schema_update_psql_ts.sql
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--
-- 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.
--
-- call create_partition_ts_kv_table();
CREATE OR REPLACE PROCEDURE create_partition_ts_kv_table() LANGUAGE plpgsql AS $$
BEGIN
ALTER TABLE ts_kv
RENAME TO ts_kv_old;
ALTER TABLE ts_kv_old
RENAME CONSTRAINT ts_kv_pkey TO ts_kv_pkey_old;
CREATE TABLE IF NOT EXISTS ts_kv
(
LIKE ts_kv_old
)
PARTITION BY RANGE (ts);
ALTER TABLE ts_kv
DROP COLUMN entity_type;
ALTER TABLE ts_kv
ALTER COLUMN entity_id TYPE uuid USING entity_id::uuid;
ALTER TABLE ts_kv
ALTER COLUMN key TYPE integer USING key::integer;
ALTER TABLE ts_kv
ADD CONSTRAINT ts_kv_pkey PRIMARY KEY (entity_id, key, ts);
END;
$$;
-- call create_new_ts_kv_latest_table();
CREATE OR REPLACE PROCEDURE create_new_ts_kv_latest_table() LANGUAGE plpgsql AS $$
BEGIN
ALTER TABLE ts_kv_latest
RENAME TO ts_kv_latest_old;
ALTER TABLE ts_kv_latest_old
RENAME CONSTRAINT ts_kv_latest_pkey TO ts_kv_latest_pkey_old;
CREATE TABLE IF NOT EXISTS ts_kv_latest
(
LIKE ts_kv_latest_old
);
ALTER TABLE ts_kv_latest
DROP COLUMN entity_type;
ALTER TABLE ts_kv_latest
ALTER COLUMN entity_id TYPE uuid USING entity_id::uuid;
ALTER TABLE ts_kv_latest
ALTER COLUMN key TYPE integer USING key::integer;
ALTER TABLE ts_kv_latest
ADD CONSTRAINT ts_kv_latest_pkey PRIMARY KEY (entity_id, key);
END;
$$;
CREATE OR REPLACE FUNCTION get_partitions_data(IN partition_type varchar)
RETURNS
TABLE
(
partition_date text,
from_ts bigint,
to_ts bigint
)
AS
$$
BEGIN
CASE
WHEN partition_type = 'DAYS' THEN
RETURN QUERY SELECT day_date.day AS partition_date,
(extract(epoch from (day_date.day)::timestamp) * 1000)::bigint AS from_ts,
(extract(epoch from (day_date.day::date + INTERVAL '1 DAY')::timestamp) *
1000)::bigint AS to_ts
FROM (SELECT DISTINCT TO_CHAR(TO_TIMESTAMP(ts / 1000), 'YYYY_MM_DD') AS day
FROM ts_kv_old) AS day_date;
WHEN partition_type = 'MONTHS' THEN
RETURN QUERY SELECT SUBSTRING(month_date.first_date, 1, 7) AS partition_date,
(extract(epoch from (month_date.first_date)::timestamp) * 1000)::bigint AS from_ts,
(extract(epoch from (month_date.first_date::date + INTERVAL '1 MONTH')::timestamp) *
1000)::bigint AS to_ts
FROM (SELECT DISTINCT TO_CHAR(TO_TIMESTAMP(ts / 1000), 'YYYY_MM_01') AS first_date
FROM ts_kv_old) AS month_date;
WHEN partition_type = 'YEARS' THEN
RETURN QUERY SELECT SUBSTRING(year_date.year, 1, 4) AS partition_date,
(extract(epoch from (year_date.year)::timestamp) * 1000)::bigint AS from_ts,
(extract(epoch from (year_date.year::date + INTERVAL '1 YEAR')::timestamp) *
1000)::bigint AS to_ts
FROM (SELECT DISTINCT TO_CHAR(TO_TIMESTAMP(ts / 1000), 'YYYY_01_01') AS year FROM ts_kv_old) AS year_date;
ELSE
RAISE EXCEPTION 'Failed to parse partitioning property: % !', partition_type;
END CASE;
END;
$$ LANGUAGE plpgsql;
-- call create_partitions();
CREATE OR REPLACE PROCEDURE create_partitions(IN partition_type varchar) LANGUAGE plpgsql AS $$
DECLARE
partition_date varchar;
from_ts bigint;
to_ts bigint;
partitions_cursor CURSOR FOR SELECT * FROM get_partitions_data(partition_type);
BEGIN
OPEN partitions_cursor;
LOOP
FETCH partitions_cursor INTO partition_date, from_ts, to_ts;
EXIT WHEN NOT FOUND;
EXECUTE 'CREATE TABLE IF NOT EXISTS ts_kv_' || partition_date ||
' PARTITION OF ts_kv FOR VALUES FROM (' || from_ts ||
') TO (' || to_ts || ');';
RAISE NOTICE 'A partition % has been created!',CONCAT('ts_kv_', partition_date);
END LOOP;
CLOSE partitions_cursor;
END;
$$;
-- call create_ts_kv_dictionary_table();
CREATE OR REPLACE PROCEDURE create_ts_kv_dictionary_table() LANGUAGE plpgsql AS $$
BEGIN
CREATE TABLE IF NOT EXISTS ts_kv_dictionary
(
key varchar(255) NOT NULL,
key_id serial UNIQUE,
CONSTRAINT ts_key_id_pkey PRIMARY KEY (key)
);
END;
$$;
-- call insert_into_dictionary();
CREATE OR REPLACE PROCEDURE insert_into_dictionary() LANGUAGE plpgsql AS $$
DECLARE
insert_record RECORD;
key_cursor CURSOR FOR SELECT DISTINCT key
FROM ts_kv_old
ORDER BY key;
BEGIN
OPEN key_cursor;
LOOP
FETCH key_cursor INTO insert_record;
EXIT WHEN NOT FOUND;
IF NOT EXISTS(SELECT key FROM ts_kv_dictionary WHERE key = insert_record.key) THEN
INSERT INTO ts_kv_dictionary(key) VALUES (insert_record.key);
RAISE NOTICE 'Key: % has been inserted into the dictionary!',insert_record.key;
ELSE
RAISE NOTICE 'Key: % already exists in the dictionary!',insert_record.key;
END IF;
END LOOP;
CLOSE key_cursor;
END;
$$;
CREATE OR REPLACE FUNCTION to_uuid(IN entity_id varchar, OUT uuid_id uuid) AS
$$
BEGIN
uuid_id := substring(entity_id, 8, 8) || '-' || substring(entity_id, 4, 4) || '-1' || substring(entity_id, 1, 3) ||
'-' || substring(entity_id, 16, 4) || '-' || substring(entity_id, 20, 12);
END;
$$ LANGUAGE plpgsql;
CREATE OR REPLACE PROCEDURE insert_into_ts_kv(IN path_to_file varchar) LANGUAGE plpgsql AS $$
BEGIN
EXECUTE format ('COPY (SELECT to_uuid(entity_id) AS entity_id,
ts_kv_records.key AS key,
ts_kv_records.ts AS ts,
ts_kv_records.bool_v AS bool_v,
ts_kv_records.str_v AS str_v,
ts_kv_records.long_v AS long_v,
ts_kv_records.dbl_v AS dbl_v
FROM (SELECT entity_id AS entity_id,
key_id AS key,
ts,
bool_v,
str_v,
long_v,
dbl_v
FROM ts_kv_old
INNER JOIN ts_kv_dictionary ON (ts_kv_old.key = ts_kv_dictionary.key)) AS ts_kv_records) TO %L;', path_to_file);
EXECUTE format ('COPY ts_kv FROM %L', path_to_file);
END
$$;
-- call insert_into_ts_kv_latest();
CREATE OR REPLACE PROCEDURE insert_into_ts_kv_latest(IN path_to_file varchar) LANGUAGE plpgsql AS $$
BEGIN
EXECUTE format ('COPY (SELECT to_uuid(entity_id) AS entity_id,
ts_kv_latest_records.key AS key,
ts_kv_latest_records.ts AS ts,
ts_kv_latest_records.bool_v AS bool_v,
ts_kv_latest_records.str_v AS str_v,
ts_kv_latest_records.long_v AS long_v,
ts_kv_latest_records.dbl_v AS dbl_v
FROM (SELECT entity_id AS entity_id,
key_id AS key,
ts,
bool_v,
str_v,
long_v,
dbl_v
FROM ts_kv_latest_old
INNER JOIN ts_kv_dictionary ON (ts_kv_latest_old.key = ts_kv_dictionary.key)) AS ts_kv_latest_records) TO %L;', path_to_file);
EXECUTE format ('COPY ts_kv_latest FROM %L', path_to_file);
END;
$$;