao
 @HsqlDao
 @Repository
@@ -40,11 +41,25 @@ public class HsqlEventInsertRepository extends AbstractEventInsertRepository {
     @Override
     protected EventEntity doProcessSaveOrUpdate(EventEntity entity, String query) {
         getQuery(entity, query).executeUpdate();
-        return entityManager.find(EventEntity.class, UUIDConverter.fromTimeUUID(entity.getUuid()));
+        return entityManager.find(EventEntity.class, entity.getUuid());
+    }
+
+    protected Query getQuery(EventEntity entity, String query) {
+        return entityManager.createNativeQuery(query, EventEntity.class)
+                .setParameter("id", entity.getUuid().toString())
+                .setParameter("created_time", entity.getCreatedTime())
+                .setParameter("body", entity.getBody().toString())
+                .setParameter("entity_id", entity.getEntityId().toString())
+                .setParameter("entity_type", entity.getEntityType().name())
+                .setParameter("event_type", entity.getEventType())
+                .setParameter("event_uid", entity.getEventUid())
+                .setParameter("tenant_id", entity.getTenantId().toString())
+                .setParameter("ts", entity.getTs());
     }
 
     private static String getInsertString(String conflictStatement) {
-        return "MERGE INTO event USING (VALUES :id, :body, :entity_id, :entity_type, :event_type, :event_uid, :tenant_id, :ts) I (id, body, entity_id, entity_type, event_type, event_uid, tenant_id, ts) ON " + conflictStatement + " WHEN MATCHED THEN UPDATE SET event.id = I.id, event.body = I.body, event.entity_id = I.entity_id, event.entity_type = I.entity_type, event.event_type = I.event_type, event.event_uid = I.event_uid, event.tenant_id = I.tenant_id, event.ts = I.ts" +
-                " WHEN NOT MATCHED THEN INSERT (id, body, entity_id, entity_type, event_type, event_uid, tenant_id, ts) VALUES (I.id, I.body, I.entity_id, I.entity_type, I.event_type, I.event_uid, I.tenant_id, I.ts)";
+        return "MERGE INTO event USING (VALUES UUID(:id), :created_time, :body, UUID(:entity_id), :entity_type, :event_type, :event_uid, UUID(:tenant_id), :ts) I (id, created_time, body, entity_id, entity_type, event_type, event_uid, tenant_id, ts) ON " + conflictStatement
+                + " WHEN MATCHED THEN UPDATE SET event.id = I.id, event.created_time = I.created_time, event.body = I.body, event.entity_id = I.entity_id, event.entity_type = I.entity_type, event.event_type = I.event_type, event.event_uid = I.event_uid, event.tenant_id = I.tenant_id, event.ts = I.ts" +
+                " WHEN NOT MATCHED THEN INSERT (id, created_time, body, entity_id, entity_type, event_type, event_uid, tenant_id, ts) VALUES (I.id, I.created_time, I.body, I.entity_id, I.entity_type, I.event_type, I.event_uid, I.tenant_id, I.ts)";
     }
 }
\ No newline at end of file

@@ -38,9 +38,12 @@ import org.thingsboard.server.dao.sql.JpaAbstractSearchTimeDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import javax.persistence.criteria.Predicate;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
 import static org.thingsboard.server.dao.DaoUtil.endTimeToId;
 import static org.thingsboard.server.dao.DaoUtil.startTimeToId;
 import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID;
@@ -67,7 +70,7 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
     }
 
     @Override
-    protected CrudRepository<EventEntity, String> getCrudRepository() {
+    protected CrudRepository<EventEntity, UUID> getCrudRepository() {
         return eventRepository;
     }
 
@@ -75,7 +78,16 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
     public Event save(TenantId tenantId, Event event) {
         log.debug("Save event [{}] ", event);
         if (event.getId() == null) {
-            event.setId(new EventId(Uuids.timeBased()));
+            UUID timeBased = Uuids.timeBased();
+            event.setId(new EventId(timeBased));
+            event.setCreatedTime(Uuids.unixTimestamp(timeBased));
+        } else if (event.getCreatedTime() == 0L) {
+            UUID eventId = event.getId().getId();
+            if (eventId.version() == 1) {
+                event.setCreatedTime(Uuids.unixTimestamp(eventId));
+            } else {
+                event.setCreatedTime(System.currentTimeMillis());
+            }
         }
         if (StringUtils.isEmpty(event.getUid())) {
             event.setUid(event.getId().toString());
@@ -87,7 +99,16 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
     public ListenableFuture<Event> saveAsync(Event event) {
         log.debug("Save event [{}] ", event);
         if (event.getId() == null) {
-            event.setId(new EventId(Uuids.timeBased()));
+            UUID timeBased = Uuids.timeBased();
+            event.setId(new EventId(timeBased));
+            event.setCreatedTime(Uuids.unixTimestamp(timeBased));
+        } else if (event.getCreatedTime() == 0L) {
+            UUID eventId = event.getId().getId();
+            if (eventId.version() == 1) {
+                event.setCreatedTime(Uuids.unixTimestamp(eventId));
+            } else {
+                event.setCreatedTime(System.currentTimeMillis());
+            }
         }
         if (StringUtils.isEmpty(event.getUid())) {
             event.setUid(event.getId().toString());
@@ -103,7 +124,7 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
     @Override
     public Event findEvent(UUID tenantId, EntityId entityId, String eventType, String eventUid) {
         return DaoUtil.getData(eventRepository.findByTenantIdAndEntityTypeAndEntityIdAndEventTypeAndEventUid(
-                UUIDConverter.fromTimeUUID(tenantId), entityId.getEntityType(), UUIDConverter.fromTimeUUID(entityId.getId()), eventType, eventUid));
+                tenantId, entityId.getEntityType(), entityId.getId(), eventType, eventUid));
     }
 
     @Override
@@ -111,12 +132,12 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
         return DaoUtil.toPageData(
                 eventRepository
                         .findEventsByTenantIdAndEntityId(
-                                fromTimeUUID(tenantId),
+                                tenantId,
                                 entityId.getEntityType(),
-                                fromTimeUUID(entityId.getId()),
+                                entityId.getId(),
                                 Objects.toString(pageLink.getTextSearch(), ""),
-                                startTimeToId(pageLink.getStartTime()),
-                                endTimeToId(pageLink.getEndTime()),
+                                pageLink.getStartTime(),
+                                pageLink.getEndTime(),
                                 DaoUtil.toPageable(pageLink)));
     }
 
@@ -125,21 +146,21 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
         return DaoUtil.toPageData(
                 eventRepository
                         .findEventsByTenantIdAndEntityIdAndEventType(
-                                fromTimeUUID(tenantId),
+                                tenantId,
                                 entityId.getEntityType(),
-                                fromTimeUUID(entityId.getId()),
+                                entityId.getId(),
                                 eventType,
-                                startTimeToId(pageLink.getStartTime()),
-                                endTimeToId(pageLink.getEndTime()),
+                                pageLink.getStartTime(),
+                                pageLink.getEndTime(),
                                 DaoUtil.toPageable(pageLink)));
     }
 
     @Override
     public List<Event> findLatestEvents(UUID tenantId, EntityId entityId, String eventType, int limit) {
         List<EventEntity> latest = eventRepository.findLatestByTenantIdAndEntityTypeAndEntityIdAndEventType(
-                UUIDConverter.fromTimeUUID(tenantId),
+                tenantId,
                 entityId.getEntityType(),
-                UUIDConverter.fromTimeUUID(entityId.getId()),
+                entityId.getId(),
                 eventType,
                 PageRequest.of(0, limit));
         return DaoUtil.convertDataList(latest);
@@ -149,7 +170,7 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
         log.debug("Save event [{}] ", entity);
         if (entity.getTenantId() == null) {
             log.trace("Save system event with predefined id {}", systemTenantId);
-            entity.setTenantId(UUIDConverter.fromTimeUUID(systemTenantId));
+            entity.setTenantId(systemTenantId);
         }
         if (entity.getUuid() == null) {
             entity.setUuid(Uuids.timeBased());
@@ -168,13 +189,13 @@ public class JpaBaseEventDao extends JpaAbstractSearchTimeDao<EventEntity, Event
         return (root, criteriaQuery, criteriaBuilder) -> {
             List<Predicate> predicates = new ArrayList<>();
             if (tenantId != null) {
-                Predicate tenantIdPredicate = criteriaBuilder.equal(root.get("tenantId"), UUIDConverter.fromTimeUUID(tenantId));
+                Predicate tenantIdPredicate = criteriaBuilder.equal(root.get("tenantId"), tenantId);
                 predicates.add(tenantIdPredicate);
             }
             if (entityId != null) {
                 Predicate entityTypePredicate = criteriaBuilder.equal(root.get("entityType"), entityId.getEntityType());
                 predicates.add(entityTypePredicate);
-                Predicate entityIdPredicate = criteriaBuilder.equal(root.get("entityId"), UUIDConverter.fromTimeUUID(entityId.getId()));
+                Predicate entityIdPredicate = criteriaBuilder.equal(root.get("entityId"), entityId.getId());
                 predicates.add(entityIdPredicate);
             }
             if (eventType != null) {

@@ -28,10 +28,10 @@ import org.thingsboard.server.dao.util.SqlDao;
 public class PsqlEventInsertRepository extends AbstractEventInsertRepository {
 
     private static final String P_KEY_CONFLICT_STATEMENT = "(id)";
-    private static final String UNQ_KEY_CONFLICT_STATEMENT = "(tenant_id, entity_type, entity_id, event_type, event_uid)";
+    private static final String UNQ_KEY_CONFLICT_STATEMENT = "(tenant_id, created_time, entity_type, entity_id, event_type, event_uid)";
 
     private static final String UPDATE_P_KEY_STATEMENT = "id = :id";
-    private static final String UPDATE_UNQ_KEY_STATEMENT = "tenant_id = :tenant_id, entity_type = :entity_type, entity_id = :entity_id, event_type = :event_type, event_uid = :event_uid";
+    private static final String UPDATE_UNQ_KEY_STATEMENT = "created_time = :created_time, tenant_id = :tenant_id, entity_type = :entity_type, entity_id = :entity_id, event_type = :event_type, event_uid = :event_uid";
 
     private static final String INSERT_OR_UPDATE_ON_P_KEY_CONFLICT = getInsertOrUpdateString(P_KEY_CONFLICT_STATEMENT, UPDATE_UNQ_KEY_STATEMENT);
     private static final String INSERT_OR_UPDATE_ON_UNQ_KEY_CONFLICT = getInsertOrUpdateString(UNQ_KEY_CONFLICT_STATEMENT, UPDATE_P_KEY_STATEMENT);
@@ -48,6 +48,8 @@ public class PsqlEventInsertRepository extends AbstractEventInsertRepository {
     }
 
     private static String getInsertOrUpdateString(String eventKeyStatement, String updateKeyStatement) {
-        return "INSERT INTO event (id, body, entity_id, entity_type, event_type, event_uid, tenant_id, ts) VALUES (:id, :body, :entity_id, :entity_type, :event_type, :event_uid, :tenant_id, :ts) ON CONFLICT " + eventKeyStatement + " DO UPDATE SET body = :body, ts = :ts," + updateKeyStatement + " returning *";
+        return "INSERT INTO event (id, created_time, body, entity_id, entity_type, event_type, event_uid, tenant_id, ts) " +
+                "VALUES (:id, :created_time, :body, :entity_id, :entity_type, :event_type, :event_uid, :tenant_id, :ts) " +
+                "ON CONFLICT " + eventKeyStatement + " DO UPDATE SET body = :body, ts = :ts," + updateKeyStatement + " returning *";
     }
 }
\ No newline at end of file

@@ -17,10 +17,10 @@ package org.thingsboard.server.dao.sql.query;
 
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
 import org.springframework.stereotype.Repository;
 import org.thingsboard.server.common.data.EntityType;
-import org.thingsboard.server.common.data.UUIDConverter;
-import org.thingsboard.server.common.data.asset.Asset;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
@@ -46,8 +46,6 @@ import org.thingsboard.server.common.data.relation.EntitySearchDirection;
 import org.thingsboard.server.common.data.relation.EntityTypeFilter;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import javax.persistence.EntityManager;
-import javax.persistence.PersistenceContext;
 import java.math.BigInteger;
 import java.util.Collections;
 import java.util.HashMap;
@@ -77,7 +75,7 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
     public static final String HIERARCHICAL_QUERY_TEMPLATE = " FROM (WITH RECURSIVE related_entities(from_id, from_type, to_id, to_type, relation_type, lvl) AS (" +
             " SELECT from_id, from_type, to_id, to_type, relation_type, 1 as lvl" +
             " FROM relation" +
-            " WHERE $in_id = '%s' and $in_type = '%s' and relation_type_group = 'COMMON'" +
+            " WHERE $in_id = :relation_root_id and $in_type = :relation_root_type and relation_type_group = 'COMMON'" +
             " UNION ALL" +
             " SELECT r.from_id, r.from_type, r.to_id, r.to_type, r.relation_type, lvl + 1" +
             " FROM relation r" +
@@ -90,21 +88,23 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
     public static final String HIERARCHICAL_TO_QUERY_TEMPLATE = HIERARCHICAL_QUERY_TEMPLATE.replace("$in", "to").replace("$out", "from");
     public static final String HIERARCHICAL_FROM_QUERY_TEMPLATE = HIERARCHICAL_QUERY_TEMPLATE.replace("$in", "from").replace("$out", "to");
 
-    @PersistenceContext
-    private EntityManager entityManager;
+    @Autowired
+    protected NamedParameterJdbcTemplate jdbcTemplate;
 
     @Override
     public long countEntitiesByQuery(TenantId tenantId, CustomerId customerId, EntityCountQuery query) {
         EntityType entityType = resolveEntityType(query.getEntityFilter());
-        String countQuery = String.format("select count(e.id) from %s e where %s",
-                getEntityTableQuery(query.getEntityFilter(), entityType), this.buildEntityWhere(tenantId, customerId, query.getEntityFilter(),
-                        Collections.emptyList(), entityType));
-        return ((BigInteger) entityManager.createNativeQuery(countQuery)
-                .getSingleResult()).longValue();
+        EntityQueryContext ctx = new EntityQueryContext();
+        ctx.append("select count(e.id) from ");
+        ctx.append(addEntityTableQuery(ctx, query.getEntityFilter(), entityType));
+        ctx.append(" e where ");
+        ctx.append(buildEntityWhere(ctx, tenantId, customerId, query.getEntityFilter(), Collections.emptyList(), entityType));
+        return jdbcTemplate.queryForObject(ctx.getQuery(), ctx, Long.class);
     }
 
     @Override
     public PageData<EntityData> findEntityDataByQuery(TenantId tenantId, CustomerId customerId, EntityDataQuery query) {
+        EntityQueryContext ctx = new EntityQueryContext();
         EntityType entityType = resolveEntityType(query.getEntityFilter());
         EntityDataPageLink pageLink = query.getPageLink();
 
@@ -128,9 +128,9 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
                 .collect(Collectors.toList());
 
 
-        String entityWhereClause = this.buildEntityWhere(tenantId, customerId, query.getEntityFilter(), entityFieldsFiltersMapping, entityType);
-        String latestJoins = EntityKeyMapping.buildLatestJoins(query.getEntityFilter(), entityType, allLatestMappings);
-        String whereClause = this.buildWhere(selectionMapping, latestFiltersMapping, pageLink.getTextSearch());
+        String entityWhereClause = this.buildEntityWhere(ctx, tenantId, customerId, query.getEntityFilter(), entityFieldsFiltersMapping, entityType);
+        String latestJoins = EntityKeyMapping.buildLatestJoins(ctx, query.getEntityFilter(), entityType, allLatestMappings);
+        String whereClause = this.buildWhere(ctx, selectionMapping, latestFiltersMapping, pageLink.getTextSearch());
         String entityFieldsSelection = EntityKeyMapping.buildSelections(entityFieldsSelectionMapping);
         String entityTypeStr;
         if (query.getEntityFilter().getType().equals(EntityFilterType.RELATIONS_QUERY)) {
@@ -139,9 +139,9 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
             entityTypeStr = "'" + entityType.name() + "'";
         }
         if (!StringUtils.isEmpty(entityFieldsSelection)) {
-            entityFieldsSelection = String.format("e.id, %s, %s", entityTypeStr, entityFieldsSelection);
+            entityFieldsSelection = String.format("e.id id, %s entity_type, %s", entityTypeStr, entityFieldsSelection);
         } else {
-            entityFieldsSelection = String.format("e.id, %s", entityTypeStr);
+            entityFieldsSelection = String.format("e.id id, %s entity_type", entityTypeStr);
         }
         String latestSelection = EntityKeyMapping.buildSelections(latestSelectionMapping);
         String topSelection = "entities.*";
@@ -152,13 +152,13 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
         String fromClause = String.format("from (select %s from (select %s from %s e where %s) entities %s %s) result",
                 topSelection,
                 entityFieldsSelection,
-                getEntityTableQuery(query.getEntityFilter(), entityType),
+                addEntityTableQuery(ctx, query.getEntityFilter(), entityType),
                 entityWhereClause,
                 latestJoins,
                 whereClause);
 
-        int totalElements = ((BigInteger) entityManager.createNativeQuery(String.format("select count(*) %s", fromClause))
-                .getSingleResult()).intValue();
+
+        int totalElements = jdbcTemplate.queryForObject(String.format("select count(*) %s", fromClause), ctx, Integer.class);
 
         String dataQuery = String.format("select * %s", fromClause);
 
@@ -179,17 +179,18 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
         if (pageLink.getPageSize() > 0) {
             dataQuery = String.format("%s limit %s offset %s", dataQuery, pageLink.getPageSize(), startIndex);
         }
-        List rows = entityManager.createNativeQuery(dataQuery).getResultList();
+        List<Map<String, Object>> rows = jdbcTemplate.queryForList(dataQuery, ctx);
         return EntityDataAdapter.createEntityData(pageLink, selectionMapping, rows, totalElements);
     }
 
-    private String buildEntityWhere(TenantId tenantId,
+    private String buildEntityWhere(EntityQueryContext ctx,
+                                    TenantId tenantId,
                                     CustomerId customerId,
                                     EntityFilter entityFilter,
                                     List<EntityKeyMapping> entityFieldsFilters,
                                     EntityType entityType) {
-        String permissionQuery = this.buildPermissionQuery(entityFilter, tenantId, customerId, entityType);
-        String entityFilterQuery = this.buildEntityFilterQuery(entityFilter);
+        String permissionQuery = this.buildPermissionQuery(ctx, entityFilter, tenantId, customerId, entityType);
+        String entityFilterQuery = this.buildEntityFilterQuery(ctx, entityFilter);
         String result = permissionQuery;
         if (!entityFilterQuery.isEmpty()) {
             result += " and " + entityFilterQuery;
@@ -200,35 +201,42 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
         return result;
     }
 
-    private String buildPermissionQuery(EntityFilter entityFilter, TenantId tenantId, CustomerId customerId, EntityType entityType) {
+    private String buildPermissionQuery(EntityQueryContext ctx, EntityFilter entityFilter, TenantId tenantId, CustomerId customerId, EntityType entityType) {
         switch (entityFilter.getType()) {
             case RELATIONS_QUERY:
             case DEVICE_SEARCH_QUERY:
             case ASSET_SEARCH_QUERY:
-                return String.format("e.tenant_id='%s' and e.customer_id='%s'", UUIDConverter.fromTimeUUID(tenantId.getId()), UUIDConverter.fromTimeUUID(customerId.getId()));
+                ctx.addUuidParameter("permissions_tenant_id", tenantId.getId());
+                ctx.addUuidParameter("permissions_customer_id", customerId.getId());
+                return "e.tenant_id=:permissions_tenant_id and e.customer_id=:permissions_customer_id";
             default:
                 if (entityType == EntityType.TENANT) {
-                    return String.format("e.id='%s'", UUIDConverter.fromTimeUUID(tenantId.getId()));
+                    ctx.addUuidParameter("permissions_tenant_id", tenantId.getId());
+                    return "e.id=:permissions_tenant_id";
                 } else if (entityType == EntityType.CUSTOMER) {
-                    return String.format("e.tenant_id='%s' and e.id='%s'", UUIDConverter.fromTimeUUID(tenantId.getId()), UUIDConverter.fromTimeUUID(customerId.getId()));
+                    ctx.addUuidParameter("permissions_tenant_id", tenantId.getId());
+                    ctx.addUuidParameter("permissions_customer_id", customerId.getId());
+                    return "e.tenant_id=:permissions_tenant_id and e.id=:permissions_customer_id";
                 } else {
-                    return String.format("e.tenant_id='%s' and e.customer_id='%s'", UUIDConverter.fromTimeUUID(tenantId.getId()), UUIDConverter.fromTimeUUID(customerId.getId()));
+                    ctx.addUuidParameter("permissions_tenant_id", tenantId.getId());
+                    ctx.addUuidParameter("permissions_customer_id", customerId.getId());
+                    return "e.tenant_id=:permissions_tenant_id and e.customer_id=:permissions_customer_id";
                 }
         }
     }
 
-    private String buildEntityFilterQuery(EntityFilter entityFilter) {
+    private String buildEntityFilterQuery(EntityQueryContext ctx, EntityFilter entityFilter) {
         switch (entityFilter.getType()) {
             case SINGLE_ENTITY:
-                return this.singleEntityQuery((SingleEntityFilter) entityFilter);
+                return this.singleEntityQuery(ctx, (SingleEntityFilter) entityFilter);
             case ENTITY_LIST:
-                return this.entityListQuery((EntityListFilter) entityFilter);
+                return this.entityListQuery(ctx, (EntityListFilter) entityFilter);
             case ENTITY_NAME:
-                return this.entityNameQuery((EntityNameFilter) entityFilter);
+                return this.entityNameQuery(ctx, (EntityNameFilter) entityFilter);
             case ASSET_TYPE:
             case DEVICE_TYPE:
             case ENTITY_VIEW_TYPE:
-                return this.typeQuery(entityFilter);
+                return this.typeQuery(ctx, entityFilter);
             case RELATIONS_QUERY:
             case DEVICE_SEARCH_QUERY:
             case ASSET_SEARCH_QUERY:
@@ -238,52 +246,60 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
         }
     }
 
-    private String getEntityTableQuery(EntityFilter entityFilter, EntityType entityType) {
+    private String addEntityTableQuery(EntityQueryContext ctx, EntityFilter entityFilter, EntityType entityType) {
         switch (entityFilter.getType()) {
             case RELATIONS_QUERY:
-                return relationQuery((RelationsQueryFilter) entityFilter);
+                return relationQuery(ctx, (RelationsQueryFilter) entityFilter);
             case DEVICE_SEARCH_QUERY:
                 DeviceSearchQueryFilter deviceQuery = (DeviceSearchQueryFilter) entityFilter;
-                return entitySearchQuery(deviceQuery, EntityType.DEVICE, deviceQuery.getDeviceTypes());
+                return entitySearchQuery(ctx, deviceQuery, EntityType.DEVICE, deviceQuery.getDeviceTypes());
             case ASSET_SEARCH_QUERY:
                 AssetSearchQueryFilter assetQuery = (AssetSearchQueryFilter) entityFilter;
-                return entitySearchQuery(assetQuery, EntityType.ASSET, assetQuery.getAssetTypes());
+                return entitySearchQuery(ctx, assetQuery, EntityType.ASSET, assetQuery.getAssetTypes());
             default:
                 return entityTableMap.get(entityType);
         }
     }
 
-    private String entitySearchQuery(EntitySearchQueryFilter entityFilter, EntityType entityType, List<String> types) {
+    private String entitySearchQuery(EntityQueryContext ctx, EntitySearchQueryFilter entityFilter, EntityType entityType, List<String> types) {
         EntityId rootId = entityFilter.getRootEntity();
         //TODO: fetch last level only.
+        //TODO: fetch distinct records.
         String lvlFilter = getLvlFilter(entityFilter.getMaxLevel());
         String selectFields = "SELECT tenant_id, customer_id, id, type, name, label FROM " + entityType.name() + " WHERE id in ( SELECT entity_id";
         String from = getQueryTemplate(entityFilter.getDirection());
+        String whereFilter = " WHERE re.relation_type = :where_relation_type AND re.to_type = :where_entity_type";
 
-        String whereFilter = " WHERE " + " re.relation_type = '" + entityFilter.getRelationType() + "'" +
-                " AND re.to_type = '" + entityType.name() + "'";
-        from = String.format(from, UUIDConverter.fromTimeUUID(rootId.getId()), rootId.getEntityType().name(), lvlFilter, whereFilter);
+        from = String.format(from, lvlFilter, whereFilter);
         String query = "( " + selectFields + from + ")";
         if (types != null && !types.isEmpty()) {
-            query += " and type in (" + types.stream().map(type -> "'" + type + "'").collect(Collectors.joining(", ")) + ")";
+            query += " and type in (:relation_sub_types)";
+            ctx.addStringListParameter("relation_sub_types", types);
         }
         query += " )";
+        ctx.addUuidParameter("relation_root_id", rootId.getId());
+        ctx.addStringParameter("relation_root_type", rootId.getEntityType().name());
+        ctx.addStringParameter("where_relation_type", entityFilter.getRelationType());
+        ctx.addStringParameter("where_entity_type", entityType.name());
         return query;
     }
 
-    private String relationQuery(RelationsQueryFilter entityFilter) {
+    private String relationQuery(EntityQueryContext ctx, RelationsQueryFilter entityFilter) {
         EntityId rootId = entityFilter.getRootEntity();
         String lvlFilter = getLvlFilter(entityFilter.getMaxLevel());
         String selectFields = getSelectTenantId() + ", " + getSelectCustomerId() + ", " +
                 " entity.entity_id as id," + getSelectType() + ", " + getSelectName() + ", " +
                 getSelectLabel() + ", entity.entity_type as entity_type";
         String from = getQueryTemplate(entityFilter.getDirection());
+        ctx.addUuidParameter("relation_root_id", rootId.getId());
+        ctx.addStringParameter("relation_root_type", rootId.getEntityType().name());
 
         StringBuilder whereFilter;
         if (entityFilter.getFilters() != null && !entityFilter.getFilters().isEmpty()) {
             whereFilter = new StringBuilder(" WHERE ");
             boolean first = true;
             boolean single = entityFilter.getFilters().size() == 1;
+            int entityTypeFilterIdx = 0;
             for (EntityTypeFilter etf : entityFilter.getFilters()) {
                 if (first) {
                     first = false;
@@ -291,21 +307,23 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
                     whereFilter.append(" AND ");
                 }
                 String relationType = etf.getRelationType();
-                String entityTypes = etf.getEntityTypes().stream().map(type -> "'" + type + "'").collect(Collectors.joining(", "));
                 if (!single) {
                     whereFilter.append(" (");
                 }
-                whereFilter.append(" re.relation_type = '").append(relationType).append("' and re.")
+                whereFilter.append(" re.relation_type = :where_relation_type").append(entityTypeFilterIdx).append(" and re.")
                         .append(entityFilter.getDirection().equals(EntitySearchDirection.FROM) ? "to" : "from")
-                        .append("_type in (").append(entityTypes).append(")");
+                        .append("_type in (:where_entity_types").append(entityTypeFilterIdx).append(")");
                 if (!single) {
                     whereFilter.append(" )");
                 }
+                ctx.addStringParameter("where_relation_type" + entityTypeFilterIdx, relationType);
+                ctx.addStringListParameter("where_entity_types" + entityTypeFilterIdx, etf.getEntityTypes().stream().map(EntityType::name).collect(Collectors.toList()));
+                entityTypeFilterIdx++;
             }
         } else {
             whereFilter = new StringBuilder();
         }
-        from = String.format(from, UUIDConverter.fromTimeUUID(rootId.getId()), rootId.getEntityType().name(), lvlFilter, whereFilter);
+        from = String.format(from, lvlFilter, whereFilter);
         return "( " + selectFields + from + ")";
     }
 
@@ -344,7 +362,7 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
     private String getSelectCustomerId() {
         return "CASE" +
                 " WHEN entity.entity_type = 'TENANT'" +
-                " THEN '" + UUIDConverter.fromTimeUUID(TenantId.NULL_UUID) + "'" +
+                " THEN UUID('" + TenantId.NULL_UUID + "')" +
                 " WHEN entity.entity_type = 'CUSTOMER' THEN entity_id" +
                 " WHEN entity.entity_type = 'USER'" +
                 " THEN (select customer_id from tb_user where id = entity_id)" +
@@ -411,10 +429,9 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
                 " END as label";
     }
 
-    private String buildWhere
-            (List<EntityKeyMapping> selectionMapping, List<EntityKeyMapping> latestFiltersMapping, String searchText) {
-        String latestFilters = EntityKeyMapping.buildQuery(latestFiltersMapping);
-        String textSearchQuery = this.buildTextSearchQuery(selectionMapping, searchText);
+    private String buildWhere(EntityQueryContext ctx, List<EntityKeyMapping> selectionMapping, List<EntityKeyMapping> latestFiltersMapping, String searchText) {
+        String latestFilters = EntityKeyMapping.buildQuery(ctx, latestFiltersMapping);
+        String textSearchQuery = this.buildTextSearchQuery(ctx, selectionMapping, searchText);
         String query;
         if (!StringUtils.isEmpty(latestFilters) && !StringUtils.isEmpty(textSearchQuery)) {
             query = String.join(" AND ", latestFilters, textSearchQuery);
@@ -430,32 +447,38 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
         }
     }
 
-    private String buildTextSearchQuery(List<EntityKeyMapping> selectionMapping, String searchText) {
+    private String buildTextSearchQuery(EntityQueryContext ctx, List<EntityKeyMapping> selectionMapping, String searchText) {
         if (!StringUtils.isEmpty(searchText) && !selectionMapping.isEmpty()) {
             String lowerSearchText = searchText.toLowerCase() + "%";
-            List<String> searchPredicates = selectionMapping.stream().map(mapping -> String.format("LOWER(%s) LIKE '%s'",
-                    mapping.getValueAlias(), lowerSearchText)).collect(Collectors.toList());
+            List<String> searchPredicates = selectionMapping.stream().map(mapping -> {
+                        String paramName = mapping.getValueAlias() + "_lowerSearchText";
+                        ctx.addStringParameter(paramName, lowerSearchText);
+                        return String.format("LOWER(%s) LIKE :%s", mapping.getValueAlias(), paramName);
+                    }
+            ).collect(Collectors.toList());
             return String.format("(%s)", String.join(" or ", searchPredicates));
         } else {
             return null;
         }
+
     }
 
-    private String singleEntityQuery(SingleEntityFilter filter) {
-        return String.format("e.id='%s'", UUIDConverter.fromTimeUUID(filter.getSingleEntity().getId()));
+    private String singleEntityQuery(EntityQueryContext ctx, SingleEntityFilter filter) {
+        ctx.addUuidParameter("entity_filter_single_entity_id", filter.getSingleEntity().getId());
+        return "e.id=:entity_filter_single_entity_id";
     }
 
-    private String entityListQuery(EntityListFilter filter) {
-        return String.format("e.id in (%s)",
-                filter.getEntityList().stream().map(UUID::fromString).map(UUIDConverter::fromTimeUUID)
-                        .map(s -> String.format("'%s'", s)).collect(Collectors.joining(",")));
+    private String entityListQuery(EntityQueryContext ctx, EntityListFilter filter) {
+        ctx.addUuidListParameter("entity_filter_entity_ids", filter.getEntityList().stream().map(UUID::fromString).collect(Collectors.toList()));
+        return "e.id in (:entity_filter_entity_ids)";
     }
 
-    private String entityNameQuery(EntityNameFilter filter) {
-        return String.format("lower(e.search_text) like lower(concat('%s', '%%'))", filter.getEntityNameFilter());
+    private String entityNameQuery(EntityQueryContext ctx, EntityNameFilter filter) {
+        ctx.addStringParameter("entity_filter_name_filter", filter.getEntityNameFilter());
+        return "lower(e.search_text) like lower(concat(:entity_filter_name_filter, '%%'))";
     }
 
-    private String typeQuery(EntityFilter filter) {
+    private String typeQuery(EntityQueryContext ctx, EntityFilter filter) {
         String type;
         String name;
         switch (filter.getType()) {
@@ -474,7 +497,9 @@ public class DefaultEntityQueryRepository implements EntityQueryRepository {
             default:
                 throw new RuntimeException("Not supported!");
         }
-        return String.format("e.type = '%s' and lower(e.search_text) like lower(concat('%s', '%%'))", type, name);
+        ctx.addStringParameter("entity_filter_type_query_type", type);
+        ctx.addStringParameter("entity_filter_type_query_name", name);
+        return "e.type = :entity_filter_type_query_type and lower(e.search_text) like lower(concat(:entity_filter_type_query_name, '%%'))";
     }
 
     private EntityType resolveEntityType(EntityFilter entityFilter) {

@@ -26,39 +26,41 @@ import org.thingsboard.server.common.data.query.EntityKey;
 import org.thingsboard.server.common.data.query.EntityKeyType;
 import org.thingsboard.server.common.data.query.TsValue;
 
+import java.nio.ByteBuffer;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 import java.util.stream.Collectors;
 
 public class EntityDataAdapter {
 
     public static PageData<EntityData> createEntityData(EntityDataPageLink pageLink,
                                                         List<EntityKeyMapping> selectionMapping,
-                                                        List<Object[]> rows,
+                                                        List<Map<String, Object>> rows,
                                                         int totalElements) {
-        int totalPages = pageLink.getPageSize() > 0 ? (int)Math.ceil((float)totalElements / pageLink.getPageSize()) : 1;
+        int totalPages = pageLink.getPageSize() > 0 ? (int) Math.ceil((float) totalElements / pageLink.getPageSize()) : 1;
         int startIndex = pageLink.getPageSize() * pageLink.getPage();
         boolean hasNext = pageLink.getPageSize() > 0 && totalElements > startIndex + rows.size();
         List<EntityData> entitiesData = convertListToEntityData(rows, selectionMapping);
         return new PageData<>(entitiesData, totalPages, totalElements, hasNext);
     }
 
-    private static List<EntityData> convertListToEntityData(List<Object[]> result, List<EntityKeyMapping> selectionMapping) {
+    private static List<EntityData> convertListToEntityData(List<Map<String, Object>> result, List<EntityKeyMapping> selectionMapping) {
         return result.stream().map(row -> toEntityData(row, selectionMapping)).collect(Collectors.toList());
     }
 
-    private static EntityData toEntityData(Object[] row, List<EntityKeyMapping> selectionMapping) {
-        String id = (String)row[0];
-        EntityType entityType = EntityType.valueOf((String)row[1]);
-        EntityId entityId = EntityIdFactory.getByTypeAndUuid(entityType, UUIDConverter.fromString(id));
+    private static EntityData toEntityData(Map<String, Object> row, List<EntityKeyMapping> selectionMapping) {
+        UUID id = (UUID)row.get("id");
+        EntityType entityType = EntityType.valueOf((String) row.get("entity_type"));
+        EntityId entityId = EntityIdFactory.getByTypeAndUuid(entityType, id);
         Map<EntityKeyType, Map<String, TsValue>> latest = new HashMap<>();
         Map<String, TsValue[]> timeseries = new HashMap<>();
         EntityData entityData = new EntityData(entityId, latest, timeseries);
-        for (EntityKeyMapping mapping: selectionMapping) {
+        for (EntityKeyMapping mapping : selectionMapping) {
             if (!mapping.isIgnore()) {
                 EntityKey entityKey = mapping.getEntityKey();
-                Object value = row[mapping.getIndex()];
+                Object value = row.get(mapping.getValueAlias());
                 String strValue;
                 long ts;
                 if (entityKey.getType().equals(EntityKeyType.ENTITY_FIELD)) {
@@ -66,7 +68,7 @@ public class EntityDataAdapter {
                     ts = System.currentTimeMillis();
                 } else {
                     strValue = convertValue(value);
-                    Object tsObject = row[mapping.getIndex() + 1];
+                    Object tsObject = row.get(mapping.getTsAlias());
                     ts = tsObject != null ? Long.parseLong(tsObject.toString()) : 0;
                 }
                 TsValue tsValue = new TsValue(ts, strValue);

@@ -73,6 +73,7 @@ public class EntityKeyMapping {
     private boolean ignore = false;
     private List<KeyFilter> keyFilters;
     private EntityKey entityKey;
+    private int paramIdx = 0;
 
     public boolean hasFilter() {
         return keyFilters != null && !keyFilters.isEmpty();
@@ -95,23 +96,23 @@ public class EntityKeyMapping {
             String column = entityFieldColumnMap.get(entityKey.getKey());
             return String.format("e.%s as %s", column, getValueAlias());
         } else if (entityKey.getType().equals(EntityKeyType.TIME_SERIES)) {
-            return buildTimeseriesSelection();
+            return buildTimeSeriesSelection();
         } else {
             return buildAttributeSelection();
         }
     }
 
-    public Stream<String> toQueries() {
+    public Stream<String> toQueries(EntityQueryContext ctx) {
         if (hasFilter()) {
             String keyAlias = entityKey.getType().equals(EntityKeyType.ENTITY_FIELD) ? "e" : alias;
             return keyFilters.stream().map(keyFilter ->
-                    this.buildKeyQuery(keyAlias, keyFilter));
+                    this.buildKeyQuery(ctx, keyAlias, keyFilter));
         } else {
             return null;
         }
     }
 
-    public String toLatestJoin(EntityFilter entityFilter, EntityType entityType) {
+    public String toLatestJoin(EntityQueryContext ctx, EntityFilter entityFilter, EntityType entityType) {
         String entityTypeStr;
         if (entityFilter.getType().equals(EntityFilterType.RELATIONS_QUERY)) {
             entityTypeStr = "entities.entity_type";
@@ -119,12 +120,13 @@ public class EntityKeyMapping {
             entityTypeStr = "'" + entityType.name() + "'";
         }
         String join = hasFilter() ? "left join" : "left outer join";
+        ctx.addStringParameter(alias + "_key_id", entityKey.getKey());
         if (entityKey.getType().equals(EntityKeyType.TIME_SERIES)) {
-            // TODO:
-            throw new RuntimeException("Not implemented!");
+            return String.format("%s ts_kv_latest %s ON %s.entity_id=to_uuid(entities.id) AND %s.key = (select key_id from ts_kv_dictionary where key = :%s_key_id)",
+                    join, alias, alias, alias, alias);
         } else {
-            String query = String.format("%s attribute_kv %s ON %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key='%s'",
-                    join, alias, alias, alias, entityTypeStr, alias, entityKey.getKey());
+            String query = String.format("%s attribute_kv %s ON %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key=:%s_key_id",
+                    join, alias, alias, alias, entityTypeStr, alias, alias);
             if (!entityKey.getType().equals(EntityKeyType.ATTRIBUTE)) {
                 String scope;
                 if (entityKey.getType().equals(EntityKeyType.CLIENT_ATTRIBUTE)) {
@@ -145,13 +147,13 @@ public class EntityKeyMapping {
                 Collectors.joining(", "));
     }
 
-    public static String buildLatestJoins(EntityFilter entityFilter, EntityType entityType, List<EntityKeyMapping> latestMappings) {
-        return latestMappings.stream().map(mapping -> mapping.toLatestJoin(entityFilter, entityType)).collect(
+    public static String buildLatestJoins(EntityQueryContext ctx, EntityFilter entityFilter, EntityType entityType, List<EntityKeyMapping> latestMappings) {
+        return latestMappings.stream().map(mapping -> mapping.toLatestJoin(ctx, entityFilter, entityType)).collect(
                 Collectors.joining(" "));
     }
 
-    public static String buildQuery(List<EntityKeyMapping> mappings) {
-        return mappings.stream().flatMap(EntityKeyMapping::toQueries).collect(
+    public static String buildQuery(EntityQueryContext ctx, List<EntityKeyMapping> mappings) {
+        return mappings.stream().flatMap(mapping -> mapping.toQueries(ctx)).collect(
                 Collectors.joining(" AND "));
     }
 
@@ -250,40 +252,46 @@ public class EntityKeyMapping {
         return String.join(", ", attrValSelection, attrTsSelection);
     }
 
-    private String buildTimeseriesSelection() {
-        // TODO:
+    private String buildTimeSeriesSelection() {
         String attrValAlias = getValueAlias();
         String attrTsAlias = getTsAlias();
-        return String.format("(select '') as %s, (select 1) as %s", attrValAlias, attrTsAlias);
+        String attrValSelection =
+                String.format("(coalesce(cast(%s.bool_v as varchar), '') || " +
+                        "coalesce(%s.str_v, '') || " +
+                        "coalesce(cast(%s.long_v as varchar), '') || " +
+                        "coalesce(cast(%s.dbl_v as varchar), '') || " +
+                        "coalesce(cast(%s.json_v as varchar), '')) as %s", alias, alias, alias, alias, alias, attrValAlias);
+        String attrTsSelection = String.format("%s.ts as %s", alias, attrTsAlias);
+        return String.join(", ", attrValSelection, attrTsSelection);
     }
 
-    private String buildKeyQuery(String alias, KeyFilter keyFilter) {
-        return this.buildPredicateQuery(alias, keyFilter.getKey(), keyFilter.getPredicate());
+    private String buildKeyQuery(EntityQueryContext ctx, String alias, KeyFilter keyFilter) {
+        return this.buildPredicateQuery(ctx, alias, keyFilter.getKey(), keyFilter.getPredicate());
     }
 
-    private String buildPredicateQuery(String alias, EntityKey key, KeyFilterPredicate predicate) {
+    private String buildPredicateQuery(EntityQueryContext ctx, String alias, EntityKey key, KeyFilterPredicate predicate) {
         if (predicate.getType().equals(FilterPredicateType.COMPLEX)) {
-            return this.buildComplexPredicateQuery(alias, key, (ComplexFilterPredicate) predicate);
+            return this.buildComplexPredicateQuery(ctx, alias, key, (ComplexFilterPredicate) predicate);
         } else {
-            return this.buildSimplePredicateQuery(alias, key, predicate);
+            return this.buildSimplePredicateQuery(ctx, alias, key, predicate);
         }
     }
 
-    private String buildComplexPredicateQuery(String alias, EntityKey key, ComplexFilterPredicate predicate) {
+    private String buildComplexPredicateQuery(EntityQueryContext ctx, String alias, EntityKey key, ComplexFilterPredicate predicate) {
         return predicate.getPredicates().stream()
-                .map(keyFilterPredicate -> this.buildPredicateQuery(alias, key, keyFilterPredicate)).collect(Collectors.joining(
+                .map(keyFilterPredicate -> this.buildPredicateQuery(ctx, alias, key, keyFilterPredicate)).collect(Collectors.joining(
                         " " + predicate.getOperation().name() + " "
                 ));
     }
 
-    private String buildSimplePredicateQuery(String alias, EntityKey key, KeyFilterPredicate predicate) {
+    private String buildSimplePredicateQuery(EntityQueryContext ctx, String alias, EntityKey key, KeyFilterPredicate predicate) {
         if (predicate.getType().equals(FilterPredicateType.NUMERIC)) {
             if (key.getType().equals(EntityKeyType.ENTITY_FIELD)) {
                 String column = entityFieldColumnMap.get(key.getKey());
-                return this.buildNumericPredicateQuery(alias + "." + column, (NumericFilterPredicate) predicate);
+                return this.buildNumericPredicateQuery(ctx, alias + "." + column, (NumericFilterPredicate) predicate);
             } else {
-                String longQuery = this.buildNumericPredicateQuery(alias + ".long_v", (NumericFilterPredicate) predicate);
-                String doubleQuery = this.buildNumericPredicateQuery(alias + ".dbl_v", (NumericFilterPredicate) predicate);
+                String longQuery = this.buildNumericPredicateQuery(ctx, alias + ".long_v", (NumericFilterPredicate) predicate);
+                String doubleQuery = this.buildNumericPredicateQuery(ctx, alias + ".dbl_v", (NumericFilterPredicate) predicate);
                 return String.format("(%s or %s)", longQuery, doubleQuery);
             }
         } else {
@@ -295,15 +303,16 @@ public class EntityKeyMapping {
             }
             String field = alias + "." + column;
             if (predicate.getType().equals(FilterPredicateType.STRING)) {
-                return this.buildStringPredicateQuery(field, (StringFilterPredicate) predicate);
+                return this.buildStringPredicateQuery(ctx, field, (StringFilterPredicate) predicate);
             } else {
-                return this.buildBooleanPredicateQuery(field, (BooleanFilterPredicate) predicate);
+                return this.buildBooleanPredicateQuery(ctx, field, (BooleanFilterPredicate) predicate);
             }
         }
     }
 
-    private String buildStringPredicateQuery(String field, StringFilterPredicate stringFilterPredicate) {
+    private String buildStringPredicateQuery(EntityQueryContext ctx, String field, StringFilterPredicate stringFilterPredicate) {
         String operationField = field;
+        String paramName = getNextParameterName(field);
         String value = stringFilterPredicate.getValue();
         String stringOperationQuery = "";
         if (stringFilterPredicate.isIgnoreCase()) {
@@ -312,65 +321,77 @@ public class EntityKeyMapping {
         }
         switch (stringFilterPredicate.getOperation()) {
             case EQUAL:
-                stringOperationQuery = String.format("%s = '%s'", operationField, value);
+                stringOperationQuery = String.format("%s = :%s", operationField, paramName);
                 break;
             case NOT_EQUAL:
-                stringOperationQuery = String.format("%s != '%s'", operationField, value);
+                stringOperationQuery = String.format("%s != :%s", operationField, paramName);
                 break;
             case STARTS_WITH:
-                stringOperationQuery = String.format("%s like '%s%%'", operationField, value);
+                value += "%";
+                stringOperationQuery = String.format("%s like :%s", operationField, paramName);
                 break;
             case ENDS_WITH:
-                stringOperationQuery = String.format("%s like '%%%s'", operationField, value);
+                value = "%" + value;
+                stringOperationQuery = String.format("%s like :%s", operationField, paramName);
                 break;
             case CONTAINS:
-                stringOperationQuery = String.format("%s like '%%%s%%'", operationField, value);
+                value = "%" + value + "%";
+                stringOperationQuery = String.format("%s like :%s", operationField, paramName);
                 break;
             case NOT_CONTAINS:
-                stringOperationQuery = String.format("%s not like '%%%s%%'", operationField, value);
+                value = "%" + value + "%";
+                stringOperationQuery = String.format("%s not like :%s", operationField, paramName);
                 break;
         }
+        ctx.addStringParameter(paramName, value);
         return String.format("(%s is not null and %s)", field, stringOperationQuery);
     }
 
-    private String buildNumericPredicateQuery(String field, NumericFilterPredicate numericFilterPredicate) {
-        double value = numericFilterPredicate.getValue();
+    private String buildNumericPredicateQuery(EntityQueryContext ctx, String field, NumericFilterPredicate numericFilterPredicate) {
+        String paramName = getNextParameterName(field);
+        ctx.addDoubleParameter(paramName, numericFilterPredicate.getValue());
         String numericOperationQuery = "";
         switch (numericFilterPredicate.getOperation()) {
             case EQUAL:
-                numericOperationQuery = String.format("%s = %s", field, value);
+                numericOperationQuery = String.format("%s = :%s", field, paramName);
                 break;
             case NOT_EQUAL:
-                numericOperationQuery = String.format("%s != '%s'", field, value);
+                numericOperationQuery = String.format("%s != :%s", field, paramName);
                 break;
             case GREATER:
-                numericOperationQuery = String.format("%s > %s", field, value);
+                numericOperationQuery = String.format("%s > :%s", field, paramName);
                 break;
             case GREATER_OR_EQUAL:
-                numericOperationQuery = String.format("%s >= %s", field, value);
+                numericOperationQuery = String.format("%s >= :%s", field, paramName);
                 break;
             case LESS:
-                numericOperationQuery = String.format("%s < %s", field, value);
+                numericOperationQuery = String.format("%s < :%s", field, paramName);
                 break;
             case LESS_OR_EQUAL:
-                numericOperationQuery = String.format("%s <= %s", field, value);
+                numericOperationQuery = String.format("%s <= :%s", field, paramName);
                 break;
         }
         return String.format("(%s is not null and %s)", field, numericOperationQuery);
     }
 
-    private String buildBooleanPredicateQuery(String field,
+    private String buildBooleanPredicateQuery(EntityQueryContext ctx, String field,
                                               BooleanFilterPredicate booleanFilterPredicate) {
-        boolean value = booleanFilterPredicate.isValue();
+        String paramName = getNextParameterName(field);
+        ctx.addBooleanParameter(paramName, booleanFilterPredicate.isValue());
         String booleanOperationQuery = "";
         switch (booleanFilterPredicate.getOperation()) {
             case EQUAL:
-                booleanOperationQuery = String.format("%s = %s", field, value);
+                booleanOperationQuery = String.format("%s = :%s", field, paramName);
                 break;
             case NOT_EQUAL:
-                booleanOperationQuery = String.format("%s != %s", field, value);
+                booleanOperationQuery = String.format("%s != :%s", field, paramName);
                 break;
         }
         return String.format("(%s is not null and %s)", field, booleanOperationQuery);
     }
+
+    private String getNextParameterName(String field) {
+        paramIdx++;
+        return field.replace(".", "_") + "_" + paramIdx;
+    }
 }

+/**
+ * Copyright © 2016-2020 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.dao.sql.query;
+
+import org.hibernate.type.PostgresUUIDType;
+import org.springframework.jdbc.core.namedparam.SqlParameterSource;
+
+import java.sql.Types;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+public class EntityQueryContext implements SqlParameterSource {
+    private static final PostgresUUIDType UUID_TYPE = new PostgresUUIDType();
+
+    private final StringBuilder query;
+    private final Map<String, Parameter> params;
+
+    public EntityQueryContext() {
+        query = new StringBuilder();
+        params = new HashMap<>();
+    }
+
+    void addParameter(String name, Object value, int type, String typeName) {
+        Parameter existing = params.put(name, new Parameter(value, type, typeName));
+        if (existing != null) {
+            throw new RuntimeException("Parameter with name: " + name + " was already registered!");
+        }
+    }
+
+    public void append(String s) {
+        query.append(s);
+    }
+
+    @Override
+    public boolean hasValue(String paramName) {
+        return params.containsKey(paramName);
+    }
+
+    @Override
+    public Object getValue(String paramName) throws IllegalArgumentException {
+        return checkParameter(paramName).value;
+    }
+
+    @Override
+    public int getSqlType(String paramName) {
+        return checkParameter(paramName).type;
+    }
+
+    private Parameter checkParameter(String paramName) {
+        Parameter param = params.get(paramName);
+        if (param == null) {
+            throw new RuntimeException("Parameter with name: " + paramName + " is not set!");
+        }
+        return param;
+    }
+
+    @Override
+    public String getTypeName(String paramName) {
+        return params.get(paramName).name;
+    }
+
+    @Override
+    public String[] getParameterNames() {
+        return params.keySet().toArray(new String[]{});
+    }
+
+    public void addUuidParameter(String name, UUID value) {
+        addParameter(name, value, UUID_TYPE.sqlType(), UUID_TYPE.getName());
+    }
+
+    public void addStringParameter(String name, String value) {
+        addParameter(name, value, Types.VARCHAR, "VARCHAR");
+    }
+
+    public void addDoubleParameter(String name, double value) {
+        addParameter(name, value, Types.DOUBLE, "DOUBLE");
+    }
+
+    public void addStringListParameter(String name, List<String> value) {
+        addParameter(name, value, Types.VARCHAR, "VARCHAR");
+    }
+
+    public void addBooleanParameter(String name, boolean value) {
+        addParameter(name, value, Types.BOOLEAN, "BOOLEAN");
+    }
+
+    public void addUuidListParameter(String name, List<UUID> value) {
+        addParameter(name, value, UUID_TYPE.sqlType(), UUID_TYPE.getName());
+    }
+
+    public String getQuery() {
+        return query.toString();
+    }
+
+
+    public static class Parameter {
+        private final Object value;
+        private final int type;
+        private final String name;
+
+        public Parameter(Object value, int type, String name) {
+            this.value = value;
+            this.type = type;
+            this.name = name;
+        }
+    }
+}

@@ -22,6 +22,8 @@ import org.thingsboard.server.dao.model.sql.RelationEntity;
 import org.thingsboard.server.dao.util.HsqlDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import javax.persistence.Query;
+
 @HsqlDao
 @SqlDao
 @Repository
@@ -30,9 +32,25 @@ public class HsqlRelationInsertRepository extends AbstractRelationInsertReposito
 
     private static final String INSERT_ON_CONFLICT_DO_UPDATE = "MERGE INTO relation USING (VALUES :fromId, :fromType, :toId, :toType, :relationTypeGroup, :relationType, :additionalInfo) R " +
             "(from_id, from_type, to_id, to_type, relation_type_group, relation_type, additional_info) " +
-            "ON (relation.from_id = R.from_id AND relation.from_type = R.from_type AND relation.relation_type_group = R.relation_type_group AND relation.relation_type = R.relation_type AND relation.to_id = R.to_id AND relation.to_type = R.to_type) " +
+            "ON (relation.from_id = UUID(R.from_id) AND relation.from_type = R.from_type AND relation.relation_type_group = R.relation_type_group AND relation.relation_type = R.relation_type AND relation.to_id = UUID(R.to_id) AND relation.to_type = R.to_type) " +
             "WHEN MATCHED THEN UPDATE SET relation.additional_info = R.additional_info " +
-            "WHEN NOT MATCHED THEN INSERT (from_id, from_type, to_id, to_type, relation_type_group, relation_type, additional_info) VALUES (R.from_id, R.from_type, R.to_id, R.to_type, R.relation_type_group, R.relation_type, R.additional_info)";
+            "WHEN NOT MATCHED THEN INSERT (from_id, from_type, to_id, to_type, relation_type_group, relation_type, additional_info) VALUES (UUID(R.from_id), R.from_type, UUID(R.to_id), R.to_type, R.relation_type_group, R.relation_type, R.additional_info)";
+
+    protected Query getQuery(RelationEntity entity, String query) {
+        Query nativeQuery = entityManager.createNativeQuery(query, RelationEntity.class);
+        if (entity.getAdditionalInfo() == null) {
+            nativeQuery.setParameter("additionalInfo", null);
+        } else {
+            nativeQuery.setParameter("additionalInfo", entity.getAdditionalInfo().toString());
+        }
+        return nativeQuery
+                .setParameter("fromId", entity.getFromId().toString())
+                .setParameter("fromType", entity.getFromType())
+                .setParameter("toId", entity.getToId().toString())
+                .setParameter("toType", entity.getToType())
+                .setParameter("relationTypeGroup", entity.getRelationTypeGroup())
+                .setParameter("relationType", entity.getRelationType());
+    }
 
     @Override
     public RelationEntity saveOrUpdate(RelationEntity entity) {

@@ -44,8 +44,6 @@ import javax.persistence.criteria.Predicate;
 import java.util.ArrayList;
 import java.util.List;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-
 /**
  * Created by Valerii Sosliuk on 5/29/2017.
  */
@@ -64,7 +62,7 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
     public ListenableFuture<List<EntityRelation>> findAllByFrom(TenantId tenantId, EntityId from, RelationTypeGroup typeGroup) {
         return service.submit(() -> DaoUtil.convertDataList(
                 relationRepository.findAllByFromIdAndFromTypeAndRelationTypeGroup(
-                        UUIDConverter.fromTimeUUID(from.getId()),
+                        from.getId(),
                         from.getEntityType().name(),
                         typeGroup.name())));
     }
@@ -73,7 +71,7 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
     public ListenableFuture<List<EntityRelation>> findAllByFromAndType(TenantId tenantId, EntityId from, String relationType, RelationTypeGroup typeGroup) {
         return service.submit(() -> DaoUtil.convertDataList(
                 relationRepository.findAllByFromIdAndFromTypeAndRelationTypeAndRelationTypeGroup(
-                        UUIDConverter.fromTimeUUID(from.getId()),
+                        from.getId(),
                         from.getEntityType().name(),
                         relationType,
                         typeGroup.name())));
@@ -83,7 +81,7 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
     public ListenableFuture<List<EntityRelation>> findAllByTo(TenantId tenantId, EntityId to, RelationTypeGroup typeGroup) {
         return service.submit(() -> DaoUtil.convertDataList(
                 relationRepository.findAllByToIdAndToTypeAndRelationTypeGroup(
-                        UUIDConverter.fromTimeUUID(to.getId()),
+                        to.getId(),
                         to.getEntityType().name(),
                         typeGroup.name())));
     }
@@ -92,7 +90,7 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
     public ListenableFuture<List<EntityRelation>> findAllByToAndType(TenantId tenantId, EntityId to, String relationType, RelationTypeGroup typeGroup) {
         return service.submit(() -> DaoUtil.convertDataList(
                 relationRepository.findAllByToIdAndToTypeAndRelationTypeAndRelationTypeGroup(
-                        UUIDConverter.fromTimeUUID(to.getId()),
+                        to.getId(),
                         to.getEntityType().name(),
                         relationType,
                         typeGroup.name())));
@@ -111,9 +109,9 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
     }
 
     private RelationCompositeKey getRelationCompositeKey(EntityId from, EntityId to, String relationType, RelationTypeGroup typeGroup) {
-        return new RelationCompositeKey(fromTimeUUID(from.getId()),
+        return new RelationCompositeKey(from.getId(),
                 from.getEntityType().name(),
-                fromTimeUUID(to.getId()),
+                to.getId(),
                 to.getEntityType().name(),
                 relationType,
                 typeGroup.name());
@@ -166,10 +164,10 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
     @Override
     public boolean deleteOutboundRelations(TenantId tenantId, EntityId entity) {
         boolean relationExistsBeforeDelete = relationRepository
-                .findAllByFromIdAndFromType(UUIDConverter.fromTimeUUID(entity.getId()), entity.getEntityType().name())
+                .findAllByFromIdAndFromType(entity.getId(), entity.getEntityType().name())
                 .size() > 0;
         if (relationExistsBeforeDelete) {
-            relationRepository.deleteByFromIdAndFromType(UUIDConverter.fromTimeUUID(entity.getId()), entity.getEntityType().name());
+            relationRepository.deleteByFromIdAndFromType(entity.getId(), entity.getEntityType().name());
         }
         return relationExistsBeforeDelete;
     }
@@ -179,33 +177,20 @@ public class JpaRelationDao extends JpaAbstractDaoListeningExecutorService imple
         return service.submit(
                 () -> {
                     boolean relationExistsBeforeDelete = relationRepository
-                            .findAllByFromIdAndFromType(UUIDConverter.fromTimeUUID(entity.getId()), entity.getEntityType().name())
+                            .findAllByFromIdAndFromType(entity.getId(), entity.getEntityType().name())
                             .size() > 0;
                     if (relationExistsBeforeDelete) {
-                        relationRepository.deleteByFromIdAndFromType(UUIDConverter.fromTimeUUID(entity.getId()), entity.getEntityType().name());
+                        relationRepository.deleteByFromIdAndFromType(entity.getId(), entity.getEntityType().name());
                     }
                     return relationExistsBeforeDelete;
                 });
     }
 
-    @Override
-    public ListenableFuture<PageData<EntityRelation>> findRelations(TenantId tenantId, EntityId from, String relationType, RelationTypeGroup typeGroup, EntityType childType, TimePageLink pageLink) {
-        Specification<RelationEntity> timeSearchSpec = JpaAbstractSearchTimeDao.getTimeSearchPageSpec(pageLink, "toId");
-        Specification<RelationEntity> fieldsSpec = getEntityFieldsSpec(from, relationType, typeGroup, childType);
-        Sort.Direction sortDirection = Sort.Direction.DESC;
-        if (pageLink.getSortOrder() != null) {
-            sortDirection = pageLink.getSortOrder().getDirection() == SortOrder.Direction.ASC ? Sort.Direction.ASC : Sort.Direction.DESC;
-        }
-        Pageable pageable = PageRequest.of(pageLink.getPage(), pageLink.getPageSize(), sortDirection, "toId");
-        return service.submit(() ->
-                DaoUtil.toPageData(relationRepository.findAll(Specification.where(timeSearchSpec).and(fieldsSpec), pageable)));
-    }
-
     private Specification<RelationEntity> getEntityFieldsSpec(EntityId from, String relationType, RelationTypeGroup typeGroup, EntityType childType) {
         return (root, criteriaQuery, criteriaBuilder) -> {
             List<Predicate> predicates = new ArrayList<>();
             if (from != null) {
-                Predicate fromIdPredicate = criteriaBuilder.equal(root.get("fromId"),  UUIDConverter.fromTimeUUID(from.getId()));
+                Predicate fromIdPredicate = criteriaBuilder.equal(root.get("fromId"),  from.getId());
                 predicates.add(fromIdPredicate);
                 Predicate fromEntityTypePredicate = criteriaBuilder.equal(root.get("fromType"), from.getEntityType().name());
                 predicates.add(fromEntityTypePredicate);

@@ -23,30 +23,31 @@ import org.thingsboard.server.dao.model.sql.RelationEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 @SqlDao
 public interface RelationRepository
         extends CrudRepository<RelationEntity, RelationCompositeKey>, JpaSpecificationExecutor<RelationEntity> {
 
-    List<RelationEntity> findAllByFromIdAndFromTypeAndRelationTypeGroup(String fromId,
+    List<RelationEntity> findAllByFromIdAndFromTypeAndRelationTypeGroup(UUID fromId,
                                                                         String fromType,
                                                                         String relationTypeGroup);
 
-    List<RelationEntity> findAllByFromIdAndFromTypeAndRelationTypeAndRelationTypeGroup(String fromId,
+    List<RelationEntity> findAllByFromIdAndFromTypeAndRelationTypeAndRelationTypeGroup(UUID fromId,
                                                                                        String fromType,
                                                                                        String relationType,
                                                                                        String relationTypeGroup);
 
-    List<RelationEntity> findAllByToIdAndToTypeAndRelationTypeGroup(String toId,
+    List<RelationEntity> findAllByToIdAndToTypeAndRelationTypeGroup(UUID toId,
                                                                     String toType,
                                                                     String relationTypeGroup);
 
-    List<RelationEntity> findAllByToIdAndToTypeAndRelationTypeAndRelationTypeGroup(String toId,
+    List<RelationEntity> findAllByToIdAndToTypeAndRelationTypeAndRelationTypeGroup(UUID toId,
                                                                                    String toType,
                                                                                    String relationType,
                                                                                    String relationTypeGroup);
 
-    List<RelationEntity> findAllByFromIdAndFromType(String fromId,
+    List<RelationEntity> findAllByFromIdAndFromType(UUID fromId,
                                                     String fromType);
 
     @Transactional
@@ -56,5 +57,5 @@ public interface RelationRepository
     void deleteById(RelationCompositeKey id);
 
     @Transactional
-    void deleteByFromIdAndFromType(String fromId, String fromType);
+    void deleteByFromIdAndFromType(UUID fromId, String fromType);
 }

@@ -17,10 +17,8 @@ package org.thingsboard.server.dao.sql.rule;
 
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.domain.PageRequest;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.rule.RuleChain;
@@ -30,12 +28,9 @@ import org.thingsboard.server.dao.rule.RuleChainDao;
 import org.thingsboard.server.dao.sql.JpaAbstractSearchTextDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
 import java.util.Objects;
 import java.util.UUID;
 
-import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID_STR;
-
 @Slf4j
 @Component
 @SqlDao
@@ -58,7 +53,7 @@ public class JpaRuleChainDao extends JpaAbstractSearchTextDao<RuleChainEntity, R
     public PageData<RuleChain> findRuleChainsByTenantId(UUID tenantId, PageLink pageLink) {
         return DaoUtil.toPageData(ruleChainRepository
                 .findByTenantId(
-                        UUIDConverter.fromTimeUUID(tenantId),
+                        tenantId,
                         Objects.toString(pageLink.getTextSearch(), ""),
                         DaoUtil.toPageable(pageLink)));
     }

@@ -18,20 +18,19 @@ package org.thingsboard.server.dao.sql.rule;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.RuleChainEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 @SqlDao
-public interface RuleChainRepository extends PagingAndSortingRepository<RuleChainEntity, String> {
+public interface RuleChainRepository extends PagingAndSortingRepository<RuleChainEntity, UUID> {
 
     @Query("SELECT rc FROM RuleChainEntity rc WHERE rc.tenantId = :tenantId " +
             "AND LOWER(rc.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<RuleChainEntity> findByTenantId(@Param("tenantId") String tenantId,
+    Page<RuleChainEntity> findByTenantId(@Param("tenantId") UUID tenantId,
                                          @Param("searchText") String searchText,
                                          Pageable pageable);
 

@@ -18,10 +18,12 @@ package org.thingsboard.server.dao.sql.settings;
 import org.springframework.data.repository.CrudRepository;
 import org.thingsboard.server.dao.model.sql.AdminSettingsEntity;
 
+import java.util.UUID;
+
 /**
  * Created by Valerii Sosliuk on 5/6/2017.
  */
-public interface AdminSettingsRepository extends CrudRepository<AdminSettingsEntity, String> {
+public interface AdminSettingsRepository extends CrudRepository<AdminSettingsEntity, UUID> {
 
     AdminSettingsEntity findByKey(String key);
 }

@@ -27,6 +27,8 @@ import org.thingsboard.server.dao.settings.AdminSettingsDao;
 import org.thingsboard.server.dao.sql.JpaAbstractDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import java.util.UUID;
+
 @Component
 @Slf4j
 @SqlDao
@@ -41,7 +43,7 @@ public class JpaAdminSettingsDao extends JpaAbstractDao<AdminSettingsEntity, Adm
     }
 
     @Override
-    protected CrudRepository<AdminSettingsEntity, String> getCrudRepository() {
+    protected CrudRepository<AdminSettingsEntity, UUID> getCrudRepository() {
         return adminSettingsRepository;
     }
 

@@ -29,6 +29,7 @@ import org.thingsboard.server.dao.tenant.TenantDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.Objects;
+import java.util.UUID;
 
 
 /**
@@ -47,7 +48,7 @@ public class JpaTenantDao extends JpaAbstractSearchTextDao<TenantEntity, Tenant>
     }
 
     @Override
-    protected CrudRepository<TenantEntity, String> getCrudRepository() {
+    protected CrudRepository<TenantEntity, UUID> getCrudRepository() {
         return tenantRepository;
     }
 

@@ -18,19 +18,18 @@ package org.thingsboard.server.dao.sql.tenant;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.TenantEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 4/30/2017.
  */
 @SqlDao
-public interface TenantRepository extends PagingAndSortingRepository<TenantEntity, String> {
+public interface TenantRepository extends PagingAndSortingRepository<TenantEntity, UUID> {
 
     @Query("SELECT t FROM TenantEntity t WHERE t.region = :region " +
             "AND LOWER(t.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.user;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.security.UserCredentials;
 import org.thingsboard.server.dao.DaoUtil;
@@ -45,13 +44,13 @@ public class JpaUserCredentialsDao extends JpaAbstractDao<UserCredentialsEntity,
     }
 
     @Override
-    protected CrudRepository<UserCredentialsEntity, String> getCrudRepository() {
+    protected CrudRepository<UserCredentialsEntity, UUID> getCrudRepository() {
         return userCredentialsRepository;
     }
 
     @Override
     public UserCredentials findByUserId(TenantId tenantId, UUID userId) {
-        return DaoUtil.getData(userCredentialsRepository.findByUserId(UUIDConverter.fromTimeUUID(userId)));
+        return DaoUtil.getData(userCredentialsRepository.findByUserId(userId));
     }
 
     @Override

@@ -32,8 +32,7 @@ import org.thingsboard.server.dao.util.SqlDao;
 import java.util.Objects;
 import java.util.UUID;
 
-import static org.thingsboard.server.common.data.UUIDConverter.fromTimeUUID;
-import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID_STR;
+import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID;
 
 /**
  * @author Valerii Sosliuk
@@ -51,7 +50,7 @@ public class JpaUserDao extends JpaAbstractSearchTextDao<UserEntity, User> imple
     }
 
     @Override
-    protected CrudRepository<UserEntity, String> getCrudRepository() {
+    protected CrudRepository<UserEntity, UUID> getCrudRepository() {
         return userRepository;
     }
 
@@ -65,8 +64,8 @@ public class JpaUserDao extends JpaAbstractSearchTextDao<UserEntity, User> imple
         return DaoUtil.toPageData(
                 userRepository
                         .findUsersByAuthority(
-                                fromTimeUUID(tenantId),
-                                NULL_UUID_STR,
+                                tenantId,
+                                NULL_UUID,
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 Authority.TENANT_ADMIN,
                                 DaoUtil.toPageable(pageLink)));
@@ -77,8 +76,8 @@ public class JpaUserDao extends JpaAbstractSearchTextDao<UserEntity, User> imple
         return DaoUtil.toPageData(
                 userRepository
                         .findUsersByAuthority(
-                                fromTimeUUID(tenantId),
-                                fromTimeUUID(customerId),
+                                tenantId,
+                                customerId,
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 Authority.CUSTOMER_USER,
                                 DaoUtil.toPageable(pageLink)));

@@ -19,13 +19,15 @@ import org.springframework.data.repository.CrudRepository;
 import org.thingsboard.server.dao.model.sql.UserCredentialsEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
+import java.util.UUID;
+
 /**
  * Created by Valerii Sosliuk on 4/22/2017.
  */
 @SqlDao
-public interface UserCredentialsRepository extends CrudRepository<UserCredentialsEntity, String> {
+public interface UserCredentialsRepository extends CrudRepository<UserCredentialsEntity, UUID> {
 
-    UserCredentialsEntity findByUserId(String userId);
+    UserCredentialsEntity findByUserId(UUID userId);
 
     UserCredentialsEntity findByActivateToken(String activateToken);
 

@@ -18,28 +18,27 @@ package org.thingsboard.server.dao.sql.user;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.common.data.security.Authority;
 import org.thingsboard.server.dao.model.sql.UserEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 /**
  * @author Valerii Sosliuk
  */
 @SqlDao
-public interface UserRepository extends PagingAndSortingRepository<UserEntity, String> {
+public interface UserRepository extends PagingAndSortingRepository<UserEntity, UUID> {
 
     UserEntity findByEmail(String email);
 
     @Query("SELECT u FROM UserEntity u WHERE u.tenantId = :tenantId " +
             "AND u.customerId = :customerId AND u.authority = :authority " +
             "AND LOWER(u.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<UserEntity> findUsersByAuthority(@Param("tenantId") String tenantId,
-                                          @Param("customerId") String customerId,
+    Page<UserEntity> findUsersByAuthority(@Param("tenantId") UUID tenantId,
+                                          @Param("customerId") UUID customerId,
                                           @Param("searchText") String searchText,
                                           @Param("authority") Authority authority,
                                           Pageable pageable);

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.widget;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.widget.WidgetType;
 import org.thingsboard.server.dao.DaoUtil;
 import org.thingsboard.server.dao.model.sql.WidgetTypeEntity;
@@ -45,17 +44,17 @@ public class JpaWidgetTypeDao extends JpaAbstractDao<WidgetTypeEntity, WidgetTyp
     }
 
     @Override
-    protected CrudRepository<WidgetTypeEntity, String> getCrudRepository() {
+    protected CrudRepository<WidgetTypeEntity, UUID> getCrudRepository() {
         return widgetTypeRepository;
     }
 
     @Override
     public List<WidgetType> findWidgetTypesByTenantIdAndBundleAlias(UUID tenantId, String bundleAlias) {
-        return DaoUtil.convertDataList(widgetTypeRepository.findByTenantIdAndBundleAlias(UUIDConverter.fromTimeUUID(tenantId), bundleAlias));
+        return DaoUtil.convertDataList(widgetTypeRepository.findByTenantIdAndBundleAlias(tenantId, bundleAlias));
     }
 
     @Override
     public WidgetType findByTenantIdBundleAliasAndAlias(UUID tenantId, String bundleAlias, String alias) {
-        return DaoUtil.getData(widgetTypeRepository.findByTenantIdAndBundleAliasAndAlias(UUIDConverter.fromTimeUUID(tenantId), bundleAlias, alias));
+        return DaoUtil.getData(widgetTypeRepository.findByTenantIdAndBundleAliasAndAlias(tenantId, bundleAlias, alias));
     }
 }

@@ -18,7 +18,6 @@ package org.thingsboard.server.dao.sql.widget;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Component;
-import org.thingsboard.server.common.data.UUIDConverter;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
@@ -32,7 +31,7 @@ import org.thingsboard.server.dao.widget.WidgetsBundleDao;
 import java.util.Objects;
 import java.util.UUID;
 
-import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID_STR;
+import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID;
 
 /**
  * Created by Valerii Sosliuk on 4/23/2017.
@@ -50,13 +49,13 @@ public class JpaWidgetsBundleDao extends JpaAbstractSearchTextDao<WidgetsBundleE
     }
 
     @Override
-    protected CrudRepository<WidgetsBundleEntity, String> getCrudRepository() {
+    protected CrudRepository<WidgetsBundleEntity, UUID> getCrudRepository() {
         return widgetsBundleRepository;
     }
 
     @Override
     public WidgetsBundle findWidgetsBundleByTenantIdAndAlias(UUID tenantId, String alias) {
-        return DaoUtil.getData(widgetsBundleRepository.findWidgetsBundleByTenantIdAndAlias(UUIDConverter.fromTimeUUID(tenantId), alias));
+        return DaoUtil.getData(widgetsBundleRepository.findWidgetsBundleByTenantIdAndAlias(tenantId, alias));
     }
 
     @Override
@@ -64,7 +63,7 @@ public class JpaWidgetsBundleDao extends JpaAbstractSearchTextDao<WidgetsBundleE
         return DaoUtil.toPageData(
                 widgetsBundleRepository
                         .findSystemWidgetsBundles(
-                                NULL_UUID_STR,
+                                NULL_UUID,
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 DaoUtil.toPageable(pageLink)));
     }
@@ -74,7 +73,7 @@ public class JpaWidgetsBundleDao extends JpaAbstractSearchTextDao<WidgetsBundleE
         return DaoUtil.toPageData(
                 widgetsBundleRepository
                         .findTenantWidgetsBundlesByTenantId(
-                                UUIDConverter.fromTimeUUID(tenantId),
+                                tenantId,
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 DaoUtil.toPageable(pageLink)));
     }
@@ -84,8 +83,8 @@ public class JpaWidgetsBundleDao extends JpaAbstractSearchTextDao<WidgetsBundleE
         return DaoUtil.toPageData(
                 widgetsBundleRepository
                         .findAllTenantWidgetsBundlesByTenantId(
-                                UUIDConverter.fromTimeUUID(tenantId),
-                                NULL_UUID_STR,
+                                tenantId,
+                                NULL_UUID,
                                 Objects.toString(pageLink.getTextSearch(), ""),
                                 DaoUtil.toPageable(pageLink)));
     }

@@ -20,14 +20,15 @@ import org.thingsboard.server.dao.model.sql.WidgetTypeEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 4/29/2017.
  */
 @SqlDao
-public interface WidgetTypeRepository extends CrudRepository<WidgetTypeEntity, String> {
+public interface WidgetTypeRepository extends CrudRepository<WidgetTypeEntity, UUID> {
 
-    List<WidgetTypeEntity> findByTenantIdAndBundleAlias(String tenantId, String bundleAlias);
+    List<WidgetTypeEntity> findByTenantIdAndBundleAlias(UUID tenantId, String bundleAlias);
 
-    WidgetTypeEntity findByTenantIdAndBundleAliasAndAlias(String tenantId, String bundleAlias, String alias);
+    WidgetTypeEntity findByTenantIdAndBundleAliasAndAlias(UUID tenantId, String bundleAlias, String alias);
 }

@@ -18,38 +18,37 @@ package org.thingsboard.server.dao.sql.widget;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.Param;
 import org.thingsboard.server.dao.model.sql.WidgetsBundleEntity;
 import org.thingsboard.server.dao.util.SqlDao;
 
-import java.util.List;
+import java.util.UUID;
 
 /**
  * Created by Valerii Sosliuk on 4/23/2017.
  */
 @SqlDao
-public interface WidgetsBundleRepository extends PagingAndSortingRepository<WidgetsBundleEntity, String> {
+public interface WidgetsBundleRepository extends PagingAndSortingRepository<WidgetsBundleEntity, UUID> {
 
-    WidgetsBundleEntity findWidgetsBundleByTenantIdAndAlias(String tenantId, String alias);
+    WidgetsBundleEntity findWidgetsBundleByTenantIdAndAlias(UUID tenantId, String alias);
 
     @Query("SELECT wb FROM WidgetsBundleEntity wb WHERE wb.tenantId = :systemTenantId " +
             "AND LOWER(wb.searchText) LIKE LOWER(CONCAT(:searchText, '%'))")
-    Page<WidgetsBundleEntity> findSystemWidgetsBundles(@Param("systemTenantId") String systemTenantId,
+    Page<WidgetsBundleEntity> findSystemWidgetsBundles(@Param("systemTenantId") UUID systemTenantId,
                                                        @Param("searchText") String searchText,
                                                        Pageable pageable);
 
     @Query("SELECT wb FROM WidgetsBundleEntity wb WHERE wb.tenantId = :tenantId " +
             "AND LOWER(wb.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<WidgetsBundleEntity> findTenantWidgetsBundlesByTenantId(@Param("tenantId") String tenantId,
+    Page<WidgetsBundleEntity> findTenantWidgetsBundlesByTenantId(@Param("tenantId") UUID tenantId,
                                                                  @Param("textSearch") String textSearch,
                                                                  Pageable pageable);
 
     @Query("SELECT wb FROM WidgetsBundleEntity wb WHERE wb.tenantId IN (:tenantId, :nullTenantId) " +
             "AND LOWER(wb.searchText) LIKE LOWER(CONCAT(:textSearch, '%'))")
-    Page<WidgetsBundleEntity> findAllTenantWidgetsBundlesByTenantId(@Param("tenantId") String tenantId,
-                                                                    @Param("nullTenantId") String nullTenantId,
+    Page<WidgetsBundleEntity> findAllTenantWidgetsBundlesByTenantId(@Param("tenantId") UUID tenantId,
+                                                                    @Param("nullTenantId") UUID nullTenantId,
                                                                     @Param("textSearch") String textSearch,
                                                                     Pageable pageable);
 }

@@ -21,8 +21,6 @@ import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
-
 public interface TenantDao extends Dao<Tenant> {
 
     /**

@@ -21,7 +21,6 @@ import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.thingsboard.server.common.data.Tenant;
-import org.thingsboard.server.common.data.asset.Asset;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
@@ -40,8 +39,6 @@ import org.thingsboard.server.dao.service.Validator;
 import org.thingsboard.server.dao.user.UserService;
 import org.thingsboard.server.dao.widget.WidgetsBundleService;
 
-import java.util.List;
-
 import static org.thingsboard.server.dao.service.Validator.validateId;
 
 @Service

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.dao.timeseries;
 
-import com.datastax.oss.driver.api.core.cql.AsyncResultSet;
 import com.datastax.oss.driver.api.core.cql.Row;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;

@@ -21,7 +21,6 @@ import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.UUID;
 
 public interface UserDao extends Dao<User> {

@@ -46,7 +46,6 @@ import org.thingsboard.server.dao.service.PaginatedRemover;
 import org.thingsboard.server.dao.tenant.TenantDao;
 
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 
 import static org.thingsboard.server.dao.service.Validator.validateId;

@@ -35,7 +35,15 @@ import org.thingsboard.server.dao.nosql.CassandraStatementTask;
 
 import javax.annotation.Nullable;
 import java.util.UUID;
-import java.util.concurrent.*;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.regex.Matcher;
 

@@ -21,7 +21,6 @@ import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.widget.WidgetsBundle;
 import org.thingsboard.server.dao.Dao;
 
-import java.util.List;
 import java.util.UUID;
 
 /**

@@ -16,48 +16,52 @@
 
 
 CREATE TABLE IF NOT EXISTS admin_settings (
-    id varchar(31) NOT NULL CONSTRAINT admin_settings_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT admin_settings_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     json_value varchar,
     key varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS alarm (
-    id varchar(31) NOT NULL CONSTRAINT alarm_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT alarm_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     ack_ts bigint,
     clear_ts bigint,
     additional_info varchar,
     end_ts bigint,
-    originator_id varchar(31),
+    originator_id uuid,
     originator_type integer,
     propagate boolean,
     severity varchar(255),
     start_ts bigint,
     status varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     propagate_relation_types varchar,
     type varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS asset (
-    id varchar(31) NOT NULL CONSTRAINT asset_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT asset_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
-    customer_id varchar(31),
+    customer_id uuid,
     name varchar(255),
     label varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     type varchar(255),
     CONSTRAINT asset_name_unq_key UNIQUE (tenant_id, name)
 );
 
 CREATE TABLE IF NOT EXISTS audit_log (
-    id varchar(31) NOT NULL CONSTRAINT audit_log_pkey PRIMARY KEY,
-    tenant_id varchar(31),
-    customer_id varchar(31),
-    entity_id varchar(31),
+    id uuid NOT NULL CONSTRAINT audit_log_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
+    tenant_id uuid,
+    customer_id uuid,
+    entity_id uuid,
     entity_type varchar(255),
     entity_name varchar(255),
-    user_id varchar(31),
+    user_id uuid,
     user_name varchar(255),
     action_type varchar(255),
     action_data varchar(1000000),
@@ -67,7 +71,7 @@ CREATE TABLE IF NOT EXISTS audit_log (
 
 CREATE TABLE IF NOT EXISTS attribute_kv (
   entity_type varchar(255),
-  entity_id varchar(31),
+  entity_id uuid,
   attribute_type varchar(255),
   attribute_key varchar(255),
   bool_v boolean,
@@ -80,7 +84,8 @@ CREATE TABLE IF NOT EXISTS attribute_kv (
 );
 
 CREATE TABLE IF NOT EXISTS component_descriptor (
-    id varchar(31) NOT NULL CONSTRAINT component_descriptor_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT component_descriptor_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     actions varchar(255),
     clazz varchar UNIQUE,
     configuration_descriptor varchar,
@@ -91,7 +96,8 @@ CREATE TABLE IF NOT EXISTS component_descriptor (
 );
 
 CREATE TABLE IF NOT EXISTS customer (
-    id varchar(31) NOT NULL CONSTRAINT customer_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT customer_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     address varchar,
     address2 varchar,
@@ -101,57 +107,61 @@ CREATE TABLE IF NOT EXISTS customer (
     phone varchar(255),
     search_text varchar(255),
     state varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     title varchar(255),
     zip varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS dashboard (
-    id varchar(31) NOT NULL CONSTRAINT dashboard_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT dashboard_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     configuration varchar(10000000),
     assigned_customers varchar(1000000),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     title varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS device (
-    id varchar(31) NOT NULL CONSTRAINT device_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT device_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
-    customer_id varchar(31),
+    customer_id uuid,
     type varchar(255),
     name varchar(255),
     label varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     CONSTRAINT device_name_unq_key UNIQUE (tenant_id, name)
 );
 
 CREATE TABLE IF NOT EXISTS device_credentials (
-    id varchar(31) NOT NULL CONSTRAINT device_credentials_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT device_credentials_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     credentials_id varchar,
     credentials_type varchar(255),
     credentials_value varchar,
-    device_id varchar(31),
+    device_id uuid,
     CONSTRAINT device_credentials_id_unq_key UNIQUE (credentials_id)
 );
 
 CREATE TABLE IF NOT EXISTS event (
-    id varchar(31) NOT NULL CONSTRAINT event_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT event_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     body varchar(10000000),
-    entity_id varchar(31),
+    entity_id uuid,
     entity_type varchar(255),
     event_type varchar(255),
     event_uid varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     ts bigint NOT NULL,
     CONSTRAINT event_unq_key UNIQUE (tenant_id, entity_type, entity_id, event_type, event_uid)
 );
 
 CREATE TABLE IF NOT EXISTS relation (
-    from_id varchar(31),
+    from_id uuid,
     from_type varchar(255),
-    to_id varchar(31),
+    to_id uuid,
     to_type varchar(255),
     relation_type_group varchar(255),
     relation_type varchar(255),
@@ -160,19 +170,21 @@ CREATE TABLE IF NOT EXISTS relation (
 );
 
 CREATE TABLE IF NOT EXISTS tb_user (
-    id varchar(31) NOT NULL CONSTRAINT tb_user_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT tb_user_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     authority varchar(255),
-    customer_id varchar(31),
+    customer_id uuid,
     email varchar(255) UNIQUE,
     first_name varchar(255),
     last_name varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31)
+    tenant_id uuid
 );
 
 CREATE TABLE IF NOT EXISTS tenant (
-    id varchar(31) NOT NULL CONSTRAINT tenant_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT tenant_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     address varchar,
     address2 varchar,
@@ -190,46 +202,51 @@ CREATE TABLE IF NOT EXISTS tenant (
 );
 
 CREATE TABLE IF NOT EXISTS user_credentials (
-    id varchar(31) NOT NULL CONSTRAINT user_credentials_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT user_credentials_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     activate_token varchar(255) UNIQUE,
     enabled boolean,
     password varchar(255),
     reset_token varchar(255) UNIQUE,
-    user_id varchar(31) UNIQUE
+    user_id uuid UNIQUE
 );
 
 CREATE TABLE IF NOT EXISTS widget_type (
-    id varchar(31) NOT NULL CONSTRAINT widget_type_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT widget_type_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     alias varchar(255),
     bundle_alias varchar(255),
     descriptor varchar(1000000),
     name varchar(255),
-    tenant_id varchar(31)
+    tenant_id uuid
 );
 
 CREATE TABLE IF NOT EXISTS widgets_bundle (
-    id varchar(31) NOT NULL CONSTRAINT widgets_bundle_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT widgets_bundle_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     alias varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     title varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS rule_chain (
-    id varchar(31) NOT NULL CONSTRAINT rule_chain_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT rule_chain_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     configuration varchar(10000000),
     name varchar(255),
-    first_rule_node_id varchar(31),
+    first_rule_node_id uuid,
     root boolean,
     debug_mode boolean,
     search_text varchar(255),
-    tenant_id varchar(31)
+    tenant_id uuid
 );
 
 CREATE TABLE IF NOT EXISTS rule_node (
-    id varchar(31) NOT NULL CONSTRAINT rule_node_pkey PRIMARY KEY,
-    rule_chain_id varchar(31),
+    id uuid NOT NULL CONSTRAINT rule_node_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
+    rule_chain_id uuid,
     additional_info varchar,
     configuration varchar(10000000),
     type varchar(255),
@@ -239,11 +256,12 @@ CREATE TABLE IF NOT EXISTS rule_node (
 );
 
 CREATE TABLE IF NOT EXISTS entity_view (
-    id varchar(31) NOT NULL CONSTRAINT entity_view_pkey PRIMARY KEY,
-    entity_id varchar(31),
+    id uuid NOT NULL CONSTRAINT entity_view_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
+    entity_id uuid,
     entity_type varchar(255),
-    tenant_id varchar(31),
-    customer_id varchar(31),
+    tenant_id uuid,
+    customer_id uuid,
     type varchar(255),
     name varchar(255),
     keys varchar(10000000),

@@ -16,48 +16,52 @@
 
 
 CREATE TABLE IF NOT EXISTS admin_settings (
-    id varchar(31) NOT NULL CONSTRAINT admin_settings_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT admin_settings_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     json_value varchar,
     key varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS alarm (
-    id varchar(31) NOT NULL CONSTRAINT alarm_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT alarm_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     ack_ts bigint,
     clear_ts bigint,
     additional_info varchar,
     end_ts bigint,
-    originator_id varchar(31),
+    originator_id uuid,
     originator_type integer,
     propagate boolean,
     severity varchar(255),
     start_ts bigint,
     status varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     propagate_relation_types varchar,
     type varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS asset (
-    id varchar(31) NOT NULL CONSTRAINT asset_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT asset_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
-    customer_id varchar(31),
+    customer_id uuid,
     name varchar(255),
     label varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     type varchar(255),
     CONSTRAINT asset_name_unq_key UNIQUE (tenant_id, name)
 );
 
 CREATE TABLE IF NOT EXISTS audit_log (
-    id varchar(31) NOT NULL CONSTRAINT audit_log_pkey PRIMARY KEY,
-    tenant_id varchar(31),
-    customer_id varchar(31),
-    entity_id varchar(31),
+    id uuid NOT NULL CONSTRAINT audit_log_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
+    tenant_id uuid,
+    customer_id uuid,
+    entity_id uuid,
     entity_type varchar(255),
     entity_name varchar(255),
-    user_id varchar(31),
+    user_id uuid,
     user_name varchar(255),
     action_type varchar(255),
     action_data varchar(1000000),
@@ -67,7 +71,7 @@ CREATE TABLE IF NOT EXISTS audit_log (
 
 CREATE TABLE IF NOT EXISTS attribute_kv (
   entity_type varchar(255),
-  entity_id varchar(31),
+  entity_id uuid,
   attribute_type varchar(255),
   attribute_key varchar(255),
   bool_v boolean,
@@ -80,7 +84,8 @@ CREATE TABLE IF NOT EXISTS attribute_kv (
 );
 
 CREATE TABLE IF NOT EXISTS component_descriptor (
-    id varchar(31) NOT NULL CONSTRAINT component_descriptor_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT component_descriptor_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     actions varchar(255),
     clazz varchar UNIQUE,
     configuration_descriptor varchar,
@@ -91,7 +96,8 @@ CREATE TABLE IF NOT EXISTS component_descriptor (
 );
 
 CREATE TABLE IF NOT EXISTS customer (
-    id varchar(31) NOT NULL CONSTRAINT customer_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT customer_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     address varchar,
     address2 varchar,
@@ -101,78 +107,90 @@ CREATE TABLE IF NOT EXISTS customer (
     phone varchar(255),
     search_text varchar(255),
     state varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     title varchar(255),
     zip varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS dashboard (
-    id varchar(31) NOT NULL CONSTRAINT dashboard_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT dashboard_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     configuration varchar(10000000),
     assigned_customers varchar(1000000),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     title varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS device (
-    id varchar(31) NOT NULL CONSTRAINT device_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT device_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
-    customer_id varchar(31),
+    customer_id uuid,
     type varchar(255),
     name varchar(255),
     label varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     CONSTRAINT device_name_unq_key UNIQUE (tenant_id, name)
 );
 
 CREATE TABLE IF NOT EXISTS device_credentials (
-    id varchar(31) NOT NULL CONSTRAINT device_credentials_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT device_credentials_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     credentials_id varchar,
     credentials_type varchar(255),
     credentials_value varchar,
-    device_id varchar(31),
+    device_id uuid,
     CONSTRAINT device_credentials_id_unq_key UNIQUE (credentials_id)
 );
 
 CREATE TABLE IF NOT EXISTS event (
-    id varchar(31) NOT NULL CONSTRAINT event_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT event_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     body varchar(10000000),
-    entity_id varchar(31),
+    entity_id uuid,
     entity_type varchar(255),
     event_type varchar(255),
     event_uid varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     ts bigint NOT NULL,
     CONSTRAINT event_unq_key UNIQUE (tenant_id, entity_type, entity_id, event_type, event_uid)
 );
 
 CREATE TABLE IF NOT EXISTS relation (
-    from_id varchar(31),
+    from_id uuid,
     from_type varchar(255),
-    to_id varchar(31),
+    to_id uuid,
     to_type varchar(255),
     relation_type_group varchar(255),
     relation_type varchar(255),
     additional_info varchar,
     CONSTRAINT relation_pkey PRIMARY KEY (from_id, from_type, relation_type_group, relation_type, to_id, to_type)
-);
+) PARTITION BY LIST (relation_type_group);
+
+CREATE TABLE other_relations PARTITION OF relation DEFAULT;
+CREATE TABLE common_relations PARTITION OF relation FOR VALUES IN ('COMMON');
+CREATE TABLE alarm_relations PARTITION OF relation FOR VALUES IN ('ALARM');
+CREATE TABLE dashboard_relations PARTITION OF relation FOR VALUES IN ('DASHBOARD');
+CREATE TABLE rule_relations PARTITION OF relation FOR VALUES IN ('RULE_CHAIN', 'RULE_NODE');
 
 CREATE TABLE IF NOT EXISTS tb_user (
-    id varchar(31) NOT NULL CONSTRAINT tb_user_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT tb_user_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     authority varchar(255),
-    customer_id varchar(31),
+    customer_id uuid,
     email varchar(255) UNIQUE,
     first_name varchar(255),
     last_name varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31)
+    tenant_id uuid
 );
 
 CREATE TABLE IF NOT EXISTS tenant (
-    id varchar(31) NOT NULL CONSTRAINT tenant_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT tenant_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     address varchar,
     address2 varchar,
@@ -190,46 +208,51 @@ CREATE TABLE IF NOT EXISTS tenant (
 );
 
 CREATE TABLE IF NOT EXISTS user_credentials (
-    id varchar(31) NOT NULL CONSTRAINT user_credentials_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT user_credentials_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     activate_token varchar(255) UNIQUE,
     enabled boolean,
     password varchar(255),
     reset_token varchar(255) UNIQUE,
-    user_id varchar(31) UNIQUE
+    user_id uuid UNIQUE
 );
 
 CREATE TABLE IF NOT EXISTS widget_type (
-    id varchar(31) NOT NULL CONSTRAINT widget_type_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT widget_type_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     alias varchar(255),
     bundle_alias varchar(255),
     descriptor varchar(1000000),
     name varchar(255),
-    tenant_id varchar(31)
+    tenant_id uuid
 );
 
 CREATE TABLE IF NOT EXISTS widgets_bundle (
-    id varchar(31) NOT NULL CONSTRAINT widgets_bundle_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT widgets_bundle_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     alias varchar(255),
     search_text varchar(255),
-    tenant_id varchar(31),
+    tenant_id uuid,
     title varchar(255)
 );
 
 CREATE TABLE IF NOT EXISTS rule_chain (
-    id varchar(31) NOT NULL CONSTRAINT rule_chain_pkey PRIMARY KEY,
+    id uuid NOT NULL CONSTRAINT rule_chain_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
     additional_info varchar,
     configuration varchar(10000000),
     name varchar(255),
-    first_rule_node_id varchar(31),
+    first_rule_node_id uuid,
     root boolean,
     debug_mode boolean,
     search_text varchar(255),
-    tenant_id varchar(31)
+    tenant_id uuid
 );
 
 CREATE TABLE IF NOT EXISTS rule_node (
-    id varchar(31) NOT NULL CONSTRAINT rule_node_pkey PRIMARY KEY,
-    rule_chain_id varchar(31),
+    id uuid NOT NULL CONSTRAINT rule_node_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
+    rule_chain_id uuid,
     additional_info varchar,
     configuration varchar(10000000),
     type varchar(255),
@@ -239,11 +262,12 @@ CREATE TABLE IF NOT EXISTS rule_node (
 );
 
 CREATE TABLE IF NOT EXISTS entity_view (
-    id varchar(31) NOT NULL CONSTRAINT entity_view_pkey PRIMARY KEY,
-    entity_id varchar(31),
+    id uuid NOT NULL CONSTRAINT entity_view_pkey PRIMARY KEY,
+    created_time bigint NOT NULL,
+    entity_id uuid,
     entity_type varchar(255),
-    tenant_id varchar(31),
-    customer_id varchar(31),
+    tenant_id uuid,
+    customer_id uuid,
     type varchar(255),
     name varchar(255),
     keys varchar(10000000),

@@ -62,37 +62,37 @@ BEGIN
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_device_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_device_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                             OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(device.id) as entity_id FROM device WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT device.id as entity_id FROM device WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_asset_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_asset_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                            OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(asset.id) as entity_id FROM asset WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT asset.id as entity_id FROM asset WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_customer_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_customer_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                               OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(customer.id) as entity_id FROM customer WHERE tenant_id = %L and id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT customer.id as entity_id FROM customer WHERE tenant_id = %L and id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid varchar(31),
+CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid uuid,
                                                       IN system_ttl bigint, INOUT deleted bigint)
     LANGUAGE plpgsql AS
 $$

@@ -45,3 +45,8 @@ CREATE TABLE IF NOT EXISTS ts_kv_dictionary (
     key_id int GENERATED BY DEFAULT AS IDENTITY(start with 0 increment by 1) UNIQUE,
     CONSTRAINT ts_key_id_pkey PRIMARY KEY (key)
 );
+
+CREATE FUNCTION to_uuid(IN entity_id varchar)
+  RETURNS UUID
+  RETURN UUID(substring(entity_id, 8, 8) || '-' || substring(entity_id, 4, 4) || '-1' || substring(entity_id, 1, 3) ||
+               '-' || substring(entity_id, 16, 4) || '-' || substring(entity_id, 20, 12));

@@ -171,37 +171,37 @@ BEGIN
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_device_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_device_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                             OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(device.id) as entity_id FROM device WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT device.id as entity_id FROM device WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_asset_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_asset_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                            OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(asset.id) as entity_id FROM asset WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT asset.id as entity_id FROM asset WHERE tenant_id = %L and customer_id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE FUNCTION delete_customer_records_from_ts_kv(tenant_id varchar, customer_id varchar, ttl bigint,
+CREATE OR REPLACE FUNCTION delete_customer_records_from_ts_kv(tenant_id uuid, customer_id uuid, ttl bigint,
                                                               OUT deleted bigint) AS
 $$
 BEGIN
     EXECUTE format(
-            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT to_uuid(customer.id) as entity_id FROM customer WHERE tenant_id = %L and id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
+            'WITH deleted AS (DELETE FROM ts_kv WHERE entity_id IN (SELECT customer.id as entity_id FROM customer WHERE tenant_id = %L and id = %L) AND ts < %L::bigint RETURNING *) SELECT count(*) FROM deleted',
             tenant_id, customer_id, ttl) into deleted;
 END;
 $$ LANGUAGE plpgsql;
 
-CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid varchar(31),
+CREATE OR REPLACE PROCEDURE cleanup_timeseries_by_ttl(IN null_uuid uuid,
                                                       IN system_ttl bigint, INOUT deleted bigint)
     LANGUAGE plpgsql AS
 $$

@@ -24,20 +24,26 @@ import java.util.Arrays;
 
 @RunWith(ClasspathSuite.class)
 @ClassnameFilters({
-        "org.thingsboard.server.dao.service.*ServiceSqlTest"
+        "org.thingsboard.server.dao.service.sql.*SqlTest"
 })
 public class SqlDaoServiceTestSuite {
 
     @ClassRule
     public static CustomSqlUnit sqlUnit = new CustomSqlUnit(
-            Arrays.asList("sql/schema-ts-hsql.sql", "sql/schema-entities-hsql.sql", "sql/schema-entities-idx.sql", "sql/system-data.sql", "sql/system-test.sql"),
+            Arrays.asList("sql/schema-ts-hsql.sql", "sql/schema-entities-hsql.sql", "sql/schema-entities-idx.sql"
+                    , "sql/system-data.sql"
+                    , "sql/system-test.sql"
+            ),
             "sql/hsql/drop-all-tables.sql",
             "sql-test.properties"
     );
 
 //    @ClassRule
 //    public static CustomSqlUnit sqlUnit = new CustomSqlUnit(
-//            Arrays.asList("sql/schema-ts-psql.sql", "sql/schema-entities.sql", "sql/schema-entities-idx.sql", "sql/system-data.sql", "sql/system-test.sql"),
+//            Arrays.asList("sql/schema-ts-psql.sql"
+//                    , "sql/schema-entities.sql", "sql/schema-entities-idx.sql"
+//                    , "sql/system-data.sql", "sql/system-test.sql"
+//            ),
 //            "sql/psql/drop-all-tables.sql",
 //            "sql-test.properties"
 //    );

@@ -20,6 +20,7 @@ import com.google.common.util.concurrent.ListenableFuture;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.thingsboard.server.common.data.DataConstants;
@@ -299,6 +300,7 @@ public abstract class BaseEntityServiceTest extends AbstractServiceTest {
             loadedEntities.addAll(data.getData());
         }
         Assert.assertEquals(25, loadedEntities.size());
+        loadedEntities.forEach(entity -> Assert.assertTrue(devices.stream().map(Device::getId).collect(Collectors.toSet()).contains(entity.getEntityId())));
         List<String> loadedTemperatures = loadedEntities.stream().map(entityData ->
                 entityData.getLatest().get(EntityKeyType.ATTRIBUTE).get("temperature").getValue()).collect(Collectors.toList());
         List<String> deviceTemperatures = temperatures.stream().map(aLong -> Long.toString(aLong)).collect(Collectors.toList());

@@ -3,7 +3,7 @@ database.ts.type=sql
 sql.ts_inserts_executor_type=fixed
 sql.ts_inserts_fixed_thread_pool_size=200
 sql.ts_key_value_partitioning=MONTHS
-
+#
 spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
 spring.jpa.properties.hibernate.order_by.default_null_ordering=last
 spring.jpa.show-sql=false

@@ -20,3 +20,4 @@ DROP TABLE IF EXISTS widgets_bundle;
 DROP TABLE IF EXISTS rule_node;
 DROP TABLE IF EXISTS rule_chain;
 DROP TABLE IF EXISTS entity_view;
+DROP FUNCTION IF EXISTS to_uuid;

@@ -17,22 +17,22 @@
 /** SYSTEM **/
 
 /** System admin **/
-INSERT INTO tb_user ( id, tenant_id, customer_id, email, search_text, authority )
-VALUES ( '1e746125a797660a91992ebcb67fe33', '1b21dd2138140008080808080808080', '1b21dd2138140008080808080808080', 'sysadmin@thingsboard.org',
+INSERT INTO tb_user ( id, created_time, tenant_id, customer_id, email, search_text, authority )
+VALUES ( '5a797660-4612-11e7-a919-92ebcb67fe33', 1592576748000, '13814000-1dd2-11b2-8080-808080808080', '13814000-1dd2-11b2-8080-808080808080', 'sysadmin@thingsboard.org',
          'sysadmin@thingsboard.org', 'SYS_ADMIN' );
 
-INSERT INTO user_credentials ( id, user_id, enabled, password )
-VALUES ( '1e7461261441950a91992ebcb67fe33', '1e746125a797660a91992ebcb67fe33', true,
+INSERT INTO user_credentials ( id, created_time, user_id, enabled, password )
+VALUES ( '61441950-4612-11e7-a919-92ebcb67fe33', 1592576748000, '5a797660-4612-11e7-a919-92ebcb67fe33', true,
          '$2a$10$5JTB8/hxWc9WAy62nCGSxeefl3KWmipA9nFpVdDa0/xfIseeBB4Bu' );
 
 /** System settings **/
-INSERT INTO admin_settings ( id, key, json_value )
-VALUES ( '1e746126a2266e4a91992ebcb67fe33', 'general', '{
+INSERT INTO admin_settings ( id, created_time, key, json_value )
+VALUES ( '6a2266e4-4612-11e7-a919-92ebcb67fe33', 1592576748000, 'general', '{
 	"baseUrl": "http://localhost:8080"
 }' );
 
-INSERT INTO admin_settings ( id, key, json_value )
-VALUES ( '1e746126eaaefa6a91992ebcb67fe33', 'mail', '{
+INSERT INTO admin_settings ( id, created_time, key, json_value )
+VALUES ( '6eaaefa6-4612-11e7-a919-92ebcb67fe33', 1592576748000, 'mail', '{
 	"mailFrom": "Thingsboard <sysadmin@localhost.localdomain>",
 	"smtpProtocol": "smtp",
 	"smtpHost": "localhost",