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-- Fixed custom time intervals to work properly with native partitioning. (Github Issue #200)
-- Fixed template table owner to be the same as the partitioned table owner when the template table is not manually set. Note this will not change any existing template table ownerships, it only affects newly created native partitions sets. (Github Issue #203)
CREATE OR REPLACE FUNCTION create_parent(
p_parent_table text
, p_control text
, p_type text
, p_interval text
, p_constraint_cols text[] DEFAULT NULL
, p_premake int DEFAULT 4
, p_automatic_maintenance text DEFAULT 'on'
, p_start_partition text DEFAULT NULL
, p_inherit_fk boolean DEFAULT true
, p_epoch text DEFAULT 'none'
, p_upsert text DEFAULT ''
, p_trigger_return_null boolean DEFAULT true
, p_template_table text DEFAULT NULL
, p_jobmon boolean DEFAULT true
, p_debug boolean DEFAULT false)
RETURNS boolean
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_partattrs smallint[];
v_base_timestamp timestamptz;
v_count int := 1;
v_control_type text;
v_control_exact_type text;
v_datetime_string text;
v_higher_control_type text;
v_higher_parent_control text;
v_higher_parent_schema text := split_part(p_parent_table, '.', 1);
v_higher_parent_table text := split_part(p_parent_table, '.', 2);
v_id_interval bigint;
v_job_id bigint;
v_jobmon_schema text;
v_last_partition_created boolean;
v_max bigint;
v_native_sub_control text;
v_notnull boolean;
v_new_search_path text := '@extschema@,pg_temp';
v_old_search_path text;
v_parent_owner text;
v_parent_partition_id bigint;
v_parent_partition_timestamp timestamptz;
v_parent_schema text;
v_parent_tablename text;
v_part_col text;
v_part_type text;
v_partition_time timestamptz;
v_partition_time_array timestamptz[];
v_partition_id_array bigint[];
v_partstrat char;
v_row record;
v_sql text;
v_start_time timestamptz;
v_starting_partition_id bigint;
v_step_id bigint;
v_step_overflow_id bigint;
v_sub_parent text;
v_success boolean := false;
v_template_schema text;
v_template_tablename text;
v_time_interval interval;
v_top_datetime_string text;
v_top_parent_schema text := split_part(p_parent_table, '.', 1);
v_top_parent_table text := split_part(p_parent_table, '.', 2);
BEGIN
/*
* Function to turn a table into the parent of a partition set
*/
IF position('.' in p_parent_table) = 0 THEN
RAISE EXCEPTION 'Parent table must be schema qualified';
END IF;
IF p_upsert <> '' THEN
IF current_setting('server_version_num')::int < 90500 THEN
RAISE EXCEPTION 'INSERT ... ON CONFLICT (UPSERT) feature is only supported in PostgreSQL 9.5 and later';
END IF;
IF p_type = 'native' THEN
RAISE EXCEPTION 'Native partitioning does not currently support upsert. Use pg_partman''s partitioning methods instead if this is required';
END IF;
END IF;
SELECT n.nspname, c.relname INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;
IF v_parent_tablename IS NULL THEN
RAISE EXCEPTION 'Unable to find given parent table in system catalogs. Please create parent table first: %', p_parent_table;
END IF;
SELECT attnotnull INTO v_notnull
FROM pg_catalog.pg_attribute a
JOIN pg_catalog.pg_class c ON a.attrelid = c.oid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name
AND a.attname = p_control::name;
IF p_type <> 'native' AND (v_notnull = false OR v_notnull IS NULL) THEN
RAISE EXCEPTION 'Control column given (%) for parent table (%) does not exist or must be set to NOT NULL', p_control, p_parent_table;
END IF;
SELECT general_type, exact_type INTO v_control_type, v_control_exact_type
FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, p_control);
IF (p_epoch <> 'none' AND v_control_type <> 'id') THEN
RAISE EXCEPTION 'p_epoch can only be used with an integer based control column and does not work for native partitioning';
END IF;
IF NOT @extschema@.check_partition_type(p_type) THEN
RAISE EXCEPTION '% is not a valid partitioning type for pg_partman', p_type;
END IF;
IF p_type = 'native' THEN
IF current_setting('server_version_num')::int < 100000 THEN
RAISE EXCEPTION 'Native partitioning only available in PostgreSQL versions 10.0+';
END IF;
-- Check if given parent table has been already set up as a partitioned table and is ranged
SELECT p.partstrat, partattrs INTO v_partstrat, v_partattrs
FROM pg_catalog.pg_partitioned_table p
JOIN pg_catalog.pg_class c ON p.partrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = v_parent_schema::name
AND c.relname = v_parent_tablename::name;
IF v_partstrat <> 'r' OR v_partstrat IS NULL THEN
RAISE EXCEPTION 'When using native partitioning, you must have created the given parent table as ranged (not list) partitioned already. Ex: CREATE TABLE ... PARITIONED BY RANGE ...)';
END IF;
IF array_length(v_partattrs, 1) > 1 THEN
RAISE NOTICE 'pg_partman only supports single column native partitioning at this time. Found % columns in given parent definition.', array_length(v_partattrs, 1);
END IF;
SELECT a.attname, t.typname
INTO v_part_col, v_part_type
FROM pg_attribute a
JOIN pg_class c ON a.attrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
JOIN pg_type t ON a.atttypid = t.oid
WHERE n.nspname = v_parent_schema::name
AND c.relname = v_parent_tablename::name
AND attnum IN (SELECT unnest(partattrs) FROM pg_partitioned_table p WHERE a.attrelid = p.partrelid);
IF p_control <> v_part_col OR v_control_exact_type <> v_part_type THEN
RAISE EXCEPTION 'Control column and type given in arguments (%, %) does not match the control column and type of the given native partition set (%, %)', p_control, v_control_exact_type, v_part_col, v_part_type;
END IF;
-- Check that control column is a usable type for pg_partman.
IF v_control_type NOT IN ('time', 'id') THEN
RAISE EXCEPTION 'Only date/time or integer types are allowed for the control column with native partitioning.';
END IF;
-- Table to handle properties not natively inherited yet (indexes, fks, etc)
IF p_template_table IS NULL THEN
v_template_schema := '@extschema@';
v_template_tablename := @extschema@.check_name_length('template_'||v_parent_schema||'_'||v_parent_tablename);
EXECUTE format('CREATE TABLE IF NOT EXISTS %I.%I (LIKE %I.%I)', '@extschema@', v_template_tablename, v_parent_schema, v_parent_tablename);
SELECT pg_get_userbyid(c.relowner) INTO v_parent_owner
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = v_parent_schema::name
AND c.relname = v_parent_tablename::name;
EXECUTE format('ALTER TABLE %I.%I OWNER TO %I'
, '@extschema@'
, v_template_tablename
, v_parent_owner);
ELSE
SELECT n.nspname, c.relname INTO v_template_schema, v_template_tablename
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_template_table, '.', 1)::name
AND c.relname = split_part(p_template_table, '.', 2)::name;
IF v_template_tablename IS NULL THEN
RAISE EXCEPTION 'Unable to find given template table in system catalogs (%). Please create template table first or leave parameter NULL to have a default one created for you.', p_parent_table;
END IF;
END IF;
ELSE
IF current_setting('server_version_num')::int >= 100000 THEN
SELECT p.partstrat INTO v_partstrat
FROM pg_catalog.pg_partitioned_table p
JOIN pg_catalog.pg_class c ON p.partrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = v_parent_schema::name
AND c.relname = v_parent_tablename::name;
END IF;
IF v_partstrat IS NOT NULL THEN
RAISE EXCEPTION 'Given parent table has been set up with native partitioning therefore cannot be used with pg_partman''s other partitioning types. Either recreate table non-native or set the type argument to ''native''';
END IF;
END IF;
SELECT current_setting('search_path') INTO v_old_search_path;
IF p_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');
EXECUTE format('LOCK TABLE %I.%I IN ACCESS EXCLUSIVE MODE', v_parent_schema, v_parent_tablename);
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job(format('PARTMAN SETUP PARENT: %s', p_parent_table));
v_step_id := add_step(v_job_id, format('Creating initial partitions on new parent table: %s', p_parent_table));
END IF;
-- If this parent table has siblings that are also partitioned (subpartitions), ensure this parent gets added to part_config_sub table so future maintenance will subpartition it
-- Just doing in a loop to avoid having to assign a bunch of variables (should only run once, if at all; constraint should enforce only one value.)
FOR v_row IN
WITH parent_table AS (
SELECT h.inhparent AS parent_oid
FROM pg_catalog.pg_inherits h
JOIN pg_catalog.pg_class c ON h.inhrelid = c.oid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name
), sibling_children AS (
SELECT i.inhrelid::regclass::text AS tablename
FROM pg_inherits i
JOIN parent_table p ON i.inhparent = p.parent_oid
)
SELECT DISTINCT sub_partition_type
, sub_control
, sub_partition_interval
, sub_constraint_cols
, sub_premake
, sub_inherit_fk
, sub_retention
, sub_retention_schema
, sub_retention_keep_table
, sub_retention_keep_index
, sub_automatic_maintenance
, sub_epoch
, sub_optimize_trigger
, sub_optimize_constraint
, sub_infinite_time_partitions
, sub_jobmon
, sub_trigger_exception_handling
, sub_upsert
, sub_trigger_return_null
, sub_template_table
FROM @extschema@.part_config_sub a
JOIN sibling_children b on a.sub_parent = b.tablename LIMIT 1
LOOP
INSERT INTO @extschema@.part_config_sub (
sub_parent
, sub_partition_type
, sub_control
, sub_partition_interval
, sub_constraint_cols
, sub_premake
, sub_inherit_fk
, sub_retention
, sub_retention_schema
, sub_retention_keep_table
, sub_retention_keep_index
, sub_automatic_maintenance
, sub_epoch
, sub_optimize_trigger
, sub_optimize_constraint
, sub_infinite_time_partitions
, sub_jobmon
, sub_trigger_exception_handling
, sub_upsert
, sub_trigger_return_null
, sub_template_table)
VALUES (
p_parent_table
, v_row.sub_partition_type
, v_row.sub_control
, v_row.sub_partition_interval
, v_row.sub_constraint_cols
, v_row.sub_premake
, v_row.sub_inherit_fk
, v_row.sub_retention
, v_row.sub_retention_schema
, v_row.sub_retention_keep_table
, v_row.sub_retention_keep_index
, v_row.sub_automatic_maintenance
, v_row.sub_epoch
, v_row.sub_optimize_trigger
, v_row.sub_optimize_constraint
, v_row.sub_infinite_time_partitions
, v_row.sub_jobmon
, v_row.sub_trigger_exception_handling
, v_row.sub_upsert
, v_row.sub_trigger_return_null
, v_row.sub_template_table);
END LOOP;
IF v_control_type = 'time' OR (v_control_type = 'id' AND p_epoch <> 'none') THEN
CASE
WHEN p_interval = 'yearly' THEN
v_time_interval := '1 year';
WHEN p_interval = 'quarterly' THEN
v_time_interval := '3 months';
WHEN p_interval = 'monthly' THEN
v_time_interval := '1 month';
WHEN p_interval = 'weekly' THEN
v_time_interval := '1 week';
WHEN p_interval = 'daily' THEN
v_time_interval := '1 day';
WHEN p_interval = 'hourly' THEN
v_time_interval := '1 hour';
WHEN p_interval = 'half-hour' THEN
v_time_interval := '30 mins';
WHEN p_interval = 'quarter-hour' THEN
v_time_interval := '15 mins';
ELSE
IF p_type <> 'native' THEN
-- Reset for use as part_config type value below
p_type = 'time-custom';
END IF;
v_time_interval := p_interval::interval;
IF v_time_interval < '1 second'::interval THEN
RAISE EXCEPTION 'Partitioning interval must be 1 second or greater';
END IF;
END CASE;
-- First partition is either the min premake or p_start_partition
v_start_time := COALESCE(p_start_partition::timestamptz, CURRENT_TIMESTAMP - (v_time_interval * p_premake));
IF v_time_interval >= '1 year' THEN
v_base_timestamp := date_trunc('year', v_start_time);
IF v_time_interval >= '10 years' THEN
v_base_timestamp := date_trunc('decade', v_start_time);
IF v_time_interval >= '100 years' THEN
v_base_timestamp := date_trunc('century', v_start_time);
IF v_time_interval >= '1000 years' THEN
v_base_timestamp := date_trunc('millennium', v_start_time);
END IF; -- 1000
END IF; -- 100
END IF; -- 10
END IF; -- 1
v_datetime_string := 'YYYY';
IF v_time_interval < '1 year' THEN
IF p_interval = 'quarterly' THEN
v_base_timestamp := date_trunc('quarter', v_start_time);
v_datetime_string = 'YYYY"q"Q';
ELSE
v_base_timestamp := date_trunc('month', v_start_time);
v_datetime_string := v_datetime_string || '_MM';
END IF;
IF v_time_interval < '1 month' THEN
IF p_interval = 'weekly' THEN
v_base_timestamp := date_trunc('week', v_start_time);
v_datetime_string := 'IYYY"w"IW';
ELSE
v_base_timestamp := date_trunc('day', v_start_time);
v_datetime_string := v_datetime_string || '_DD';
END IF;
IF v_time_interval < '1 day' THEN
v_base_timestamp := date_trunc('hour', v_start_time);
v_datetime_string := v_datetime_string || '_HH24MI';
IF v_time_interval < '1 minute' THEN
v_base_timestamp := date_trunc('minute', v_start_time);
v_datetime_string := v_datetime_string || 'SS';
END IF; -- minute
END IF; -- day
END IF; -- month
END IF; -- year
v_partition_time_array := array_append(v_partition_time_array, v_base_timestamp);
LOOP
-- If current loop value is less than or equal to the value of the max premake, add time to array.
IF (v_base_timestamp + (v_time_interval * v_count)) < (CURRENT_TIMESTAMP + (v_time_interval * p_premake)) THEN
BEGIN
v_partition_time := (v_base_timestamp + (v_time_interval * v_count))::timestamptz;
v_partition_time_array := array_append(v_partition_time_array, v_partition_time);
EXCEPTION WHEN datetime_field_overflow THEN
RAISE WARNING 'Attempted partition time interval is outside PostgreSQL''s supported time range.
Child partition creation after time % skipped', v_partition_time;
v_step_overflow_id := add_step(v_job_id, 'Attempted partition time interval is outside PostgreSQL''s supported time range.');
PERFORM update_step(v_step_overflow_id, 'CRITICAL', 'Child partition creation after time '||v_partition_time||' skipped');
CONTINUE;
END;
ELSE
EXIT; -- all needed partitions added to array. Exit the loop.
END IF;
v_count := v_count + 1;
END LOOP;
INSERT INTO @extschema@.part_config (
parent_table
, partition_type
, partition_interval
, epoch
, control
, premake
, constraint_cols
, datetime_string
, automatic_maintenance
, inherit_fk
, jobmon
, upsert
, trigger_return_null
, template_table)
VALUES (
p_parent_table
, p_type
, v_time_interval
, p_epoch
, p_control
, p_premake
, p_constraint_cols
, v_datetime_string
, p_automatic_maintenance
, p_inherit_fk
, p_jobmon
, p_upsert
, p_trigger_return_null
, v_template_schema||'.'||v_template_tablename);
v_last_partition_created := @extschema@.create_partition_time(p_parent_table, v_partition_time_array, false);
IF v_last_partition_created = false THEN
-- This can happen with subpartitioning when future or past partitions prevent child creation because they're out of range of the parent
-- First see if this parent is a subpartition managed by pg_partman
WITH top_oid AS (
SELECT i.inhparent AS top_parent_oid
FROM pg_catalog.pg_inherits i
JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name
) SELECT n.nspname, c.relname
INTO v_top_parent_schema, v_top_parent_table
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
JOIN top_oid t ON c.oid = t.top_parent_oid
JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname;
IF v_top_parent_table IS NOT NULL THEN
-- If so create the lowest possible partition that is within the boundary of the parent
SELECT child_start_time INTO v_parent_partition_timestamp FROM @extschema@.show_partition_info(p_parent_table, p_parent_table := v_top_parent_schema||'.'||v_top_parent_table);
IF v_base_timestamp >= v_parent_partition_timestamp THEN
WHILE v_base_timestamp >= v_parent_partition_timestamp LOOP
v_base_timestamp := v_base_timestamp - v_time_interval;
END LOOP;
v_base_timestamp := v_base_timestamp + v_time_interval; -- add one back since while loop set it one lower than is needed
ELSIF v_base_timestamp < v_parent_partition_timestamp THEN
WHILE v_base_timestamp < v_parent_partition_timestamp LOOP
v_base_timestamp := v_base_timestamp + v_time_interval;
END LOOP;
-- Don't need to remove one since new starting time will fit in top parent interval
END IF;
v_partition_time_array := NULL;
v_partition_time_array := array_append(v_partition_time_array, v_base_timestamp);
v_last_partition_created := @extschema@.create_partition_time(p_parent_table, v_partition_time_array, false);
ELSE
RAISE WARNING 'No child tables created. Check that all child tables did not already exist and may not have been part of partition set. Given parent has still been configured with pg_partman, but may not have expected children. Please review schema and config to confirm things are ok.';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
IF v_step_overflow_id IS NOT NULL THEN
PERFORM fail_job(v_job_id);
ELSE
PERFORM close_job(v_job_id);
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
RETURN v_success;
END IF;
END IF; -- End v_last_partition IF
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', format('Time partitions premade: %s', p_premake));
END IF;
END IF;
IF v_control_type = 'id' AND p_epoch = 'none' THEN
v_id_interval := p_interval::bigint;
IF p_type <> 'native' AND v_id_interval < 10 THEN
RAISE EXCEPTION 'Interval for serial, non-native partitioning must be greater than or equal to 10';
END IF;
-- Check if parent table is a subpartition of an already existing id partition set managed by pg_partman.
WHILE v_higher_parent_table IS NOT NULL LOOP -- initially set in DECLARE
WITH top_oid AS (
SELECT i.inhparent AS top_parent_oid
FROM pg_catalog.pg_inherits i
JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE n.nspname = v_higher_parent_schema::name
AND c.relname = v_higher_parent_table::name
) SELECT n.nspname, c.relname, p.control
INTO v_higher_parent_schema, v_higher_parent_table, v_higher_parent_control
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
JOIN top_oid t ON c.oid = t.top_parent_oid
JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname;
IF v_higher_parent_table IS NOT NULL THEN
SELECT general_type INTO v_higher_control_type
FROM @extschema@.check_control_type(v_higher_parent_schema, v_higher_parent_table, v_higher_parent_control);
IF v_higher_control_type <> 'id' THEN
-- The parent above the p_parent_table parameter is not partitioned by ID
-- so don't check for max values in parents that aren't partitioned by ID.
-- This avoids missing child tables in subpartition sets that have differing ID data
EXIT;
END IF;
-- v_top_parent initially set in DECLARE
v_top_parent_schema := v_higher_parent_schema;
v_top_parent_table := v_higher_parent_table;
END IF;
END LOOP;
-- If custom start partition is set, use that.
-- If custom start is not set and there is already data, start partitioning with the highest current value and ensure it's grabbed from highest top parent table
IF p_start_partition IS NOT NULL THEN
v_max := p_start_partition::bigint;
ELSE
v_sql := format('SELECT COALESCE(max(%I)::bigint, 0) FROM %I.%I LIMIT 1'
, p_control
, v_top_parent_schema
, v_top_parent_table);
EXECUTE v_sql INTO v_max;
END IF;
v_starting_partition_id := v_max - (v_max % v_id_interval);
FOR i IN 0..p_premake LOOP
-- Only make previous partitions if ID value is less than the starting value and positive (and custom start partition wasn't set)
IF p_start_partition IS NULL AND
(v_starting_partition_id - (v_id_interval*i)) > 0 AND
(v_starting_partition_id - (v_id_interval*i)) < v_starting_partition_id
THEN
v_partition_id_array = array_append(v_partition_id_array, (v_starting_partition_id - v_id_interval*i));
END IF;
v_partition_id_array = array_append(v_partition_id_array, (v_id_interval*i) + v_starting_partition_id);
END LOOP;
INSERT INTO @extschema@.part_config (
parent_table
, partition_type
, partition_interval
, control
, premake
, constraint_cols
, automatic_maintenance
, inherit_fk
, jobmon
, upsert
, trigger_return_null
, template_table)
VALUES (
p_parent_table
, p_type
, v_id_interval
, p_control
, p_premake
, p_constraint_cols
, p_automatic_maintenance
, p_inherit_fk
, p_jobmon
, p_upsert
, p_trigger_return_null
, v_template_schema||'.'||v_template_tablename);
v_last_partition_created := @extschema@.create_partition_id(p_parent_table, v_partition_id_array, false);
IF v_last_partition_created = false THEN
-- This can happen with subpartitioning when future or past partitions prevent child creation because they're out of range of the parent
-- See if it's actually a subpartition of a parent id partition
WITH top_oid AS (
SELECT i.inhparent AS top_parent_oid
FROM pg_catalog.pg_inherits i
JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name
) SELECT n.nspname||'.'||c.relname
INTO v_top_parent_table
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
JOIN top_oid t ON c.oid = t.top_parent_oid
JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname;
IF v_top_parent_table IS NOT NULL THEN
-- Create the lowest possible partition that is within the boundary of the parent
SELECT child_start_id INTO v_parent_partition_id FROM @extschema@.show_partition_info(p_parent_table, p_parent_table := v_top_parent_table);
IF v_starting_partition_id >= v_parent_partition_id THEN
WHILE v_starting_partition_id >= v_parent_partition_id LOOP
v_starting_partition_id := v_starting_partition_id - v_id_interval;
END LOOP;
v_starting_partition_id := v_starting_partition_id + v_id_interval; -- add one back since while loop set it one lower than is needed
ELSIF v_starting_partition_id < v_parent_partition_id THEN
WHILE v_starting_partition_id < v_parent_partition_id LOOP
v_starting_partition_id := v_starting_partition_id + v_id_interval;
END LOOP;
-- Don't need to remove one since new starting id will fit in top parent interval
END IF;
v_partition_id_array = NULL;
v_partition_id_array = array_append(v_partition_id_array, v_starting_partition_id);
v_last_partition_created := @extschema@.create_partition_id(p_parent_table, v_partition_id_array, false);
ELSE
-- Currently unknown edge case if code gets here
RAISE WARNING 'No child tables created. Check that all child tables did not already exist and may not have been part of partition set. Given parent has still been configured with pg_partman, but may not have expected children. Please review schema and config to confirm things are ok.';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
IF v_step_overflow_id IS NOT NULL THEN
PERFORM fail_job(v_job_id);
ELSE
PERFORM close_job(v_job_id);
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
RETURN v_success;
END IF;
END IF; -- End v_last_partition_created IF
END IF; -- End IF id
IF p_type <> 'native' THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Creating partition function');
END IF;
IF v_control_type = 'time' OR (v_control_type = 'id' AND p_epoch <> 'none') THEN
PERFORM @extschema@.create_function_time(p_parent_table, v_job_id);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Time function created');
END IF;
ELSIF v_control_type = 'id' THEN
PERFORM @extschema@.create_function_id(p_parent_table, v_job_id);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'ID function created');
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Creating partition trigger');
END IF;
PERFORM @extschema@.create_trigger(p_parent_table);
END IF; -- end native check
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
IF v_step_overflow_id IS NOT NULL THEN
PERFORM fail_job(v_job_id);
ELSE
PERFORM close_job(v_job_id);
END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
v_success := true;
RETURN v_success;
EXCEPTION
WHEN OTHERS THEN
GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
ex_context = PG_EXCEPTION_CONTEXT,
ex_detail = PG_EXCEPTION_DETAIL,
ex_hint = PG_EXCEPTION_HINT;
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NULL THEN
EXECUTE format('SELECT %I.add_job(''PARTMAN CREATE PARENT: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''Partition creation for table '||p_parent_table||' failed'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
ELSIF v_step_id IS NULL THEN
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
END IF;
EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
END IF;
RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;
CREATE OR REPLACE FUNCTION show_partition_name(p_parent_table text, p_value text, OUT partition_schema text, OUT partition_table text, OUT suffix_timestamp timestamptz, OUT suffix_id bigint, OUT table_exists boolean) RETURNS record
LANGUAGE plpgsql STABLE
AS $$
DECLARE
v_child_end_time timestamptz;
v_child_exists text;
v_child_larger boolean := false;
v_child_smaller boolean := false;
v_child_start_time timestamptz;
v_control text;
v_control_type text;
v_datetime_string text;
v_epoch text;
v_given_timestamp timestamptz;
v_max_range timestamptz;
v_min_range timestamptz;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval text;
v_row record;
v_type text;
BEGIN
/*
* Given a parent table and partition value, return the name of the child partition it would go in.
* If using epoch time partitioning, give the text representation of the timestamp NOT the epoch integer value (use to_timestamp() to convert epoch values).
* Also returns just the suffix value and true if the child table exists or false if it does not
*/
SELECT partition_type
, control
, partition_interval
, datetime_string
, epoch
INTO v_type
, v_control
, v_partition_interval
, v_datetime_string
, v_epoch
FROM @extschema@.part_config
WHERE parent_table = p_parent_table;
IF v_type IS NULL THEN
RAISE EXCEPTION 'Parent table given is not managed by pg_partman (%)', p_parent_table;
END IF;
SELECT n.nspname, c.relname INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;
IF v_parent_tablename IS NULL THEN
RAISE EXCEPTION 'Parent table given does not exist (%)', p_parent_table;
END IF;
partition_schema := v_parent_schema;
SELECT general_type INTO v_control_type FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, v_control);
IF ( (v_control_type = 'time') OR (v_control_type = 'id' AND v_epoch <> 'none') ) THEN
v_given_timestamp := p_value::timestamptz;
FOR v_row IN
SELECT partition_schemaname ||'.'|| partition_tablename AS child_table FROM @extschema@.show_partitions(p_parent_table, 'DESC')
LOOP
SELECT child_start_time INTO v_child_start_time
FROM @extschema@.show_partition_info(v_row.child_table, v_partition_interval, p_parent_table);
-- Don't use child_end_time from above function to avoid edge cases around user supplied timestamps
v_child_end_time := v_child_start_time + v_partition_interval::interval;
IF v_given_timestamp >= v_child_end_time THEN
-- given value is higher than any existing child table. handled below.
v_child_larger := true;
EXIT;
END IF;
IF v_given_timestamp >= v_child_start_time THEN
-- found target child table
v_child_smaller := false;
suffix_timestamp := v_child_start_time;
EXIT;
END IF;
-- Should only get here if no matching child table was found. handled below.
v_child_smaller := true;
END LOOP;
IF v_child_start_time IS NULL OR v_child_end_time IS NULL THEN
-- This should never happen since there should never be a partition set without children.
-- Handling just in case so issues can be reported with context
RAISE EXCEPTION 'Unexpected code path encountered in show_partition_name(). Please report this issue to author with relevant partition config info.';
END IF;
IF v_child_larger THEN
LOOP
-- keep adding interval until found
v_child_start_time := v_child_start_time + v_partition_interval::interval;
v_child_end_time := v_child_end_time + v_partition_interval::interval;
IF v_given_timestamp >= v_child_start_time AND v_given_timestamp < v_child_end_time THEN
suffix_timestamp := v_child_start_time;
EXIT;
END IF;
END LOOP;
ELSIF v_child_smaller THEN
LOOP
-- keep subtracting interval until found
v_child_start_time := v_child_start_time - v_partition_interval::interval;
v_child_end_time := v_child_end_time - v_partition_interval::interval;
IF v_given_timestamp >= v_child_start_time AND v_given_timestamp < v_child_end_time THEN
suffix_timestamp := v_child_start_time;
EXIT;
END IF;
END LOOP;
END IF;
partition_table := @extschema@.check_name_length(v_parent_tablename, to_char(suffix_timestamp, v_datetime_string), TRUE);
ELSIF v_control_type = 'id' AND v_type <> 'time-custom' THEN
suffix_id := (p_value::bigint - (p_value::bigint % v_partition_interval::bigint));
partition_table := @extschema@.check_name_length(v_parent_tablename, suffix_id::text, TRUE);
ELSIF v_type = 'time-custom' THEN
SELECT child_table, lower(partition_range) INTO partition_table, suffix_timestamp FROM @extschema@.custom_time_partitions
WHERE parent_table = p_parent_table AND partition_range @> p_value::timestamptz;
IF partition_table IS NULL THEN
SELECT max(upper(partition_range)) INTO v_max_range FROM @extschema@.custom_time_partitions WHERE parent_table = p_parent_table;
SELECT min(lower(partition_range)) INTO v_min_range FROM @extschema@.custom_time_partitions WHERE parent_table = p_parent_table;
IF p_value::timestamptz >= v_max_range THEN
suffix_timestamp := v_max_range;
LOOP
-- Keep incrementing higher until given value is below the upper range
suffix_timestamp := suffix_timestamp + v_partition_interval::interval;
IF p_value::timestamptz < suffix_timestamp THEN
-- Have to subtract one interval because the value would actually be in the partition previous
-- to this partition timestamp since the partition names contain the lower boundary
suffix_timestamp := suffix_timestamp - v_partition_interval::interval;
EXIT;
END IF;
END LOOP;
ELSIF p_value::timestamptz < v_min_range THEN
suffix_timestamp := v_min_range;
LOOP
-- Keep decrementing lower until given value is below or equal to the lower range
suffix_timestamp := suffix_timestamp - v_partition_interval::interval;
IF p_value::timestamptz >= suffix_timestamp THEN
EXIT;
END IF;
END LOOP;
ELSE
RAISE EXCEPTION 'Unable to determine a valid child table for the given parent table and value';
END IF;
partition_table := @extschema@.check_name_length(v_parent_tablename, to_char(suffix_timestamp, v_datetime_string), TRUE);
END IF;
END IF;
SELECT tablename INTO v_child_exists
FROM pg_catalog.pg_tables
WHERE schemaname = partition_schema::name
AND tablename = partition_table::name;
IF v_child_exists IS NOT NULL THEN
table_exists := true;
ELSE
table_exists := false;
END IF;
RETURN;
END
$$;
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