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The `postgres` database might not exists on a data node, but `template1` will always exist so if a connection using `postgres` fails, we use `template1` as a secondary database. This is similar to how `connectMaintenanceDatabase` in the PostgreSQL code base works.
206 lines
10 KiB
SQL
206 lines
10 KiB
SQL
-- This file and its contents are licensed under the Apache License 2.0.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-APACHE for a copy of the license.
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-- This file defines DDL functions for adding and manipulating hypertables.
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-- Converts a regular postgres table to a hypertable.
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--
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-- main_table - The OID of the table to be converted
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-- time_column_name - Name of the column that contains time for a given record
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-- partitioning_column - Name of the column to partition data by
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-- number_partitions - (Optional) Number of partitions for data
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-- associated_schema_name - (Optional) Schema for internal hypertable tables
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-- associated_table_prefix - (Optional) Prefix for internal hypertable table names
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-- chunk_time_interval - (Optional) Initial time interval for a chunk
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-- create_default_indexes - (Optional) Whether or not to create the default indexes
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-- if_not_exists - (Optional) Do not fail if table is already a hypertable
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-- partitioning_func - (Optional) The partitioning function to use for spatial partitioning
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-- migrate_data - (Optional) Set to true to migrate any existing data in the table to chunks
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-- chunk_target_size - (Optional) The target size for chunks (e.g., '1000MB', 'estimate', or 'off')
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-- chunk_sizing_func - (Optional) A function to calculate the chunk time interval for new chunks
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-- time_partitioning_func - (Optional) The partitioning function to use for "time" partitioning
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-- replication_factor - (Optional) A value of 1 or greater makes this hypertable distributed
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-- data_nodes - (Optional) The specific data nodes to distribute this hypertable across
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CREATE OR REPLACE FUNCTION create_hypertable(
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main_table REGCLASS,
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time_column_name NAME,
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partitioning_column NAME = NULL,
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number_partitions INTEGER = NULL,
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associated_schema_name NAME = NULL,
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associated_table_prefix NAME = NULL,
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chunk_time_interval ANYELEMENT = NULL::bigint,
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create_default_indexes BOOLEAN = TRUE,
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if_not_exists BOOLEAN = FALSE,
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partitioning_func REGPROC = NULL,
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migrate_data BOOLEAN = FALSE,
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chunk_target_size TEXT = NULL,
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chunk_sizing_func REGPROC = '_timescaledb_internal.calculate_chunk_interval'::regproc,
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time_partitioning_func REGPROC = NULL,
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replication_factor INTEGER = NULL,
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data_nodes NAME[] = NULL
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) RETURNS TABLE(hypertable_id INT, schema_name NAME, table_name NAME, created BOOL) AS '@MODULE_PATHNAME@', 'ts_hypertable_create' LANGUAGE C VOLATILE;
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-- Same functionality as create_hypertable, only must have a replication factor > 0 (defaults to 1)
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CREATE OR REPLACE FUNCTION create_distributed_hypertable(
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main_table REGCLASS,
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time_column_name NAME,
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partitioning_column NAME = NULL,
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number_partitions INTEGER = NULL,
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associated_schema_name NAME = NULL,
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associated_table_prefix NAME = NULL,
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chunk_time_interval ANYELEMENT = NULL::bigint,
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create_default_indexes BOOLEAN = TRUE,
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if_not_exists BOOLEAN = FALSE,
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partitioning_func REGPROC = NULL,
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migrate_data BOOLEAN = FALSE,
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chunk_target_size TEXT = NULL,
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chunk_sizing_func REGPROC = '_timescaledb_internal.calculate_chunk_interval'::regproc,
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time_partitioning_func REGPROC = NULL,
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replication_factor INTEGER = 1,
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data_nodes NAME[] = NULL
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) RETURNS TABLE(hypertable_id INT, schema_name NAME, table_name NAME, created BOOL) AS '@MODULE_PATHNAME@', 'ts_hypertable_distributed_create' LANGUAGE C VOLATILE;
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-- Set adaptive chunking. To disable, set chunk_target_size => 'off'.
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CREATE OR REPLACE FUNCTION set_adaptive_chunking(
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hypertable REGCLASS,
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chunk_target_size TEXT,
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INOUT chunk_sizing_func REGPROC = '_timescaledb_internal.calculate_chunk_interval'::regproc,
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OUT chunk_target_size BIGINT
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) RETURNS RECORD AS '@MODULE_PATHNAME@', 'ts_chunk_adaptive_set' LANGUAGE C VOLATILE;
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-- Update chunk_time_interval for a hypertable.
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--
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-- main_table - The OID of the table corresponding to a hypertable whose time
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-- interval should be updated
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-- chunk_time_interval - The new time interval. For hypertables with integral
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-- time columns, this must be an integral type. For hypertables with a
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-- TIMESTAMP/TIMESTAMPTZ/DATE type, it can be integral which is treated as
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-- microseconds, or an INTERVAL type.
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CREATE OR REPLACE FUNCTION set_chunk_time_interval(
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main_table REGCLASS,
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chunk_time_interval ANYELEMENT,
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dimension_name NAME = NULL
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) RETURNS VOID AS '@MODULE_PATHNAME@', 'ts_dimension_set_interval' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION set_number_partitions(
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main_table REGCLASS,
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number_partitions INTEGER,
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dimension_name NAME = NULL
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) RETURNS VOID AS '@MODULE_PATHNAME@', 'ts_dimension_set_num_slices' LANGUAGE C VOLATILE;
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-- Drop chunks older than the given timestamp. If a hypertable name is given,
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-- drop only chunks associated with this table. Any of the first three arguments
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-- can be NULL meaning "all values".
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CREATE OR REPLACE FUNCTION drop_chunks(
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older_than "any" = NULL,
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table_name NAME = NULL,
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schema_name NAME = NULL,
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cascade BOOLEAN = FALSE,
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newer_than "any" = NULL,
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verbose BOOLEAN = FALSE,
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cascade_to_materializations BOOLEAN = NULL
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) RETURNS SETOF TEXT AS '@MODULE_PATHNAME@', 'ts_chunk_drop_chunks'
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LANGUAGE C VOLATILE PARALLEL UNSAFE;
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-- show chunks older than or newer than a specific time.
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-- `hypertable` argument can be a valid hypertable or NULL.
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-- In the latter case the function will try to list all
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-- the chunks from all of the hypertables in the database.
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-- older_than or newer_than or both can be NULL.
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-- if `hypertable` argument is null but a time constraint is specified
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-- through older_than or newer_than, the call will succeed
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-- if and only if all the hypertables in the database
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-- have the same type as the given time constraint argument
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CREATE OR REPLACE FUNCTION show_chunks(
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hypertable REGCLASS = NULL,
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older_than "any" = NULL,
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newer_than "any" = NULL
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) RETURNS SETOF REGCLASS AS '@MODULE_PATHNAME@', 'ts_chunk_show_chunks'
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LANGUAGE C STABLE PARALLEL SAFE;
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-- Add a dimension (of partitioning) to a hypertable
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--
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-- main_table - OID of the table to add a dimension to
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-- column_name - NAME of the column to use in partitioning for this dimension
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-- number_partitions - Number of partitions, for non-time dimensions
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-- interval_length - Size of intervals for time dimensions (can be integral or INTERVAL)
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-- partitioning_func - Function used to partition the column
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-- if_not_exists - If set, and the dimension already exists, generate a notice instead of an error
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CREATE OR REPLACE FUNCTION add_dimension(
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main_table REGCLASS,
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column_name NAME,
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number_partitions INTEGER = NULL,
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chunk_time_interval ANYELEMENT = NULL::BIGINT,
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partitioning_func REGPROC = NULL,
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if_not_exists BOOLEAN = FALSE
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) RETURNS TABLE(dimension_id INT, schema_name NAME, table_name NAME, column_name NAME, created BOOL)
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AS '@MODULE_PATHNAME@', 'ts_dimension_add' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION attach_tablespace(
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tablespace NAME,
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hypertable REGCLASS,
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if_not_attached BOOLEAN = false
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) RETURNS VOID
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AS '@MODULE_PATHNAME@', 'ts_tablespace_attach' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION detach_tablespace(
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tablespace NAME,
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hypertable REGCLASS = NULL,
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if_attached BOOLEAN = false
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) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_tablespace_detach' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION detach_tablespaces(hypertable REGCLASS) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_tablespace_detach_all_from_hypertable' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION show_tablespaces(hypertable REGCLASS) RETURNS SETOF NAME
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AS '@MODULE_PATHNAME@', 'ts_tablespace_show' LANGUAGE C VOLATILE STRICT;
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-- Add a data node to a TimescaleDB distributed database.
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CREATE OR REPLACE FUNCTION add_data_node(
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node_name NAME,
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host TEXT,
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database NAME = NULL,
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port INTEGER = NULL,
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if_not_exists BOOLEAN = FALSE,
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bootstrap BOOLEAN = TRUE
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) RETURNS TABLE(node_name NAME, host TEXT, port INTEGER, database NAME,
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node_created BOOL, database_created BOOL, extension_created BOOL)
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AS '@MODULE_PATHNAME@', 'ts_data_node_add' LANGUAGE C VOLATILE;
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-- Delete a data node from a distributed database
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CREATE OR REPLACE FUNCTION delete_data_node(
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node_name NAME,
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if_exists BOOLEAN = FALSE,
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force BOOLEAN = FALSE
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) RETURNS BOOLEAN AS '@MODULE_PATHNAME@', 'ts_data_node_delete' LANGUAGE C VOLATILE;
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-- Attach a data node to a distributed hypertable
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CREATE OR REPLACE FUNCTION attach_data_node(
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node_name NAME,
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hypertable REGCLASS,
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if_not_attached BOOLEAN = FALSE,
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repartition BOOLEAN = TRUE
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) RETURNS TABLE(hypertable_id INTEGER, node_hypertable_id INTEGER, node_name NAME)
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AS '@MODULE_PATHNAME@', 'ts_data_node_attach' LANGUAGE C VOLATILE;
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-- Detach a data node from a distributed hypertable. NULL hypertable means it will detach from all distributed hypertables
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CREATE OR REPLACE FUNCTION detach_data_node(node_name NAME, hypertable REGCLASS = NULL, force BOOLEAN = FALSE) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_data_node_detach' LANGUAGE C VOLATILE;
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-- Block new chunk creation on a data node for a distributed hypertable. NULL hypertable means it will block
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-- chunks for all distributed hypertables
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CREATE OR REPLACE FUNCTION block_new_chunks(data_node_name NAME, hypertable REGCLASS = NULL, force BOOLEAN = FALSE) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_data_node_block_new_chunks' LANGUAGE C VOLATILE;
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-- Reallow chunk creations on a blocked data node for a distributed hypertable. NULL hypertable means it will
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-- allow chunks for all distributed hypertables
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CREATE OR REPLACE FUNCTION allow_new_chunks(data_node_name NAME, hypertable REGCLASS = NULL) RETURNS INTEGER
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AS '@MODULE_PATHNAME@', 'ts_data_node_allow_new_chunks' LANGUAGE C VOLATILE;
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-- Execute query on a specified list of data nodes. By default node_list is NULL, which means
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-- to execute the query on every data node
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CREATE OR REPLACE FUNCTION distributed_exec(query TEXT, node_list name[] = NULL) RETURNS VOID
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AS '@MODULE_PATHNAME@', 'ts_distributed_exec' LANGUAGE C VOLATILE;
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