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https://github.com/timescale/timescaledb.git
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1718120fc0
Add optional `force` parameter to the `refresh_continuous_aggregate` procedure that would allow user to partially re-materialize cagg within a time window that has been previously materialized.
219 lines
11 KiB
SQL
219 lines
11 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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-- relation - 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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CREATE OR REPLACE FUNCTION @extschema@.create_hypertable(
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relation 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_functions.calculate_chunk_interval'::regproc,
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time_partitioning_func REGPROC = 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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-- A generalized hypertable creation API that can be used to convert a PostgreSQL table
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-- with TIME/SERIAL/BIGSERIAL columns to a hypertable.
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--
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-- relation - The OID of the table to be converted
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-- dimension - The dimension to use for partitioning
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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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-- migrate_data (Optional) Set to true to migrate any existing data in the table to chunks
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CREATE OR REPLACE FUNCTION @extschema@.create_hypertable(
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relation REGCLASS,
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dimension _timescaledb_internal.dimension_info,
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create_default_indexes BOOLEAN = TRUE,
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if_not_exists BOOLEAN = FALSE,
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migrate_data BOOLEAN = FALSE
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) RETURNS TABLE(hypertable_id INT, created BOOL) AS '@MODULE_PATHNAME@', 'ts_hypertable_create_general' 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 @extschema@.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_functions.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 [DEPRECATED].
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--
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-- hypertable - 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 @extschema@.set_chunk_time_interval(
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hypertable 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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-- Update partition_interval for a hypertable.
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--
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-- hypertable - The OID of the table corresponding to a hypertable whose
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-- partition interval should be updated
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-- partition_interval - The new interval. For hypertables with integral/serial/bigserial
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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 @extschema@.set_partitioning_interval(
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hypertable REGCLASS,
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partition_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 @extschema@.set_number_partitions(
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hypertable 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 for the specific
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-- hypertable or continuous aggregate.
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CREATE OR REPLACE FUNCTION @extschema@.drop_chunks(
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relation REGCLASS,
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older_than "any" = NULL,
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newer_than "any" = NULL,
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verbose BOOLEAN = FALSE,
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created_before "any" = NULL,
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created_after "any" = 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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-- `relation` must be a valid hypertable or continuous aggregate.
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CREATE OR REPLACE FUNCTION @extschema@.show_chunks(
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relation REGCLASS,
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older_than "any" = NULL,
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newer_than "any" = NULL,
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created_before "any" = NULL,
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created_after "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 [DEPRECATED]
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--
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-- hypertable - 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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-- chunk_time_interval - 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 @extschema@.add_dimension(
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hypertable 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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-- Add a dimension (of partitioning) to a hypertable.
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--
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-- hypertable - OID of the table to add a dimension to
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-- dimension - Dimension to add
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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 @extschema@.add_dimension(
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hypertable REGCLASS,
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dimension _timescaledb_internal.dimension_info,
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if_not_exists BOOLEAN = FALSE
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) RETURNS TABLE(dimension_id INT, created BOOL)
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AS '@MODULE_PATHNAME@', 'ts_dimension_add_general' LANGUAGE C VOLATILE;
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-- Enable tracking of statistics on a column of a hypertable.
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--
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-- hypertable - OID of the table to which the column belongs to
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-- column_name - The column to track statistics for
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-- if_not_exists - If set, and the entry already exists, generate a notice instead of an error
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-- Returns the "id" of the entry created. The "enabled" field
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-- is set to true if entry is created or exists already.
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CREATE OR REPLACE FUNCTION @extschema@.enable_chunk_skipping(
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hypertable REGCLASS,
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column_name NAME,
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if_not_exists BOOLEAN = FALSE
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) RETURNS TABLE(column_stats_id INT, enabled BOOL)
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AS '@MODULE_PATHNAME@', 'ts_chunk_column_stats_enable' LANGUAGE C VOLATILE;
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-- Disable tracking of statistics on a column of a hypertable.
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--
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-- hypertable - OID of the table to remove from
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-- column_name - NAME of the column on which the stats are tracked
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-- if_not_exists - If set, and the entry does not exist,
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-- generate a notice instead of an error. The "disabled" field
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-- is set to true if entry is deleted successfully.
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CREATE OR REPLACE FUNCTION @extschema@.disable_chunk_skipping(
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hypertable REGCLASS,
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column_name NAME,
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if_not_exists BOOLEAN = FALSE
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) RETURNS TABLE(hypertable_id INT, column_name NAME, disabled BOOL)
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AS '@MODULE_PATHNAME@', 'ts_chunk_column_stats_disable' LANGUAGE C VOLATILE;
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CREATE OR REPLACE FUNCTION @extschema@.by_hash(column_name NAME, number_partitions INTEGER,
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partition_func regproc = NULL)
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RETURNS _timescaledb_internal.dimension_info LANGUAGE C
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AS '@MODULE_PATHNAME@', 'ts_hash_dimension';
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CREATE OR REPLACE FUNCTION @extschema@.by_range(column_name NAME,
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partition_interval ANYELEMENT = NULL::bigint,
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partition_func regproc = NULL)
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RETURNS _timescaledb_internal.dimension_info LANGUAGE C
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AS '@MODULE_PATHNAME@', 'ts_range_dimension';
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CREATE OR REPLACE FUNCTION @extschema@.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 @extschema@.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 @extschema@.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 @extschema@.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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-- Refresh a continuous aggregate across the given window.
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CREATE OR REPLACE PROCEDURE @extschema@.refresh_continuous_aggregate(
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continuous_aggregate REGCLASS,
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window_start "any",
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window_end "any",
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force BOOLEAN = FALSE
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) LANGUAGE C AS '@MODULE_PATHNAME@', 'ts_continuous_agg_refresh';
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