mirror of
https://github.com/timescale/timescaledb.git
synced 2025-05-21 13:14:19 +08:00
d87a6ee5a0
This allows creating hypertables as follows:
```
CREATE TABLE only_1dim(time timestamp, temp float);
SELECT create_hypertable('only_1dim', 'time');
INSERT INTO only_1dim VALUES('2017-01-12T08:11:03', 23.4);
```
It is implemented by making the specification of a partitioning column
optional, and when NULL the number of partitions will be set to 1.
112 lines
3.1 KiB
PL/PgSQL
112 lines
3.1 KiB
PL/PgSQL
|
|
-- Sets a database and hostname as a meta node.
|
|
CREATE OR REPLACE FUNCTION set_meta(
|
|
database_name NAME,
|
|
hostname TEXT
|
|
)
|
|
RETURNS VOID LANGUAGE PLPGSQL VOLATILE AS
|
|
$BODY$
|
|
DECLARE
|
|
meta_row _iobeamdb_catalog.meta;
|
|
BEGIN
|
|
SELECT *
|
|
INTO meta_row
|
|
FROM _iobeamdb_catalog.meta
|
|
LIMIT 1;
|
|
|
|
IF meta_row IS NULL THEN
|
|
INSERT INTO _iobeamdb_catalog.meta (database_name, hostname, server_name)
|
|
VALUES (database_name, hostname, database_name);
|
|
ELSE
|
|
IF meta_row.database_name <> database_name OR meta_row.hostname <> hostname THEN
|
|
RAISE EXCEPTION 'Changing meta info is not supported'
|
|
USING ERRCODE = 'IO101';
|
|
END IF;
|
|
END IF;
|
|
END
|
|
$BODY$;
|
|
|
|
-- Adds a new node to the cluster, with its database name and hostname.
|
|
CREATE OR REPLACE FUNCTION add_node(
|
|
database_name NAME,
|
|
hostname TEXT
|
|
)
|
|
RETURNS VOID LANGUAGE PLPGSQL VOLATILE AS
|
|
$BODY$
|
|
DECLARE
|
|
schema_name NAME;
|
|
BEGIN
|
|
schema_name := format('remote_%s', database_name);
|
|
IF database_name = current_database() THEN
|
|
schema_name = 'public';
|
|
END IF;
|
|
|
|
BEGIN
|
|
INSERT INTO _iobeamdb_catalog.node (database_name, schema_name, server_name, hostname)
|
|
VALUES (database_name, schema_name, database_name, hostname);
|
|
EXCEPTION
|
|
WHEN SQLSTATE '42710' THEN
|
|
RAISE EXCEPTION 'Node % already exists', database_name
|
|
USING ERRCODE = 'IO120';
|
|
END;
|
|
|
|
END
|
|
$BODY$;
|
|
|
|
-- Adds new user credentials for the cluster.
|
|
CREATE OR REPLACE FUNCTION add_cluster_user(
|
|
username TEXT,
|
|
password TEXT
|
|
)
|
|
RETURNS VOID LANGUAGE PLPGSQL VOLATILE AS
|
|
$BODY$
|
|
DECLARE
|
|
BEGIN
|
|
INSERT INTO _iobeamdb_catalog.cluster_user (username, password)
|
|
VALUES (username, password);
|
|
EXCEPTION
|
|
WHEN unique_violation THEN
|
|
RAISE EXCEPTION 'User % already exists', username
|
|
USING ERRCODE = 'IO130';
|
|
END
|
|
$BODY$;
|
|
|
|
CREATE OR REPLACE FUNCTION add_partition_epoch(
|
|
hypertable_id INTEGER,
|
|
keyspace_start SMALLINT [],
|
|
partitioning_column NAME,
|
|
partitioning_func TEXT
|
|
)
|
|
RETURNS VOID LANGUAGE SQL VOLATILE AS
|
|
$BODY$
|
|
WITH epoch AS (
|
|
INSERT INTO _iobeamdb_catalog.partition_epoch (hypertable_id, start_time, end_time, partitioning_func, partitioning_mod, partitioning_column)
|
|
VALUES (hypertable_id, NULL, NULL, partitioning_func, 32768, partitioning_column)
|
|
RETURNING id
|
|
)
|
|
INSERT INTO _iobeamdb_catalog.partition (epoch_id, keyspace_start, keyspace_end)
|
|
SELECT
|
|
epoch.id,
|
|
lag(start, 1, 0)
|
|
OVER (),
|
|
start - 1
|
|
FROM unnest(keyspace_start :: INT [] || (32768) :: INT) start, epoch
|
|
$BODY$;
|
|
|
|
CREATE OR REPLACE FUNCTION add_equi_partition_epoch(
|
|
hypertable_id INTEGER,
|
|
number_partitions SMALLINT,
|
|
partitioning_column NAME,
|
|
partitioning_func TEXT
|
|
)
|
|
RETURNS VOID LANGUAGE SQL VOLATILE AS
|
|
$BODY$
|
|
SELECT add_partition_epoch(
|
|
hypertable_id,
|
|
(SELECT ARRAY(SELECT start * 32768 / (number_partitions)
|
|
FROM generate_series(1, number_partitions - 1) AS start) :: SMALLINT []),
|
|
partitioning_column,
|
|
partitioning_func
|
|
)
|
|
$BODY$;
|