added schema ts latest for migration

+--
+-- 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 TABLE IF NOT EXISTS ts_kv_latest
+(
+    entity_id uuid   NOT NULL,
+    key       int    NOT NULL,
+    ts        bigint NOT NULL,
+    bool_v    boolean,
+    str_v     varchar(10000000),
+    long_v    bigint,
+    dbl_v     double precision,
+    json_v    json,
+    CONSTRAINT ts_kv_latest_pkey PRIMARY KEY (entity_id, key)
+);
+
+CREATE TABLE IF NOT EXISTS ts_kv_dictionary
+(
+    key    varchar(255) NOT NULL,
+    key_id serial UNIQUE,
+    CONSTRAINT ts_key_id_pkey PRIMARY KEY (key)
+);
\ No newline at end of file

@@ -31,8 +31,12 @@ import org.thingsboard.server.dao.sqlts.dictionary.TsKvDictionaryRepository;
 import org.thingsboard.server.dao.sqlts.insert.latest.InsertLatestTsRepository;
 import org.thingsboard.server.dao.util.NoSqlTsDao;
 import org.thingsboard.server.dao.util.SqlTsLatestDao;
-import org.thingsboard.server.service.install.EntityDatabaseSchemaService;
+import org.thingsboard.server.service.install.InstallScripts;
 
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.util.Arrays;
@@ -69,6 +73,9 @@ public class CassandraTsLatestToSqlMigrateService implements TsLatestMigrateServ
     @Autowired
     protected TsKvDictionaryRepository dictionaryRepository;
 
+    @Autowired
+    private InstallScripts installScripts;
+
     @Value("${spring.datasource.url}")
     protected String dbUrl;
 
@@ -86,6 +93,8 @@ public class CassandraTsLatestToSqlMigrateService implements TsLatestMigrateServ
     public void migrate() throws Exception {
         log.info("Performing migration of latest timeseries data from cassandra to SQL database ...");
         try (Connection conn = DriverManager.getConnection(dbUrl, dbUserName, dbPassword)) {
+            Path schemaUpdateFile = Paths.get(installScripts.getDataDir(), "upgrade", "3.0.1", "schema_ts_latest.sql");
+            loadSql(schemaUpdateFile, conn);
             conn.setAutoCommit(false);
             for (CassandraToSqlTable table : tables) {
                 table.migrateToSql(cluster.getSession(), conn);
@@ -215,4 +224,10 @@ public class CassandraTsLatestToSqlMigrateService implements TsLatestMigrateServ
         }
         return keyId;
     }
+
+    private void loadSql(Path sqlFile, Connection conn) throws Exception {
+        String sql = new String(Files.readAllBytes(sqlFile), Charset.forName("UTF-8"));
+        conn.createStatement().execute(sql); //NOSONAR, ignoring because method used to execute thingsboard database upgrade script
+        Thread.sleep(5000);
+    }
 }