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-- ************* CRITICAL MESSAGE **************
-- This file is only a transitional upgrade file to get from 1.8.8 to 2.0.0. See the CHANGELOG file for all relevant changes.
-- You MUST upgrade beyond this file/version to the latest version of the 2.x series. DO NOT continue running 2.0.0!!!!
-- ************* CRITICAL MESSAGE **************
ALTER TABLE @extschema@.part_config RENAME COLUMN "type" TO partition_type;
ALTER TABLE @extschema@.part_config_sub RENAME COLUMN "sub_type" to "sub_partition_type";
ALTER TABLE @extschema@.part_config RENAME COLUMN part_interval TO partition_interval;
ALTER TABLE @extschema@.part_config_sub RENAME COLUMN sub_part_interval TO sub_partition_interval;
--NOTE This function is in the table sql file
/*
* Ensure that sub-partitioned tables that are themselves sub-partitions have the same configuration options set when they are part of the same inheritance tree
*/
CREATE OR REPLACE FUNCTION @extschema@.check_subpart_sameconfig(text) RETURNS boolean
LANGUAGE sql STABLE
AS $$
WITH child_tables AS (
SELECT n.nspname||'.'||c.relname AS tablename
FROM pg_catalog.pg_inherits h
JOIN pg_catalog.pg_class c ON c.oid = h.inhrelid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE h.inhparent::regclass = $1::regclass
)
SELECT CASE
WHEN count(*) <= 1 THEN
true
WHEN count(*) > 1 THEN
false
END
FROM (
SELECT DISTINCT sub_partition_type
, sub_control
, sub_partition_interval
, sub_constraint_cols
, sub_premake
, sub_inherit_fk
, sub_retention
, sub_retention_schema
, sub_retention_keep_table
, sub_retention_keep_index
, sub_use_run_maintenance
, sub_jobmon
FROM @extschema@.part_config_sub a
JOIN child_tables b on a.sub_parent = b.tablename) x;
$$;
/*
* Check function for config table partition types
*/
CREATE OR REPLACE FUNCTION @extschema@.check_partition_type (p_type text) RETURNS boolean
LANGUAGE plpgsql IMMUTABLE SECURITY DEFINER
AS $$
DECLARE
v_result boolean;
BEGIN
SELECT p_type IN ('time', 'time-custom', 'id') INTO v_result;
RETURN v_result;
END
$$;
UPDATE @extschema@.part_config SET partition_type = 'time' WHERE partition_type = 'time-static' OR partition_type = 'time-dynamic';
UPDATE @extschema@.part_config_sub SET sub_partition_type = 'time' WHERE sub_partition_type = 'time-static' OR sub_partition_type = 'time-dynamic';
UPDATE @extschema@.part_config_sub SET sub_partition_type = 'id' WHERE sub_partition_type = 'id-static' OR sub_partition_type = 'id-dynamic';
/*
* Function to turn a table into the parent of a partition set
*/
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_use_run_maintenance boolean DEFAULT NULL
, p_start_partition text DEFAULT NULL
, p_inherit_fk boolean DEFAULT true
, 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_base_timestamp timestamp;
v_count int := 1;
v_datetime_string text;
v_higher_parent text := p_parent_table;
v_id_interval bigint;
v_id_position int;
v_job_id bigint;
v_jobmon_schema text;
v_last_partition_created boolean;
v_max bigint;
v_notnull boolean;
v_old_search_path text;
v_parent_partition_id bigint;
v_parent_partition_timestamp timestamp;
v_partition_time timestamp;
v_partition_time_array timestamp[];
v_partition_id_array bigint[];
v_row record;
v_run_maint boolean;
v_sql text;
v_start_time timestamp;
v_starting_partition_id bigint;
v_step_id bigint;
v_step_overflow_id bigint;
v_sub_parent text;
v_success boolean := false;
v_tablename text;
v_time_interval interval;
v_time_position int;
v_top_datetime_string text;
v_top_parent text := p_parent_table;
BEGIN
IF position('.' in p_parent_table) = 0 THEN
RAISE EXCEPTION 'Parent table must be schema qualified';
END IF;
SELECT tablename INTO v_tablename FROM pg_tables WHERE schemaname || '.' || tablename = p_parent_table;
IF v_tablename IS NULL THEN
RAISE EXCEPTION 'Please create given parent table first: %', p_parent_table;
END IF;
SELECT attnotnull INTO v_notnull FROM pg_attribute WHERE attrelid = p_parent_table::regclass AND attname = p_control;
IF v_notnull = false OR v_notnull IS NULL THEN
RAISE EXCEPTION 'Control column (%) for parent table (%) must be NOT NULL', p_control, p_parent_table;
END IF;
IF NOT @extschema@.check_partition_type(p_type) THEN
RAISE EXCEPTION '% is not a valid partitioning type', p_type;
END IF;
EXECUTE 'LOCK TABLE '||p_parent_table||' IN ACCESS EXCLUSIVE MODE';
IF p_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF p_use_run_maintenance IS NOT NULL THEN
IF p_use_run_maintenance IS FALSE AND (p_type = 'time' OR p_type = 'time-custom') THEN
RAISE EXCEPTION 'p_run_maintenance cannot be set to false for time based partitioning';
END IF;
v_run_maint := p_use_run_maintenance;
ELSIF p_type = 'time' OR p_type = 'time-custom' THEN
v_run_maint := TRUE;
ELSIF p_type = 'id' THEN
v_run_maint := FALSE;
ELSE
RAISE EXCEPTION 'use_run_maintenance value cannot be set NULL';
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN SETUP PARENT: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Creating initial partitions on new parent table: '||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_inherits h
where h.inhrelid::regclass = p_parent_table::regclass
), 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_use_run_maintenance
, sub_jobmon
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_use_run_maintenance
, sub_jobmon)
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_use_run_maintenance
, v_row.sub_jobmon);
END LOOP;
IF p_type = 'time' OR p_type = 'time-custom' 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 <> 'time-custom' THEN
RAISE EXCEPTION 'Must use a predefined time interval if not using type "time-custom". See documentation.';
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::timestamp, 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))::timestamp;
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
, control
, premake
, constraint_cols
, datetime_string
, use_run_maintenance
, inherit_fk
, jobmon)
VALUES (
p_parent_table
, p_type
, v_time_interval
, p_control
, p_premake
, p_constraint_cols
, v_datetime_string
, v_run_maint
, p_inherit_fk
, p_jobmon);
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 n.nspname||'.'||c.relname = p_parent_table
) SELECT n.nspname||'.'||c.relname, p.datetime_string
INTO v_top_parent, v_top_datetime_string
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 IS NOT NULL THEN
-- If so create the lowest possible partition that is within the boundary of the parent
v_time_position := (length(p_parent_table) - position('p_' in reverse(p_parent_table))) + 2;
v_parent_partition_timestamp := to_timestamp(substring(p_parent_table from v_time_position), v_top_datetime_string);
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
-- Currently unknown edge case if code gets here
RAISE EXCEPTION 'No child tables created. Unexpected edge case encountered. Please report this error to author with conditions that led to it.';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Time partitions premade: '||p_premake);
END IF;
END IF;
IF p_type = 'id' THEN
v_id_interval := p_interval::bigint;
IF v_id_interval < 10 THEN
RAISE EXCEPTION 'Interval for serial 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 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||'.'||c.relname = v_higher_parent
) SELECT n.nspname||'.'||c.relname
INTO v_higher_parent
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
WHERE p.partition_type = 'id';
IF v_higher_parent IS NOT NULL THEN
-- v_top_parent initially set in DECLARE
v_top_parent := v_higher_parent;
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
v_sql := 'SELECT COALESCE('||quote_nullable(p_start_partition::bigint)||', max('||p_control||')::bigint, 0) FROM '||v_top_parent||' LIMIT 1';
EXECUTE v_sql INTO v_max;
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
, use_run_maintenance
, inherit_fk
, jobmon)
VALUES (
p_parent_table
, p_type
, v_id_interval
, p_control
, p_premake
, p_constraint_cols
, v_run_maint
, p_inherit_fk
, p_jobmon);
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 n.nspname||'.'||c.relname = p_parent_table
) SELECT n.nspname||'.'||c.relname
INTO v_top_parent
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
WHERE p.partition_type = 'id';
IF v_top_parent IS NOT NULL THEN
-- Create the lowest possible partition that is within the boundary of the parent
v_id_position := (length(p_parent_table) - position('p_' in reverse(p_parent_table))) + 2;
v_parent_partition_id = substring(p_parent_table from v_id_position)::bigint;
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 EXCEPTION 'No child tables created. Unexpected edge case encountered. Please report this error to author with conditions that led to it.';
END IF;
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Creating partition function');
END IF;
IF p_type = 'time' OR p_type = 'time-custom' THEN
PERFORM @extschema@.create_function_time(p_parent_table);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Time function created');
END IF;
ELSIF p_type = 'id' THEN
PERFORM @extschema@.create_function_id(p_parent_table);
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);
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;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 the trigger function for the parent table of an id-based partition set
*/
CREATE OR REPLACE FUNCTION create_function_id(p_parent_table text) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_control text;
v_count int;
v_current_partition_name text;
v_current_partition_id bigint;
v_datetime_string text;
v_final_partition_id bigint;
v_function_name text;
v_higher_parent text := p_parent_table;
v_id_position int;
v_job_id bigint;
v_jobmon text;
v_jobmon_schema text;
v_last_partition text;
v_max bigint;
v_next_partition_id bigint;
v_next_partition_name text;
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval bigint;
v_premake int;
v_prev_partition_id bigint;
v_prev_partition_name text;
v_row_max_id record;
v_run_maint boolean;
v_step_id bigint;
v_top_parent text := p_parent_table;
v_trig_func text;
BEGIN
SELECT partition_interval::bigint
, control
, premake
, use_run_maintenance
, jobmon
INTO v_partition_interval
, v_control
, v_premake
, v_run_maint
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'id';
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
SELECT show_partitions INTO v_last_partition FROM @extschema@.show_partitions(p_parent_table, 'DESC') LIMIT 1;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN CREATE FUNCTION: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Creating partition function for table '||p_parent_table);
END IF;
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_catalog.pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
v_function_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, '_part_trig_func', FALSE);
-- Get the highest level top parent if multi-level partitioned in order to get proper max() value below
WHILE v_higher_parent 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||'.'||c.relname = v_higher_parent
) SELECT n.nspname||'.'||c.relname
INTO v_higher_parent
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
WHERE p.partition_type = 'id';
IF v_higher_parent IS NOT NULL THEN
-- initially set in DECLARE
v_top_parent := v_higher_parent;
END IF;
END LOOP;
-- Loop through child tables starting from highest to get current max value in partition set
-- Avoids doing a scan on entire partition set and/or getting any values accidentally in parent.
FOR v_row_max_id IN
SELECT show_partitions FROM @extschema@.show_partitions(v_top_parent, 'DESC')
LOOP
EXECUTE 'SELECT max('||v_control||') FROM '||v_row_max_id.show_partitions INTO v_max;
IF v_max IS NOT NULL THEN
EXIT;
END IF;
END LOOP;
IF v_max IS NULL THEN
v_max := 0;
END IF;
v_current_partition_id = v_max - (v_max % v_partition_interval);
v_next_partition_id := v_current_partition_id + v_partition_interval;
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_current_partition_id::text, TRUE);
v_trig_func := 'CREATE OR REPLACE FUNCTION '||v_function_name||'() RETURNS trigger LANGUAGE plpgsql AS $t$
DECLARE
v_count int;
v_current_partition_id bigint;
v_current_partition_name text;
v_id_position int;
v_last_partition text := '||quote_literal(v_last_partition)||';
v_next_partition_id bigint;
v_next_partition_name text;
v_partition_created boolean;
BEGIN
IF TG_OP = ''INSERT'' THEN
IF NEW.'||v_control||' >= '||v_current_partition_id||' AND NEW.'||v_control||' < '||v_next_partition_id|| ' THEN ';
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname ||'.'||tablename = v_current_partition_name;
IF v_count > 0 THEN
v_trig_func := v_trig_func || '
INSERT INTO '||v_current_partition_name||' VALUES (NEW.*); ';
ELSE
v_trig_func := v_trig_func || '
-- Child table for current values does not exist in this partition set, so write to parent
RETURN NEW;';
END IF;
FOR i IN 1..v_premake LOOP
v_prev_partition_id := v_current_partition_id - (v_partition_interval * i);
v_next_partition_id := v_current_partition_id + (v_partition_interval * i);
v_final_partition_id := v_next_partition_id + v_partition_interval;
v_prev_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_prev_partition_id::text, TRUE);
v_next_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_next_partition_id::text, TRUE);
-- Check that child table exist before making a rule to insert to them.
-- Handles edge case of changing premake immediately after running create_parent().
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname ||'.'||tablename = v_prev_partition_name;
IF v_count > 0 THEN
-- Only handle previous partitions if they're starting above zero
IF v_prev_partition_id >= 0 THEN
v_trig_func := v_trig_func ||'
ELSIF NEW.'||v_control||' >= '||v_prev_partition_id||' AND NEW.'||v_control||' < '||v_prev_partition_id + v_partition_interval|| ' THEN
INSERT INTO '||v_prev_partition_name||' VALUES (NEW.*); ';
END IF;
END IF;
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname ||'.'||tablename = v_next_partition_name;
IF v_count > 0 THEN
v_trig_func := v_trig_func ||'
ELSIF NEW.'||v_control||' >= '||v_next_partition_id||' AND NEW.'||v_control||' < '||v_final_partition_id|| ' THEN
INSERT INTO '||v_next_partition_name||' VALUES (NEW.*);';
END IF;
END LOOP;
v_trig_func := v_trig_func ||'
ELSE
v_current_partition_id := NEW.'||v_control||' - (NEW.'||v_control||' % '||v_partition_interval||');
v_current_partition_name := @extschema@.check_name_length('''||v_parent_tablename||''', '''||v_parent_schema||''', v_current_partition_id::text, TRUE);
SELECT count(*) INTO v_count FROM pg_tables WHERE schemaname ||''.''|| tablename = v_current_partition_name;
IF v_count > 0 THEN
EXECUTE ''INSERT INTO ''||v_current_partition_name||'' VALUES($1.*)'' USING NEW;
ELSE
RETURN NEW;
END IF;
END IF;';
IF v_run_maint IS FALSE THEN
v_trig_func := v_trig_func ||'
v_current_partition_id := NEW.'||v_control||' - (NEW.'||v_control||' % '||v_partition_interval||');
IF (NEW.'||v_control||' % '||v_partition_interval||') > ('||v_partition_interval||' / 2) THEN
v_id_position := (length(v_last_partition) - position(''p_'' in reverse(v_last_partition))) + 2;
v_next_partition_id := (substring(v_last_partition from v_id_position)::bigint) + '||v_partition_interval||';
WHILE ((v_next_partition_id - v_current_partition_id) / '||v_partition_interval||') <= '||v_premake||' LOOP
v_partition_created := @extschema@.create_partition_id('||quote_literal(p_parent_table)||', ARRAY[v_next_partition_id]);
IF v_partition_created THEN
PERFORM @extschema@.create_function_id('||quote_literal(p_parent_table)||');
PERFORM @extschema@.apply_constraints('||quote_literal(p_parent_table)||');
END IF;
v_next_partition_id := v_next_partition_id + '||v_partition_interval||';
END LOOP;
END IF;';
END IF;
v_trig_func := v_trig_func ||'
END IF;
RETURN NULL;
END $t$;';
EXECUTE v_trig_func;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Added function for current id interval: '||v_current_partition_id||' to '||v_final_partition_id-1);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 FUNCTION: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''Partition function maintenance for table %s 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 the trigger function for the parent table of a time-based partition set
*/
CREATE OR REPLACE FUNCTION create_function_time(p_parent_table text) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_control text;
v_count int;
v_current_partition_name text;
v_current_partition_timestamp timestamptz;
v_datetime_string text;
v_final_partition_timestamp timestamptz;
v_function_name text;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_old_search_path text;
v_new_length int;
v_next_partition_name text;
v_next_partition_timestamp timestamptz;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval interval;
v_premake int;
v_prev_partition_name text;
v_prev_partition_timestamp timestamptz;
v_step_id bigint;
v_trig_func text;
v_type text;
BEGIN
SELECT partition_type
, partition_interval::interval
, control
, premake
, datetime_string
, jobmon
INTO v_type
, v_partition_interval
, v_control
, v_premake
, v_datetime_string
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN CREATE FUNCTION: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Creating partition function for table '||p_parent_table);
END IF;
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
v_function_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, '_part_trig_func', FALSE);
IF v_type = 'time' THEN
v_trig_func := 'CREATE OR REPLACE FUNCTION '||v_function_name||'() RETURNS trigger LANGUAGE plpgsql AS $t$
DECLARE
v_count int;
v_partition_name text;
v_partition_timestamp timestamptz;
BEGIN
IF TG_OP = ''INSERT'' THEN
';
CASE
WHEN v_partition_interval = '15 mins' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''hour'', NEW.'||v_control||') +
''15min''::interval * floor(date_part(''minute'', NEW.'||v_control||') / 15.0);';
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP) +
'15min'::interval * floor(date_part('minute', CURRENT_TIMESTAMP) / 15.0);
WHEN v_partition_interval = '30 mins' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''hour'', NEW.'||v_control||') +
''30min''::interval * floor(date_part(''minute'', NEW.'||v_control||') / 30.0);';
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP) +
'30min'::interval * floor(date_part('minute', CURRENT_TIMESTAMP) / 30.0);
WHEN v_partition_interval = '1 hour' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''hour'', NEW.'||v_control||');';
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 day' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''day'', NEW.'||v_control||');';
v_current_partition_timestamp := date_trunc('day', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 week' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''week'', NEW.'||v_control||');';
v_current_partition_timestamp := date_trunc('week', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 month' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''month'', NEW.'||v_control||');';
v_current_partition_timestamp := date_trunc('month', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '3 months' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''quarter'', NEW.'||v_control||');';
v_current_partition_timestamp := date_trunc('quarter', CURRENT_TIMESTAMP);
WHEN v_partition_interval = '1 year' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''year'', NEW.'||v_control||');';
v_current_partition_timestamp := date_trunc('year', CURRENT_TIMESTAMP);
END CASE;
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, to_char(v_current_partition_timestamp, v_datetime_string), TRUE);
v_next_partition_timestamp := v_current_partition_timestamp + v_partition_interval::interval;
v_trig_func := v_trig_func ||'
IF NEW.'||v_control||' >= '||quote_literal(v_current_partition_timestamp)||' AND NEW.'||v_control||' < '||quote_literal(v_next_partition_timestamp)|| ' THEN ';
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname ||'.'||tablename = v_current_partition_name;
IF v_count > 0 THEN
v_trig_func := v_trig_func || '
INSERT INTO '||v_current_partition_name||' VALUES (NEW.*); ';
ELSE
v_trig_func := v_trig_func || '
-- Child table for current values does not exist in this partition set, so write to parent
RETURN NEW;';
END IF;
FOR i IN 1..v_premake LOOP
v_prev_partition_timestamp := v_current_partition_timestamp - (v_partition_interval::interval * i);
v_next_partition_timestamp := v_current_partition_timestamp + (v_partition_interval::interval * i);
v_final_partition_timestamp := v_next_partition_timestamp + (v_partition_interval::interval);
v_prev_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, to_char(v_prev_partition_timestamp, v_datetime_string), TRUE);
v_next_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, to_char(v_next_partition_timestamp, v_datetime_string), TRUE);
-- Check that child table exist before making a rule to insert to them.
-- Handles edge case of changing premake immediately after running create_parent().
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname ||'.'||tablename = v_prev_partition_name;
IF v_count > 0 THEN
v_trig_func := v_trig_func ||'
ELSIF NEW.'||v_control||' >= '||quote_literal(v_prev_partition_timestamp)||' AND NEW.'||v_control||' < '||
quote_literal(v_prev_partition_timestamp + v_partition_interval::interval)|| ' THEN
INSERT INTO '||v_prev_partition_name||' VALUES (NEW.*);';
END IF;
SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname ||'.'||tablename = v_next_partition_name;
IF v_count > 0 THEN
v_trig_func := v_trig_func ||'
ELSIF NEW.'||v_control||' >= '||quote_literal(v_next_partition_timestamp)||' AND NEW.'||v_control||' < '||
quote_literal(v_final_partition_timestamp)|| ' THEN
INSERT INTO '||v_next_partition_name||' VALUES (NEW.*);';
END IF;
END LOOP;
v_trig_func := v_trig_func||'
ELSE
v_partition_name := @extschema@.check_name_length('''||v_parent_tablename||''', '''||v_parent_schema||''', to_char(v_partition_timestamp, '||quote_literal(v_datetime_string)||'), TRUE);
SELECT count(*) INTO v_count FROM pg_tables WHERE schemaname ||''.''|| tablename = v_partition_name;
IF v_count > 0 THEN
EXECUTE ''INSERT INTO ''||v_partition_name||'' VALUES($1.*)'' USING NEW;
ELSE
RETURN NEW;
END IF;
END IF;';
v_trig_func := v_trig_func ||'
END IF;
RETURN NULL;
END $t$;';
EXECUTE v_trig_func;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Added function for current time interval: '||
v_current_partition_timestamp||' to '||(v_final_partition_timestamp-'1sec'::interval));
END IF;
ELSIF v_type = 'time-custom' THEN
v_trig_func := 'CREATE OR REPLACE FUNCTION '||v_function_name||'() RETURNS trigger LANGUAGE plpgsql AS $t$
DECLARE
v_child_table text;
v_count int;
BEGIN
SELECT child_table INTO v_child_table
FROM @extschema@.custom_time_partitions
WHERE partition_range @> NEW.'||v_control||'
AND parent_table = '||quote_literal(p_parent_table)||';
SELECT count(*) INTO v_count FROM pg_tables WHERE schemaname ||''.''|| tablename = v_child_table;
IF v_count > 0 THEN
EXECUTE ''INSERT INTO ''||v_child_table||'' VALUES ($1.*)'' USING NEW;
ELSE
RETURN NEW;
END IF;
RETURN NULL;
END $t$;';
EXECUTE v_trig_func;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Added function for custom time table: '||p_parent_table);
END IF;
ELSE
RAISE EXCEPTION 'ERROR: Invalid time partitioning type given: %', v_type;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 FUNCTION: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''Partition function maintenance for table %s 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
$$;
/*
* Function to create id partitions
*/
CREATE OR REPLACE FUNCTION create_partition_id(p_parent_table text, p_partition_ids bigint[], p_analyze boolean DEFAULT true) RETURNS boolean
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_all text[] := ARRAY['SELECT', 'INSERT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER'];
v_analyze boolean := FALSE;
v_control text;
v_grantees text[];
v_hasoids boolean;
v_id bigint;
v_inherit_fk boolean;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_old_search_path text;
v_parent_grant record;
v_parent_owner text;
v_parent_schema text;
v_parent_tablename text;
v_parent_tablespace text;
v_partition_interval bigint;
v_partition_created boolean := false;
v_partition_name text;
v_revoke text[];
v_row record;
v_sql text;
v_step_id bigint;
v_sub_id_max bigint;
v_sub_id_min bigint;
v_tablename text;
v_unlogged char;
BEGIN
SELECT control
, partition_interval
, inherit_fk
, jobmon
INTO v_control
, v_partition_interval
, v_inherit_fk
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'id';
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
-- Determine if this table is a child of a subpartition parent. If so, get limits of what child tables can be created based on parent suffix
SELECT sub_min::bigint, sub_max::bigint INTO v_sub_id_min, v_sub_id_max FROM @extschema@.check_subpartition_limits(p_parent_table, 'id');
SELECT tableowner, schemaname, tablename, tablespace INTO v_parent_owner, v_parent_schema, v_parent_tablename, v_parent_tablespace FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN CREATE TABLE: '||p_parent_table);
END IF;
FOREACH v_id IN ARRAY p_partition_ids LOOP
-- Do not create the child table if it's outside the bounds of the top parent.
IF v_sub_id_min IS NOT NULL THEN
IF v_id < v_sub_id_min OR v_id > v_sub_id_max THEN
CONTINUE;
END IF;
END IF;
v_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_id::text, TRUE);
-- If child table already exists, skip creation
SELECT tablename INTO v_tablename FROM pg_catalog.pg_tables WHERE schemaname ||'.'|| tablename = v_partition_name;
IF v_tablename IS NOT NULL THEN
CONTINUE;
END IF;
-- Ensure analyze is run if a new partition is created. Otherwise if one isn't, will be false and analyze will be skipped
v_analyze := TRUE;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Creating new partition '||v_partition_name||' with interval from '||v_id||' to '||(v_id + v_partition_interval)-1);
END IF;
SELECT relpersistence INTO v_unlogged FROM pg_catalog.pg_class WHERE oid::regclass = p_parent_table::regclass;
v_sql := 'CREATE';
IF v_unlogged = 'u' THEN
v_sql := v_sql || ' UNLOGGED';
END IF;
v_sql := v_sql || ' TABLE '||v_partition_name||' (LIKE '||p_parent_table||' INCLUDING DEFAULTS INCLUDING CONSTRAINTS INCLUDING INDEXES INCLUDING STORAGE INCLUDING COMMENTS)';
SELECT relhasoids INTO v_hasoids FROM pg_catalog.pg_class WHERE oid::regclass = p_parent_table::regclass;
IF v_hasoids IS TRUE THEN
v_sql := v_sql || ' WITH (OIDS)';
END IF;
EXECUTE v_sql;
SELECT tablename INTO v_tablename FROM pg_catalog.pg_tables WHERE schemaname ||'.'|| tablename = v_partition_name;
IF v_parent_tablespace IS NOT NULL THEN
EXECUTE 'ALTER TABLE '||v_partition_name||' SET TABLESPACE '||v_parent_tablespace;
END IF;
EXECUTE 'ALTER TABLE '||v_partition_name||' ADD CONSTRAINT '||v_tablename||'_partition_check
CHECK ('||v_control||'>='||quote_literal(v_id)||' AND '||v_control||'<'||quote_literal(v_id + v_partition_interval)||')';
EXECUTE 'ALTER TABLE '||v_partition_name||' INHERIT '||p_parent_table;
FOR v_parent_grant IN
SELECT array_agg(DISTINCT privilege_type::text ORDER BY privilege_type::text) AS types, grantee
FROM information_schema.table_privileges
WHERE table_schema ||'.'|| table_name = p_parent_table
GROUP BY grantee
LOOP
EXECUTE 'GRANT '||array_to_string(v_parent_grant.types, ',')||' ON '||v_partition_name||' TO '||v_parent_grant.grantee;
SELECT array_agg(r) INTO v_revoke FROM (SELECT unnest(v_all) AS r EXCEPT SELECT unnest(v_parent_grant.types)) x;
IF v_revoke IS NOT NULL THEN
EXECUTE 'REVOKE '||array_to_string(v_revoke, ',')||' ON '||v_partition_name||' FROM '||v_parent_grant.grantee||' CASCADE';
END IF;
v_grantees := array_append(v_grantees, v_parent_grant.grantee::text);
END LOOP;
-- Revoke all privileges from roles that have none on the parent
IF v_grantees IS NOT NULL THEN
SELECT array_agg(r) INTO v_revoke FROM (
SELECT DISTINCT grantee::text AS r FROM information_schema.table_privileges WHERE table_schema ||'.'|| table_name = v_partition_name
EXCEPT
SELECT unnest(v_grantees)) x;
IF v_revoke IS NOT NULL THEN
EXECUTE 'REVOKE ALL ON '||v_partition_name||' FROM '||array_to_string(v_revoke, ',');
END IF;
END IF;
EXECUTE 'ALTER TABLE '||v_partition_name||' OWNER TO '||v_parent_owner;
IF v_inherit_fk THEN
PERFORM @extschema@.apply_foreign_keys(quote_ident(v_parent_schema)||'.'||quote_ident(v_parent_tablename), v_partition_name);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
-- Will only loop once and only if sub_partitioning is actually configured
-- This seemed easier than assigning a bunch of variables then doing an IF condition
FOR v_row IN
SELECT sub_parent
, sub_control
, sub_partition_type
, 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_use_run_maintenance
, sub_jobmon
FROM @extschema@.part_config_sub
WHERE sub_parent = p_parent_table
LOOP
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Subpartitioning '||v_partition_name);
END IF;
v_sql := format('SELECT @extschema@.create_parent(
p_parent_table := %L
, p_control := %L
, p_type := %L
, p_interval := %L
, p_constraint_cols := %L
, p_premake := %L
, p_use_run_maintenance := %L
, p_inherit_fk := %L
, p_jobmon := %L )'
, v_partition_name
, v_row.sub_control
, v_row.sub_partition_type
, v_row.sub_partition_interval
, v_row.sub_constraint_cols
, v_row.sub_premake
, v_row.sub_use_run_maintenance
, v_row.sub_inherit_fk
, v_row.sub_jobmon);
EXECUTE v_sql;
UPDATE @extschema@.part_config SET
retention_schema = v_row.sub_retention_schema
, retention_keep_table = v_row.sub_retention_keep_table
, retention_keep_index = v_row.sub_retention_keep_index
WHERE parent_table = v_partition_name;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END LOOP; -- end sub partitioning LOOP
v_partition_created := true;
END LOOP;
-- v_analyze is a local check if a new table is made.
-- p_analyze is a parameter to say whether to run the analyze at all. Used by create_parent() to avoid long exclusive lock or run_maintenence() to avoid long creation runs.
IF v_analyze AND p_analyze THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Analyzing partition set: '||p_parent_table);
END IF;
EXECUTE 'ANALYZE '||p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
IF v_partition_created = false THEN
v_step_id := add_step(v_job_id, 'No partitions created for partition set: '||p_parent_table);
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
PERFORM close_job(v_job_id);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_partition_created;
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 TABLE: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to create a child table in a time-based partition set
*/
CREATE OR REPLACE FUNCTION create_partition_time (p_parent_table text, p_partition_times timestamp[], p_analyze boolean DEFAULT true)
RETURNS boolean
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_all text[] := ARRAY['SELECT', 'INSERT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER'];
v_analyze boolean := FALSE;
v_control text;
v_grantees text[];
v_hasoids boolean;
v_inherit_fk boolean;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_old_search_path text;
v_parent_grant record;
v_parent_owner text;
v_parent_schema text;
v_parent_tablename text;
v_partition_created boolean := false;
v_partition_name text;
v_partition_suffix text;
v_parent_tablespace text;
v_partition_interval interval;
v_partition_timestamp_end timestamp;
v_partition_timestamp_start timestamp;
v_quarter text;
v_revoke text[];
v_row record;
v_sql text;
v_step_id bigint;
v_step_overflow_id bigint;
v_sub_timestamp_max timestamp;
v_sub_timestamp_min timestamp;
v_tablename text;
v_trunc_value text;
v_time timestamp;
v_type text;
v_unlogged char;
v_year text;
BEGIN
SELECT partition_type
, control
, partition_interval
, inherit_fk
, jobmon
, datetime_string
INTO v_type
, v_control
, v_partition_interval
, v_inherit_fk
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'time' OR partition_type = 'time-custom';
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
-- Determine if this table is a child of a subpartition parent. If so, get limits of what child tables can be created based on parent suffix
SELECT sub_min::timestamp, sub_max::timestamp INTO v_sub_timestamp_min, v_sub_timestamp_max FROM @extschema@.check_subpartition_limits(p_parent_table, 'time');
SELECT tableowner, schemaname, tablename, tablespace INTO v_parent_owner, v_parent_schema, v_parent_tablename, v_parent_tablespace FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN CREATE TABLE: '||p_parent_table);
END IF;
FOREACH v_time IN ARRAY p_partition_times LOOP
v_partition_timestamp_start := v_time;
BEGIN
v_partition_timestamp_end := v_time + v_partition_interval;
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_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_time||' skipped');
CONTINUE;
END;
-- Do not create the child table if it's outside the bounds of the top parent.
IF v_sub_timestamp_min IS NOT NULL THEN
IF v_time < v_sub_timestamp_min OR v_time > v_sub_timestamp_max THEN
CONTINUE;
END IF;
END IF;
-- This suffix generation code is in partition_data_time() as well
v_partition_suffix := to_char(v_time, 'YYYY');
IF v_partition_interval < '1 year' AND v_partition_interval <> '1 week' THEN
v_partition_suffix := v_partition_suffix ||'_'|| to_char(v_time, 'MM');
IF v_partition_interval < '1 month' AND v_partition_interval <> '1 week' THEN
v_partition_suffix := v_partition_suffix ||'_'|| to_char(v_time, 'DD');
IF v_partition_interval < '1 day' THEN
v_partition_suffix := v_partition_suffix || '_' || to_char(v_time, 'HH24MI');
IF v_partition_interval < '1 minute' THEN
v_partition_suffix := v_partition_suffix || to_char(v_time, 'SS');
END IF; -- end < minute IF
END IF; -- end < day IF
END IF; -- end < month IF
END IF; -- end < year IF
IF v_partition_interval = '1 week' THEN
v_partition_suffix := to_char(v_time, 'IYYY') || 'w' || to_char(v_time, 'IW');
END IF;
-- "Q" is ignored in to_timestamp, so handle special case
IF v_partition_interval = '3 months' AND v_type = 'time' THEN
v_year := to_char(v_time, 'YYYY');
v_quarter := to_char(v_time, 'Q');
v_partition_suffix := v_year || 'q' || v_quarter;
END IF;
v_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_partition_suffix, TRUE);
SELECT tablename INTO v_tablename FROM pg_catalog.pg_tables WHERE schemaname ||'.'|| tablename = v_partition_name;
IF v_tablename IS NOT NULL THEN
CONTINUE;
END IF;
-- Ensure analyze is run if a new partition is created. Otherwise if one isn't, will be false and analyze will be skipped
v_analyze := TRUE;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Creating new partition '||v_partition_name||' with interval from '||v_partition_timestamp_start||' to '||(v_partition_timestamp_end-'1sec'::interval));
END IF;
SELECT relpersistence INTO v_unlogged FROM pg_catalog.pg_class WHERE oid::regclass = p_parent_table::regclass;
v_sql := 'CREATE';
IF v_unlogged = 'u' THEN
v_sql := v_sql || ' UNLOGGED';
END IF;
v_sql := v_sql || ' TABLE '||v_partition_name||' (LIKE '||p_parent_table||' INCLUDING DEFAULTS INCLUDING CONSTRAINTS INCLUDING INDEXES INCLUDING STORAGE INCLUDING COMMENTS)';
SELECT relhasoids INTO v_hasoids FROM pg_catalog.pg_class WHERE oid::regclass = p_parent_table::regclass;
IF v_hasoids IS TRUE THEN
v_sql := v_sql || ' WITH (OIDS)';
END IF;
EXECUTE v_sql;
SELECT tablename INTO v_tablename FROM pg_catalog.pg_tables WHERE schemaname ||'.'|| tablename = v_partition_name;
IF v_parent_tablespace IS NOT NULL THEN
EXECUTE 'ALTER TABLE '||v_partition_name||' SET TABLESPACE '||v_parent_tablespace;
END IF;
EXECUTE 'ALTER TABLE '||v_partition_name||' ADD CONSTRAINT '||v_tablename||'_partition_check
CHECK ('||v_control||'>='||quote_literal(v_partition_timestamp_start)||' AND '||v_control||'<'||quote_literal(v_partition_timestamp_end)||')';
EXECUTE 'ALTER TABLE '||v_partition_name||' INHERIT '||p_parent_table;
-- If custom time, set extra config options.
IF v_type = 'time-custom' THEN
INSERT INTO @extschema@.custom_time_partitions (parent_table, child_table, partition_range)
VALUES ( p_parent_table, v_partition_name, tstzrange(v_partition_timestamp_start, v_partition_timestamp_end, '[)') );
END IF;
FOR v_parent_grant IN
SELECT array_agg(DISTINCT privilege_type::text ORDER BY privilege_type::text) AS types, grantee
FROM information_schema.table_privileges
WHERE table_schema ||'.'|| table_name = p_parent_table
GROUP BY grantee
LOOP
EXECUTE 'GRANT '||array_to_string(v_parent_grant.types, ',')||' ON '||v_partition_name||' TO '||v_parent_grant.grantee;
SELECT array_agg(r) INTO v_revoke FROM (SELECT unnest(v_all) AS r EXCEPT SELECT unnest(v_parent_grant.types)) x;
IF v_revoke IS NOT NULL THEN
EXECUTE 'REVOKE '||array_to_string(v_revoke, ',')||' ON '||v_partition_name||' FROM '||v_parent_grant.grantee||' CASCADE';
END IF;
v_grantees := array_append(v_grantees, v_parent_grant.grantee::text);
END LOOP;
-- Revoke all privileges from roles that have none on the parent
IF v_grantees IS NOT NULL THEN
SELECT array_agg(r) INTO v_revoke FROM (
SELECT DISTINCT grantee::text AS r FROM information_schema.table_privileges WHERE table_schema ||'.'|| table_name = v_partition_name
EXCEPT
SELECT unnest(v_grantees)) x;
IF v_revoke IS NOT NULL THEN
EXECUTE 'REVOKE ALL ON '||v_partition_name||' FROM '||array_to_string(v_revoke, ',');
END IF;
END IF;
EXECUTE 'ALTER TABLE '||v_partition_name||' OWNER TO '||v_parent_owner;
IF v_inherit_fk THEN
PERFORM @extschema@.apply_foreign_keys(quote_ident(v_parent_schema)||'.'||quote_ident(v_parent_tablename), v_partition_name);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
-- Will only loop once and only if sub_partitioning is actually configured
-- This seemed easier than assigning a bunch of variables then doing an IF condition
FOR v_row IN
SELECT sub_parent
, sub_control
, sub_partition_type
, 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_use_run_maintenance
, sub_jobmon
FROM @extschema@.part_config_sub
WHERE sub_parent = p_parent_table
LOOP
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Subpartitioning '||v_partition_name);
END IF;
v_sql := format('SELECT @extschema@.create_parent(
p_parent_table := %L
, p_control := %L
, p_type := %L
, p_interval := %L
, p_constraint_cols := %L
, p_premake := %L
, p_use_run_maintenance := %L
, p_inherit_fk := %L
, p_jobmon := %L )'
, v_partition_name
, v_row.sub_control
, v_row.sub_partition_type
, v_row.sub_partition_interval
, v_row.sub_constraint_cols
, v_row.sub_premake
, v_row.sub_use_run_maintenance
, v_row.sub_inherit_fk
, v_row.sub_jobmon);
EXECUTE v_sql;
UPDATE @extschema@.part_config SET
retention_schema = v_row.sub_retention_schema
, retention_keep_table = v_row.sub_retention_keep_table
, retention_keep_index = v_row.sub_retention_keep_index
WHERE parent_table = v_partition_name;
END LOOP; -- end sub partitioning LOOP
v_partition_created := true;
END LOOP;
-- v_analyze is a local check if a new table is made.
-- p_analyze is a parameter to say whether to run the analyze at all. Used by create_parent() to avoid long exclusive lock or run_maintenence() to avoid long creation runs.
IF v_analyze AND p_analyze THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Analyzing partition set: '||p_parent_table);
END IF;
EXECUTE 'ANALYZE '||p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
IF v_partition_created = false THEN
v_step_id := add_step(v_job_id, 'No partitions created for partition set: '||p_parent_table);
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
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;
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_partition_created;
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 TABLE: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Apply constraints managed by partman extension
*/
CREATE OR REPLACE FUNCTION apply_constraints(p_parent_table text, p_child_table text DEFAULT NULL, p_analyze boolean DEFAULT FALSE, p_debug boolean DEFAULT FALSE) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_child_table text;
v_child_tablename text;
v_col text;
v_constraint_cols text[];
v_constraint_col_type text;
v_constraint_name text;
v_datetime_string text;
v_existing_constraint_name text;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_last_partition text;
v_last_partition_id int;
v_last_partition_timestamp timestamp;
v_constraint_values record;
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval text;
v_partition_suffix text;
v_premake int;
v_sql text;
v_step_id bigint;
v_suffix_position int;
v_type text;
BEGIN
SELECT partition_type
, partition_interval
, premake
, datetime_string
, constraint_cols
, jobmon
INTO v_type
, v_partition_interval
, v_premake
, v_datetime_string
, v_constraint_cols
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table;
IF v_constraint_cols IS NULL THEN
IF p_debug THEN
RAISE NOTICE 'Given parent table (%) not set up for constraint management (constraint_cols is NULL)', p_parent_table;
END IF;
-- Returns silently to allow this function to be simply called by maintenance processes without having to check if config options are set.
RETURN;
END IF;
SELECT show_partitions INTO v_last_partition FROM @extschema@.show_partitions(p_parent_table, 'DESC') LIMIT 1;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN CREATE CONSTRAINT: '||p_parent_table);
END IF;
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
-- If p_child_table is null, figure out the partition that is the one right before the premake value backwards.
IF p_child_table IS NULL THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Automatically determining most recent child on which to apply constraints');
END IF;
v_suffix_position := (length(v_last_partition) - position('p_' in reverse(v_last_partition))) + 2;
IF v_type IN ('time', 'time-custom') THEN
v_last_partition_timestamp := to_timestamp(substring(v_last_partition from v_suffix_position), v_datetime_string);
v_partition_suffix := to_char(v_last_partition_timestamp - (v_partition_interval::interval * ((v_premake * 2)+1) ), v_datetime_string);
ELSIF v_type = 'id' THEN
v_last_partition_id := substring(v_last_partition from v_suffix_position)::int;
v_partition_suffix := (v_last_partition_id - (v_partition_interval::int * ((v_premake * 2)+1) ))::text;
END IF;
v_child_table := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_partition_suffix, TRUE);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Target child table: '||v_child_table);
END IF;
ELSE
v_child_table := p_child_table;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Checking if target child table exists');
END IF;
SELECT tablename INTO v_child_tablename FROM pg_catalog.pg_tables WHERE schemaname ||'.'|| tablename = v_child_table;
IF v_child_tablename IS NULL THEN
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'NOTICE', 'Target child table ('||v_child_table||') does not exist. Skipping constraint creation.');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
IF p_debug THEN
RAISE NOTICE 'Target child table (%) does not exist. Skipping constraint creation.', v_child_table;
END IF;
RETURN;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
FOREACH v_col IN ARRAY v_constraint_cols
LOOP
SELECT c.conname
INTO v_existing_constraint_name
FROM pg_catalog.pg_constraint c
JOIN pg_catalog.pg_attribute a ON c.conrelid = a.attrelid
WHERE conrelid = v_child_table::regclass
AND c.conname LIKE 'partmanconstr_%'
AND c.contype = 'c'
AND a.attname = v_col
AND ARRAY[a.attnum] <@ c.conkey
AND a.attisdropped = false;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Applying new constraint on column: '||v_col);
END IF;
IF v_existing_constraint_name IS NOT NULL THEN
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'NOTICE', 'Partman managed constraint already exists on this table ('||v_child_table||') and column ('||v_col||'). Skipping creation.');
END IF;
RAISE WARNING 'Partman managed constraint already exists on this table (%) and column (%). Skipping creation.', v_child_table, v_col ;
CONTINUE;
END IF;
-- Ensure column name gets put on end of constraint name to help avoid naming conflicts
v_constraint_name := @extschema@.check_name_length('partmanconstr_'||v_child_tablename, p_suffix := '_'||v_col);
EXECUTE 'SELECT min('||v_col||')::text AS min, max('||v_col||')::text AS max FROM '||v_child_table INTO v_constraint_values;
IF v_constraint_values IS NOT NULL THEN
v_sql := concat('ALTER TABLE ', v_child_table, ' ADD CONSTRAINT ', v_constraint_name
, ' CHECK (', v_col, ' >= ', quote_literal(v_constraint_values.min), ' AND '
, v_col, ' <= ', quote_literal(v_constraint_values.max), ')' );
IF p_debug THEN
RAISE NOTICE 'Constraint creation query: %', v_sql;
END IF;
EXECUTE v_sql;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'New constraint created: '||v_sql);
END IF;
ELSE
IF p_debug THEN
RAISE NOTICE 'Given column (%) contains all NULLs. No constraint created', v_col;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'NOTICE', 'Given column ('||v_col||') contains all NULLs. No constraint created');
END IF;
END IF;
END LOOP;
IF p_analyze THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Running analyze on partition set: '||p_parent_table);
END IF;
IF p_debug THEN
RAISE NOTICE 'Running analyze on partition set: %', p_parent_table;
END IF;
EXECUTE 'ANALYZE '||p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 CONSTRAINT: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Apply foreign keys that exist on the given parent to the given child table
*/
CREATE OR REPLACE FUNCTION apply_foreign_keys(p_parent_table text, p_child_table text, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_job_id bigint;
v_jobmon text;
v_jobmon_schema text;
v_old_search_path text;
v_ref_schema text;
v_ref_table text;
v_row record;
v_schemaname text;
v_sql text;
v_step_id bigint;
v_tablename text;
BEGIN
SELECT jobmon INTO v_jobmon FROM @extschema@.part_config WHERE parent_table = p_parent_table;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN APPLYING FOREIGN KEYS: '||p_parent_table);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Checking if target child table exists');
END IF;
SELECT schemaname, tablename INTO v_schemaname, v_tablename
FROM pg_catalog.pg_tables
WHERE schemaname||'.'||tablename = p_child_table;
IF v_tablename IS NULL THEN
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'CRITICAL', 'Target child table ('||v_child_table||') does not exist.');
PERFORM fail_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RAISE EXCEPTION 'Target child table (%.%) does not exist.', v_schemaname, v_tablename;
RETURN;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
FOR v_row IN
SELECT n.nspname||'.'||cl.relname AS ref_table
, '"'||string_agg(att.attname, '","')||'"' AS ref_column
, '"'||string_agg(att2.attname, '","')||'"' AS child_column
, keys.condeferred
, keys.condeferrable
, keys.confupdtype
, keys.confdeltype
, keys.confmatchtype
FROM
( SELECT unnest(con.conkey) as ref
, unnest(con.confkey) as child
, con.confrelid
, con.conrelid
, con.condeferred
, con.condeferrable
, con.confupdtype
, con.confdeltype
, con.confmatchtype
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
JOIN pg_catalog.pg_constraint con ON c.oid = con.conrelid
WHERE n.nspname ||'.'|| c.relname = p_parent_table
AND con.contype = 'f'
ORDER BY con.conkey
) keys
JOIN pg_catalog.pg_class cl ON cl.oid = keys.confrelid
JOIN pg_catalog.pg_namespace n ON cl.relnamespace = n.oid
JOIN pg_catalog.pg_attribute att ON att.attrelid = keys.confrelid AND att.attnum = keys.child
JOIN pg_catalog.pg_attribute att2 ON att2.attrelid = keys.conrelid AND att2.attnum = keys.ref
GROUP BY n.nspname, cl.relname, keys.condeferred, keys.condeferrable, keys.confupdtype, keys.confdeltype, keys.confmatchtype
LOOP
SELECT schemaname, tablename INTO v_ref_schema, v_ref_table FROM pg_tables WHERE schemaname||'.'||tablename = v_row.ref_table;
v_sql := format('ALTER TABLE %I.%I ADD FOREIGN KEY (%s) REFERENCES %I.%I (%s)',
v_schemaname, v_tablename, v_row.child_column, v_ref_schema, v_ref_table, v_row.ref_column);
CASE
WHEN v_row.confmatchtype = 'f' THEN
v_sql := v_sql || ' MATCH FULL ';
WHEN v_row.confmatchtype = 's' THEN
v_sql := v_sql || ' MATCH SIMPLE ';
WHEN v_row.confmatchtype = 'p' THEN
v_sql := v_sql || ' MATCH PARTIAL ';
END CASE;
CASE
WHEN v_row.confupdtype = 'a' THEN
v_sql := v_sql || ' ON UPDATE NO ACTION ';
WHEN v_row.confupdtype = 'r' THEN
v_sql := v_sql || ' ON UPDATE RESTRICT ';
WHEN v_row.confupdtype = 'c' THEN
v_sql := v_sql || ' ON UPDATE CASCADE ';
WHEN v_row.confupdtype = 'n' THEN
v_sql := v_sql || ' ON UPDATE SET NULL ';
WHEN v_row.confupdtype = 'd' THEN
v_sql := v_sql || ' ON UPDATE SET DEFAULT ';
END CASE;
CASE
WHEN v_row.confdeltype = 'a' THEN
v_sql := v_sql || ' ON DELETE NO ACTION ';
WHEN v_row.confdeltype = 'r' THEN
v_sql := v_sql || ' ON DELETE RESTRICT ';
WHEN v_row.confdeltype = 'c' THEN
v_sql := v_sql || ' ON DELETE CASCADE ';
WHEN v_row.confdeltype = 'n' THEN
v_sql := v_sql || ' ON DELETE SET NULL ';
WHEN v_row.confdeltype = 'd' THEN
v_sql := v_sql || ' ON DELETE SET DEFAULT ';
END CASE;
CASE
WHEN v_row.condeferrable = true AND v_row.condeferred = true THEN
v_sql := v_sql || ' DEFERRABLE INITIALLY DEFERRED ';
WHEN v_row.condeferrable = false AND v_row.condeferred = false THEN
v_sql := v_sql || ' NOT DEFERRABLE ';
WHEN v_row.condeferrable = true AND v_row.condeferred = false THEN
v_sql := v_sql || ' DEFERRABLE INITIALLY IMMEDIATE ';
END CASE;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Applying FK: '||v_sql);
END IF;
EXECUTE v_sql;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'FK applied');
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 APPLYING FOREIGN KEYS: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to monitor for data getting inserted into parent tables managed by extension
*/
CREATE OR REPLACE FUNCTION check_parent() RETURNS SETOF @extschema@.check_parent_table
LANGUAGE plpgsql STABLE SECURITY DEFINER
AS $$
DECLARE
v_count bigint = 0;
v_sql text;
v_tables record;
v_trouble @extschema@.check_parent_table%rowtype;
BEGIN
FOR v_tables IN
SELECT DISTINCT parent_table FROM @extschema@.part_config
LOOP
v_sql := 'SELECT count(1) AS n FROM ONLY '||v_tables.parent_table;
EXECUTE v_sql INTO v_count;
IF v_count > 0 THEN
v_trouble.parent_table := v_tables.parent_table;
v_trouble.count := v_count;
RETURN NEXT v_trouble;
END IF;
v_count := 0;
END LOOP;
RETURN;
END
$$;
/*
* Create a partition set that is a subpartition of an already existing partition set.
* Given the parent table of any current partition set, it will turn all existing children into parent tables of their own partition sets
* using the configuration options given as parameters to this function.
* Uses another config table that allows for turning all future child partitions into a new parent automatically.
* To avoid logical complications and contention issues, ALL subpartitions must be maintained using run_maintenance().
* This means the automatic, trigger based partition creation for serial partitioning will not work if it is a subpartition.
*/
CREATE OR REPLACE FUNCTION create_sub_parent(
p_top_parent text
, p_control text
, p_type text
, p_interval text
, p_constraint_cols text[] DEFAULT NULL
, p_premake int DEFAULT 4
, p_start_partition text DEFAULT NULL
, p_inherit_fk boolean DEFAULT true
, p_jobmon boolean DEFAULT true
, p_debug boolean DEFAULT false)
RETURNS boolean
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_last_partition text;
v_row record;
v_row_last_part record;
v_run_maint boolean;
v_sql text;
v_success boolean := false;
v_top_type text;
BEGIN
SELECT use_run_maintenance INTO v_run_maint FROM @extschema@.part_config WHERE parent_table = p_top_parent;
IF v_run_maint IS NULL THEN
RAISE EXCEPTION 'Cannot subpartition a table that is not managed by pg_partman already. Given top parent table not found in @extschema@.part_config: %', p_top_parent;
ELSIF v_run_maint = false THEN
RAISE EXCEPTION 'Any parent table that will be part of a sub-partitioned set (on any level) must have use_run_maintenance set to true in part_config table, even for serial partitioning. See documentation for more info.';
END IF;
FOR v_row IN
-- Loop through all current children to turn them into partitioned tables
SELECT show_partitions AS child_table FROM @extschema@.show_partitions(p_top_parent)
LOOP
-- Just call existing create_parent() function but add the given parameters to the part_config_sub table as well
v_sql := format('SELECT @extschema@.create_parent(
p_parent_table := %L
, p_control := %L
, p_type := %L
, p_interval := %L
, p_constraint_cols := %L
, p_premake := %L
, p_use_run_maintenance := %L
, p_start_partition := %L
, p_inherit_fk := %L
, p_jobmon := %L
, p_debug := %L )'
, v_row.child_table
, p_control
, p_type
, p_interval
, p_constraint_cols
, p_premake
, true
, p_start_partition
, p_inherit_fk
, p_jobmon
, p_debug);
EXECUTE v_sql;
END LOOP;
INSERT INTO @extschema@.part_config_sub (
sub_parent
, sub_control
, sub_partition_type
, sub_partition_interval
, sub_constraint_cols
, sub_premake
, sub_inherit_fk
, sub_use_run_maintenance
, sub_jobmon)
VALUES (
p_top_parent
, p_control
, p_type
, p_interval
, p_constraint_cols
, p_premake
, p_inherit_fk
, true
, p_jobmon);
v_success := true;
RETURN v_success;
END
$$;
/*
* Drop constraints managed by pg_partman
*/
CREATE OR REPLACE FUNCTION drop_constraints(p_parent_table text, p_child_table text, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_col text;
v_constraint_cols text[];
v_existing_constraint_name text;
v_exists boolean := FALSE;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_old_search_path text;
v_sql text;
v_step_id bigint;
BEGIN
SELECT constraint_cols
, jobmon
INTO v_constraint_cols
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table;
IF v_constraint_cols IS NULL THEN
RAISE EXCEPTION 'Given parent table (%) not set up for constraint management (constraint_cols is NULL)', p_parent_table;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN DROP CONSTRAINT: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Entering constraint drop loop');
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
FOREACH v_col IN ARRAY v_constraint_cols
LOOP
SELECT c.conname
INTO v_existing_constraint_name
FROM pg_catalog.pg_constraint c
JOIN pg_catalog.pg_attribute a ON c.conrelid = a.attrelid
WHERE conrelid = p_child_table::regclass
AND c.conname LIKE 'partmanconstr_%'
AND c.contype = 'c'
AND a.attname = v_col
AND ARRAY[a.attnum] <@ c.conkey
AND a.attisdropped = false;
IF v_existing_constraint_name IS NOT NULL THEN
v_exists := TRUE;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Dropping constraint on column: '||v_col);
END IF;
v_sql := 'ALTER TABLE '||p_child_table||' DROP CONSTRAINT '||v_existing_constraint_name;
IF p_debug THEN
RAISE NOTICE 'Constraint drop query: %', v_sql;
END IF;
EXECUTE v_sql;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Drop constraint query: '||v_sql);
END IF;
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL AND v_exists IS FALSE THEN
v_step_id := add_step(v_job_id, 'No constraints found to drop on child table: '||p_child_table);
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 DROP CONSTRAINT: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to drop child tables from an id-based partition set.
* Options to move table to different schema, drop only indexes or actually drop the table from the database.
*/
CREATE OR REPLACE FUNCTION drop_partition_id(p_parent_table text, p_retention bigint DEFAULT NULL, p_keep_table boolean DEFAULT NULL, p_keep_index boolean DEFAULT NULL, p_retention_schema text DEFAULT NULL) RETURNS int
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_child_table text;
v_control text;
v_drop_count int := 0;
v_id_position int;
v_index record;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_max bigint;
v_old_search_path text;
v_partition_interval bigint;
v_partition_id bigint;
v_retention bigint;
v_retention_keep_index boolean;
v_retention_keep_table boolean;
v_retention_schema text;
v_row_max_id record;
v_step_id bigint;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman drop_partition_id'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'drop_partition_id already running.';
RETURN 0;
END IF;
-- Allow override of configuration options
IF p_retention IS NULL THEN
SELECT
partition_interval::bigint
, control
, retention::bigint
, retention_keep_table
, retention_keep_index
, retention_schema
, jobmon
INTO
v_partition_interval
, v_control
, v_retention
, v_retention_keep_table
, v_retention_keep_index
, v_retention_schema
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'id'
AND retention IS NOT NULL;
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table with a retention period not found: %', p_parent_table;
END IF;
ELSE
SELECT
partition_interval::bigint
, control
, retention_keep_table
, retention_keep_index
, retention_schema
, jobmon
INTO
v_partition_interval
, v_control
, v_retention_keep_table
, v_retention_keep_index
, v_retention_schema
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'id';
v_retention := p_retention;
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table not found: %', p_parent_table;
END IF;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF p_keep_table IS NOT NULL THEN
v_retention_keep_table = p_keep_table;
END IF;
IF p_keep_index IS NOT NULL THEN
v_retention_keep_index = p_keep_index;
END IF;
IF p_retention_schema IS NOT NULL THEN
v_retention_schema = p_retention_schema;
END IF;
-- Loop through child tables starting from highest to get current max value in partition set
-- Avoids doing a scan on entire partition set and/or getting any values accidentally in parent.
FOR v_row_max_id IN
SELECT show_partitions FROM @extschema@.show_partitions(p_parent_table, 'DESC')
LOOP
EXECUTE 'SELECT max('||v_control||') FROM '||v_row_max_id.show_partitions INTO v_max;
IF v_max IS NOT NULL THEN
EXIT;
END IF;
END LOOP;
-- Loop through child tables of the given parent
FOR v_child_table IN
SELECT n.nspname||'.'||c.relname FROM pg_inherits i join pg_class c ON i.inhrelid = c.oid join pg_namespace n ON c.relnamespace = n.oid WHERE i.inhparent::regclass = p_parent_table::regclass ORDER BY i.inhrelid ASC
LOOP
v_id_position := (length(v_child_table) - position('p_' in reverse(v_child_table))) + 2;
v_partition_id := substring(v_child_table from v_id_position)::bigint;
-- Add one interval since partition names contain the start of the constraint period
IF v_retention <= (v_max - (v_partition_id + v_partition_interval)) THEN
-- Only create a jobmon entry if there's actual retention work done
IF v_jobmon_schema IS NOT NULL AND v_job_id IS NULL THEN
v_job_id := add_job('PARTMAN DROP ID PARTITION: '|| p_parent_table);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Uninherit table '||v_child_table||' from '||p_parent_table);
END IF;
EXECUTE 'ALTER TABLE '||v_child_table||' NO INHERIT ' || p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
IF v_retention_schema IS NULL THEN
IF v_retention_keep_table = false THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Drop table '||v_child_table);
END IF;
EXECUTE 'DROP TABLE '||v_child_table||' CASCADE';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
ELSIF v_retention_keep_index = false THEN
FOR v_index IN
SELECT i.indexrelid::regclass AS name
, c.conname
FROM pg_catalog.pg_index i
LEFT JOIN pg_catalog.pg_constraint c ON i.indexrelid = c.conindid
WHERE i.indrelid = v_child_table::regclass
LOOP
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Drop index '||v_index.name||' from '||v_child_table);
END IF;
IF v_index.conname IS NOT NULL THEN
EXECUTE 'ALTER TABLE '||v_child_table||' DROP CONSTRAINT '||v_index.conname;
ELSE
EXECUTE 'DROP INDEX '||v_index.name;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END LOOP;
END IF;
ELSE -- Move to new schema
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Moving table '||v_child_table||' to schema '||v_retention_schema);
END IF;
EXECUTE 'ALTER TABLE '||v_child_table||' SET SCHEMA '||v_retention_schema;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF; -- End retention schema if
-- If child table is a subpartition, remove it from part_config & part_config_sub (should cascade due to FK)
DELETE FROM @extschema@.part_config WHERE parent_table = v_child_table;
v_drop_count := v_drop_count + 1;
END IF; -- End retention check IF
END LOOP; -- End child table loop
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Finished partition drop maintenance');
PERFORM update_step(v_step_id, 'OK', v_drop_count||' partitions dropped.');
PERFORM close_job(v_job_id);
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_drop_count;
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 DROP ID PARTITION: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to drop child tables from a time-based partition set.
* Options to move table to different schema, drop only indexes or actually drop the table from the database.
*/
CREATE OR REPLACE FUNCTION drop_partition_time(p_parent_table text, p_retention interval DEFAULT NULL, p_keep_table boolean DEFAULT NULL, p_keep_index boolean DEFAULT NULL, p_retention_schema text DEFAULT NULL) RETURNS int
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_child_table text;
v_datetime_string text;
v_drop_count int := 0;
v_index record;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_old_search_path text;
v_partition_interval interval;
v_partition_timestamp timestamp;
v_quarter text;
v_retention interval;
v_retention_keep_index boolean;
v_retention_keep_table boolean;
v_retention_schema text;
v_step_id bigint;
v_time_position int;
v_type text;
v_year text;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman drop_partition_time'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'drop_partition_time already running.';
RETURN 0;
END IF;
-- Allow override of configuration options
IF p_retention IS NULL THEN
SELECT
partition_type
, partition_interval::interval
, retention::interval
, retention_keep_table
, retention_keep_index
, datetime_string
, retention_schema
, jobmon
INTO
v_type
, v_partition_interval
, v_retention
, v_retention_keep_table
, v_retention_keep_index
, v_datetime_string
, v_retention_schema
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom')
AND retention IS NOT NULL;
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table with a retention period not found: %', p_parent_table;
END IF;
ELSE
SELECT
partition_type
, partition_interval::interval
, retention_keep_table
, retention_keep_index
, datetime_string
, retention_schema
, jobmon
INTO
v_type
, v_partition_interval
, v_retention_keep_table
, v_retention_keep_index
, v_datetime_string
, v_retention_schema
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
v_retention := p_retention;
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table not found: %', p_parent_table;
END IF;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF p_keep_table IS NOT NULL THEN
v_retention_keep_table = p_keep_table;
END IF;
IF p_keep_index IS NOT NULL THEN
v_retention_keep_index = p_keep_index;
END IF;
IF p_retention_schema IS NOT NULL THEN
v_retention_schema = p_retention_schema;
END IF;
-- Loop through child tables of the given parent
FOR v_child_table IN
SELECT n.nspname||'.'||c.relname FROM pg_inherits i join pg_class c ON i.inhrelid = c.oid join pg_namespace n ON c.relnamespace = n.oid WHERE i.inhparent::regclass = p_parent_table::regclass ORDER BY i.inhrelid ASC
LOOP
-- pull out datetime portion of partition's tablename to make the next one
v_time_position := (length(v_child_table) - position('p_' in reverse(v_child_table))) + 2;
IF v_partition_interval <> '3 months' OR (v_partition_interval = '3 months' AND v_type = 'time-custom') THEN
v_partition_timestamp := to_timestamp(substring(v_child_table from v_time_position), v_datetime_string);
ELSE
-- to_timestamp doesn't recognize 'Q' date string formater. Handle it
v_year := split_part(substring(v_child_table from v_time_position), 'q', 1);
v_quarter := split_part(substring(v_child_table from v_time_position), 'q', 2);
CASE
WHEN v_quarter = '1' THEN
v_partition_timestamp := to_timestamp(v_year || '-01-01', 'YYYY-MM-DD');
WHEN v_quarter = '2' THEN
v_partition_timestamp := to_timestamp(v_year || '-04-01', 'YYYY-MM-DD');
WHEN v_quarter = '3' THEN
v_partition_timestamp := to_timestamp(v_year || '-07-01', 'YYYY-MM-DD');
WHEN v_quarter = '4' THEN
v_partition_timestamp := to_timestamp(v_year || '-10-01', 'YYYY-MM-DD');
END CASE;
END IF;
-- Add one interval since partition names contain the start of the constraint period
IF v_retention < (CURRENT_TIMESTAMP - (v_partition_timestamp + v_partition_interval)) THEN
-- Only create a jobmon entry if there's actual retention work done
IF v_jobmon_schema IS NOT NULL AND v_job_id IS NULL THEN
v_job_id := add_job('PARTMAN DROP TIME PARTITION: '|| p_parent_table);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Uninherit table '||v_child_table||' from '||p_parent_table);
END IF;
EXECUTE 'ALTER TABLE '||v_child_table||' NO INHERIT ' || p_parent_table;
IF v_type = 'time-custom' THEN
DELETE FROM @extschema@.custom_time_partitions WHERE parent_table = p_parent_table AND child_table = v_child_table;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
IF v_retention_schema IS NULL THEN
IF v_retention_keep_table = false THEN
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Drop table '||v_child_table);
END IF;
EXECUTE 'DROP TABLE '||v_child_table||' CASCADE';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
ELSIF v_retention_keep_index = false THEN
FOR v_index IN
SELECT i.indexrelid::regclass AS name
, c.conname
FROM pg_catalog.pg_index i
LEFT JOIN pg_catalog.pg_constraint c ON i.indexrelid = c.conindid
WHERE i.indrelid = v_child_table::regclass
LOOP
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Drop index '||v_index.name||' from '||v_child_table);
END IF;
IF v_index.conname IS NOT NULL THEN
EXECUTE 'ALTER TABLE '||v_child_table||' DROP CONSTRAINT '||v_index.conname;
ELSE
EXECUTE 'DROP INDEX '||v_index.name;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END LOOP;
END IF;
ELSE -- Move to new schema
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Moving table '||v_child_table||' to schema '||v_retention_schema);
END IF;
EXECUTE 'ALTER TABLE '||v_child_table||' SET SCHEMA '||v_retention_schema;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF; -- End retention schema if
-- If child table is a subpartition, remove it from part_config & part_config_sub (should cascade due to FK)
DELETE FROM @extschema@.part_config WHERE parent_table = v_child_table;
v_drop_count := v_drop_count + 1;
END IF; -- End retention check IF
END LOOP; -- End child table loop
IF v_jobmon_schema IS NOT NULL THEN
IF v_job_id IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Finished partition drop maintenance');
PERFORM update_step(v_step_id, 'OK', v_drop_count||' partitions dropped.');
PERFORM close_job(v_job_id);
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_drop_count;
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 DROP TIME PARTITION: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Populate the child table(s) of an id-based partition set with old data from the original parent
*/
CREATE OR REPLACE FUNCTION partition_data_id(p_parent_table text, p_batch_count int DEFAULT 1, p_batch_interval int DEFAULT NULL, p_lock_wait numeric DEFAULT 0, p_order text DEFAULT 'ASC') RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_control text;
v_current_partition_name text;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_max_partition_id bigint;
v_min_partition_id bigint;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval bigint;
v_partition_id bigint[];
v_rowcount bigint;
v_sql text;
v_start_control bigint;
v_total_rows bigint := 0;
BEGIN
SELECT partition_interval::bigint
, control
INTO v_partition_interval
, v_control
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'id';
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF p_batch_interval IS NULL OR p_batch_interval > v_partition_interval THEN
p_batch_interval := v_partition_interval;
END IF;
FOR i IN 1..p_batch_count LOOP
IF p_order = 'ASC' THEN
EXECUTE 'SELECT min('||v_control||') FROM ONLY '||p_parent_table INTO v_start_control;
IF v_start_control IS NULL THEN
EXIT;
END IF;
v_min_partition_id = v_start_control - (v_start_control % v_partition_interval);
v_partition_id := ARRAY[v_min_partition_id];
-- Check if custom batch interval overflows current partition maximum
IF (v_start_control + p_batch_interval) >= (v_min_partition_id + v_partition_interval) THEN
v_max_partition_id := v_min_partition_id + v_partition_interval;
ELSE
v_max_partition_id := v_start_control + p_batch_interval;
END IF;
ELSIF p_order = 'DESC' THEN
EXECUTE 'SELECT max('||v_control||') FROM ONLY '||p_parent_table INTO v_start_control;
IF v_start_control IS NULL THEN
EXIT;
END IF;
v_min_partition_id = v_start_control - (v_start_control % v_partition_interval);
-- Must be greater than max value still in parent table since query below grabs < max
v_max_partition_id := v_min_partition_id + v_partition_interval;
v_partition_id := ARRAY[v_min_partition_id];
-- Make sure minimum doesn't underflow current partition minimum
IF (v_start_control - p_batch_interval) >= v_min_partition_id THEN
v_min_partition_id = v_start_control - p_batch_interval;
END IF;
ELSE
RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
END IF;
-- do some locking with timeout, if required
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
v_sql := 'SELECT * FROM ONLY ' || p_parent_table ||
' WHERE '||v_control||' >= '||quote_literal(v_min_partition_id)||
' AND '||v_control||' < '||quote_literal(v_max_partition_id)
||' FOR UPDATE NOWAIT';
EXECUTE v_sql;
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RETURN -1;
END IF;
END IF;
PERFORM @extschema@.create_partition_id(p_parent_table, v_partition_id);
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_catalog.pg_tables WHERE schemaname||'.'||tablename = p_parent_table;
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_min_partition_id::text, TRUE);
EXECUTE 'WITH partition_data AS (
DELETE FROM ONLY '||p_parent_table||' WHERE '||v_control||' >= '||v_min_partition_id||
' AND '||v_control||' < '||v_max_partition_id||' RETURNING *)
INSERT INTO '||v_current_partition_name||' SELECT * FROM partition_data';
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total_rows := v_total_rows + v_rowcount;
IF v_rowcount = 0 THEN
EXIT;
END IF;
END LOOP;
PERFORM @extschema@.create_function_id(p_parent_table);
RETURN v_total_rows;
END
$$;
/*
* Populate the child table(s) of a time-based partition set with old data from the original parent
*/
CREATE OR REPLACE FUNCTION partition_data_time(p_parent_table text, p_batch_count int DEFAULT 1, p_batch_interval interval DEFAULT NULL, p_lock_wait numeric DEFAULT 0, p_order text DEFAULT 'ASC') RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_control text;
v_datetime_string text;
v_current_partition_name text;
v_max_partition_timestamp timestamp;
v_last_partition text;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_min_partition_timestamp timestamp;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval interval;
v_partition_suffix text;
v_partition_timestamp timestamp[];
v_quarter text;
v_rowcount bigint;
v_sql text;
v_start_control timestamp;
v_time_position int;
v_total_rows bigint := 0;
v_type text;
v_year text;
BEGIN
SELECT partition_type
, partition_interval::interval
, control
, datetime_string
INTO v_type
, v_partition_interval
, v_control
, v_datetime_string
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF p_batch_interval IS NULL OR p_batch_interval > v_partition_interval THEN
p_batch_interval := v_partition_interval;
END IF;
SELECT show_partitions INTO v_last_partition FROM @extschema@.show_partitions(p_parent_table, 'DESC') LIMIT 1;
FOR i IN 1..p_batch_count LOOP
IF p_order = 'ASC' THEN
EXECUTE 'SELECT min('||v_control||') FROM ONLY '||p_parent_table INTO v_start_control;
ELSIF p_order = 'DESC' THEN
EXECUTE 'SELECT max('||v_control||') FROM ONLY '||p_parent_table INTO v_start_control;
ELSE
RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
END IF;
IF v_start_control IS NULL THEN
EXIT;
END IF;
IF v_type = 'time' THEN
CASE
WHEN v_partition_interval = '15 mins' THEN
v_min_partition_timestamp := date_trunc('hour', v_start_control) +
'15min'::interval * floor(date_part('minute', v_start_control) / 15.0);
WHEN v_partition_interval = '30 mins' THEN
v_min_partition_timestamp := date_trunc('hour', v_start_control) +
'30min'::interval * floor(date_part('minute', v_start_control) / 30.0);
WHEN v_partition_interval = '1 hour' THEN
v_min_partition_timestamp := date_trunc('hour', v_start_control);
WHEN v_partition_interval = '1 day' THEN
v_min_partition_timestamp := date_trunc('day', v_start_control);
WHEN v_partition_interval = '1 week' THEN
v_min_partition_timestamp := date_trunc('week', v_start_control);
WHEN v_partition_interval = '1 month' THEN
v_min_partition_timestamp := date_trunc('month', v_start_control);
WHEN v_partition_interval = '3 months' THEN
v_min_partition_timestamp := date_trunc('quarter', v_start_control);
WHEN v_partition_interval = '1 year' THEN
v_min_partition_timestamp := date_trunc('year', v_start_control);
END CASE;
ELSIF v_type = 'time-custom' THEN
-- Keep going backwards, checking if the time interval encompases the current v_start_control value
v_time_position := (length(v_last_partition) - position('p_' in reverse(v_last_partition))) + 2;
v_min_partition_timestamp := to_timestamp(substring(v_last_partition from v_time_position), v_datetime_string);
v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
LOOP
IF v_start_control >= v_min_partition_timestamp AND v_start_control < v_max_partition_timestamp THEN
EXIT;
ELSE
v_max_partition_timestamp := v_min_partition_timestamp;
BEGIN
v_min_partition_timestamp := v_min_partition_timestamp - v_partition_interval;
EXCEPTION WHEN datetime_field_overflow THEN
RAISE EXCEPTION 'Attempted partition time interval is outside PostgreSQL''s supported time range.
Unable to create partition with interval before timestamp % ', v_min_partition_interval;
END;
END IF;
END LOOP;
END IF;
v_partition_timestamp := ARRAY[v_min_partition_timestamp];
IF p_order = 'ASC' THEN
IF (v_start_control + p_batch_interval) >= (v_min_partition_timestamp + v_partition_interval) THEN
v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
ELSE
v_max_partition_timestamp := v_start_control + p_batch_interval;
END IF;
ELSIF p_order = 'DESC' THEN
-- Must be greater than max value still in parent table since query below grabs < max
v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
-- Make sure minimum doesn't underflow current partition minimum
IF (v_start_control - p_batch_interval) >= v_min_partition_timestamp THEN
v_min_partition_timestamp = v_start_control - p_batch_interval;
END IF;
ELSE
RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
END IF;
-- do some locking with timeout, if required
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
v_sql := 'SELECT * FROM ONLY ' || p_parent_table ||
' WHERE '||v_control||' >= '||quote_literal(v_min_partition_timestamp)||
' AND '||v_control||' < '||quote_literal(v_max_partition_timestamp)
||' FOR UPDATE NOWAIT';
EXECUTE v_sql;
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RETURN -1;
END IF;
END IF;
PERFORM @extschema@.create_partition_time(p_parent_table, v_partition_timestamp);
-- This suffix generation code is in create_partition_time() as well
v_partition_suffix := to_char(v_min_partition_timestamp, 'YYYY');
IF v_partition_interval < '1 year' AND v_partition_interval <> '1 week' THEN
v_partition_suffix := v_partition_suffix ||'_'|| to_char(v_min_partition_timestamp, 'MM');
IF v_partition_interval < '1 month' AND v_partition_interval <> '1 week' THEN
v_partition_suffix := v_partition_suffix ||'_'|| to_char(v_min_partition_timestamp, 'DD');
IF v_partition_interval < '1 day' THEN
v_partition_suffix := v_partition_suffix || '_' || to_char(v_min_partition_timestamp, 'HH24MI');
IF v_partition_interval < '1 minute' THEN
v_partition_suffix := v_partition_suffix || to_char(v_min_partition_timestamp, 'SS');
END IF; -- end < minute IF
END IF; -- end < day IF
END IF; -- end < month IF
END IF; -- end < year IF
IF v_partition_interval = '1 week' THEN
v_partition_suffix := to_char(v_min_partition_timestamp, 'IYYY') || 'w' || to_char(v_min_partition_timestamp, 'IW');
END IF;
-- "Q" is ignored in to_timestamp, so handle special case
IF v_partition_interval = '3 months' AND (v_type = 'time') THEN
v_year := to_char(v_min_partition_timestamp, 'YYYY');
v_quarter := to_char(v_min_partition_timestamp, 'Q');
v_partition_suffix := v_year || 'q' || v_quarter;
END IF;
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_catalog.pg_tables WHERE schemaname||'.'||tablename = p_parent_table;
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, v_partition_suffix, TRUE);
EXECUTE 'WITH partition_data AS (
DELETE FROM ONLY '||p_parent_table||' WHERE '||v_control||' >= '||quote_literal(v_min_partition_timestamp)||
' AND '||v_control||' < '||quote_literal(v_max_partition_timestamp)||' RETURNING *)
INSERT INTO '||v_current_partition_name||' SELECT * FROM partition_data';
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total_rows := v_total_rows + v_rowcount;
IF v_rowcount = 0 THEN
EXIT;
END IF;
END LOOP;
PERFORM @extschema@.create_function_time(p_parent_table);
RETURN v_total_rows;
END
$$;
/*
* Function to re-apply ownership & privileges on all child tables in a partition set using parent table as reference
*/
CREATE OR REPLACE FUNCTION reapply_privileges(p_parent_table text) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_all text[] := ARRAY['SELECT', 'INSERT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER'];
v_child_owner text;
v_child_table text;
v_child_grant record;
v_grant text;
v_grantees text[];
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_match boolean;
v_old_search_path text;
v_parent_owner text;
v_owner_sql text;
v_revoke text[];
v_parent_grant record;
v_sql text;
v_step_id bigint;
BEGIN
SELECT jobmon INTO v_jobmon FROM @extschema@.part_config WHERE parent_table = p_parent_table;
IF v_jobmon IS NULL THEN
RAISE EXCEPTION 'Given table is not managed by this extention: %', p_parent_table;
END IF;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN RE-APPLYING PRIVILEGES TO ALL CHILD TABLES OF: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Setting new child table privileges');
END IF;
SELECT tableowner INTO v_parent_owner FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
FOR v_child_table IN
SELECT n.nspname||'.'||c.relname FROM pg_inherits i join pg_class c ON i.inhrelid = c.oid join pg_namespace n ON c.relnamespace = n.oid WHERE i.inhparent::regclass = p_parent_table::regclass ORDER BY i.inhrelid ASC
LOOP
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'PENDING', 'Currently on child partition in ascending order: '||v_child_table);
END IF;
v_grantees := NULL;
FOR v_parent_grant IN
SELECT array_agg(DISTINCT privilege_type::text ORDER BY privilege_type::text) AS types, grantee
FROM information_schema.table_privileges
WHERE table_schema ||'.'|| table_name = p_parent_table
GROUP BY grantee
LOOP
-- Compare parent & child grants. Don't re-apply if it already exists
v_match := false;
FOR v_child_grant IN
SELECT array_agg(DISTINCT privilege_type::text ORDER BY privilege_type::text) AS types, grantee
FROM information_schema.table_privileges
WHERE table_schema ||'.'|| table_name = v_child_table
GROUP BY grantee
LOOP
IF v_parent_grant.types = v_child_grant.types AND v_parent_grant.grantee = v_child_grant.grantee THEN
v_match := true;
END IF;
END LOOP;
IF v_match = false THEN
EXECUTE 'GRANT '||array_to_string(v_parent_grant.types, ',')||' ON '||v_child_table||' TO '||v_parent_grant.grantee;
SELECT array_agg(r) INTO v_revoke FROM (SELECT unnest(v_all) AS r EXCEPT SELECT unnest(v_parent_grant.types)) x;
IF v_revoke IS NOT NULL THEN
EXECUTE 'REVOKE '||array_to_string(v_revoke, ',')||' ON '||v_child_table||' FROM '||v_parent_grant.grantee||' CASCADE';
END IF;
END IF;
v_grantees := array_append(v_grantees, v_parent_grant.grantee::text);
END LOOP;
-- Revoke all privileges from roles that have none on the parent
IF v_grantees IS NOT NULL THEN
SELECT array_agg(r) INTO v_revoke FROM (
SELECT DISTINCT grantee::text AS r FROM information_schema.table_privileges WHERE table_schema ||'.'|| table_name = v_child_table
EXCEPT
SELECT unnest(v_grantees)) x;
IF v_revoke IS NOT NULL THEN
EXECUTE 'REVOKE ALL ON '||v_child_table||' FROM '||array_to_string(v_revoke, ',');
END IF;
END IF;
SELECT tableowner INTO v_child_owner FROM pg_tables WHERE schemaname ||'.'|| tablename = v_child_table;
IF v_parent_owner <> v_child_owner THEN
EXECUTE 'ALTER TABLE '||v_child_table||' OWNER TO '||v_parent_owner;
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
PERFORM close_job(v_job_id);
END IF;
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 RE-APPLYING PRIVILEGES TO ALL CHILD TABLES OF: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to manage pre-creation of the next partitions in a set.
* Also manages dropping old partitions if the retention option is set.
* If p_parent_table is passed, will only run run_maintenance() on that one table (no matter what the configuration table may have set for it)
* Otherwise, will run on all tables in the config table with p_run_maintenance() set to true.
* For large partition sets, running analyze can cause maintenance to take longer than expected. Can set p_analyze to false to avoid a forced analyze run.
* Be aware that constraint exclusion may not work properly until an analyze on the partition set is run.
*/
CREATE OR REPLACE FUNCTION run_maintenance(p_parent_table text DEFAULT NULL, p_analyze boolean DEFAULT true, p_jobmon boolean DEFAULT true) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_create_count int := 0;
v_current_partition text;
v_current_partition_id bigint;
v_current_partition_timestamp timestamp;
v_datetime_string text;
v_drop_count int := 0;
v_id_position int;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_last_partition text;
v_last_partition_created boolean;
v_last_partition_id bigint;
v_last_partition_timestamp timestamp;
v_next_partition_id bigint;
v_next_partition_timestamp timestamp;
v_old_search_path text;
v_premade_count int;
v_quarter text;
v_row record;
v_row_max_id record;
v_row_sub record;
v_step_id bigint;
v_step_overflow_id bigint;
v_step_serial_id bigint;
v_sub_id_max bigint;
v_sub_id_min bigint;
v_sub_parent text;
v_sub_timestamp_max timestamp;
v_sub_timestamp_min timestamp;
v_tablename text;
v_tables_list_sql text;
v_time_position int;
v_year text;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman run_maintenance'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'Partman maintenance already running.';
RETURN;
END IF;
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' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN RUN MAINTENANCE');
v_step_id := add_step(v_job_id, 'Running maintenance loop');
END IF;
v_tables_list_sql := 'SELECT parent_table
, partition_type
, partition_interval
, control
, premake
, datetime_string
, undo_in_progress
FROM @extschema@.part_config';
IF p_parent_table IS NULL THEN
v_tables_list_sql := v_tables_list_sql || ' WHERE use_run_maintenance = true';
ELSE
v_tables_list_sql := v_tables_list_sql || format(' WHERE parent_table = %L', p_parent_table);
END IF;
FOR v_row IN EXECUTE v_tables_list_sql
LOOP
CONTINUE WHEN v_row.undo_in_progress;
SELECT show_partitions INTO v_last_partition FROM @extschema@.show_partitions(v_row.parent_table, 'DESC') LIMIT 1;
IF v_row.partition_type = 'time' OR v_row.partition_type = 'time-custom' THEN
IF v_row.partition_type = 'time' THEN
CASE
WHEN v_row.partition_interval::interval = '15 mins' THEN
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP) +
'15min'::interval * floor(date_part('minute', CURRENT_TIMESTAMP) / 15.0);
WHEN v_row.partition_interval::interval = '30 mins' THEN
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP) +
'30min'::interval * floor(date_part('minute', CURRENT_TIMESTAMP) / 30.0);
WHEN v_row.partition_interval::interval = '1 hour' THEN
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP);
WHEN v_row.partition_interval::interval = '1 day' THEN
v_current_partition_timestamp := date_trunc('day', CURRENT_TIMESTAMP);
WHEN v_row.partition_interval::interval = '1 week' THEN
v_current_partition_timestamp := date_trunc('week', CURRENT_TIMESTAMP);
WHEN v_row.partition_interval::interval = '1 month' THEN
v_current_partition_timestamp := date_trunc('month', CURRENT_TIMESTAMP);
WHEN v_row.partition_interval::interval = '3 months' THEN
v_current_partition_timestamp := date_trunc('quarter', CURRENT_TIMESTAMP);
WHEN v_row.partition_interval::interval = '1 year' THEN
v_current_partition_timestamp := date_trunc('year', CURRENT_TIMESTAMP);
END CASE;
ELSIF v_row.partition_type = 'time-custom' THEN
SELECT child_table INTO v_current_partition FROM @extschema@.custom_time_partitions
WHERE parent_table = v_row.parent_table AND partition_range @> CURRENT_TIMESTAMP;
IF v_current_partition IS NULL THEN
RAISE EXCEPTION 'Current time partition missing from custom_time_partitions config table for table % and timestamp %',
CURRENT_TIMESTAMP, v_row.parent_table;
END IF;
v_time_position := (length(v_current_partition) - position('p_' in reverse(v_current_partition))) + 2;
v_current_partition_timestamp := to_timestamp(substring(v_current_partition from v_time_position), v_row.datetime_string);
END IF;
-- Determine if this table is a child of a subpartition parent. If so, get limits of what child tables can be created based on parent suffix
SELECT sub_min::timestamp, sub_max::timestamp INTO v_sub_timestamp_min, v_sub_timestamp_max FROM @extschema@.check_subpartition_limits(v_row.parent_table, 'time');
-- No need to run maintenance if it's outside the bounds of the top parent.
IF v_sub_timestamp_min IS NOT NULL THEN
IF v_current_partition_timestamp < v_sub_timestamp_min OR v_current_partition_timestamp > v_sub_timestamp_max THEN
CONTINUE;
END IF;
END IF;
v_time_position := (length(v_last_partition) - position('p_' in reverse(v_last_partition))) + 2;
IF v_row.partition_interval::interval <> '3 months' OR (v_row.partition_interval::interval = '3 months' AND v_row.partition_type = 'time-custom') THEN
v_last_partition_timestamp := to_timestamp(substring(v_last_partition from v_time_position), v_row.datetime_string);
ELSE
-- to_timestamp doesn't recognize 'Q' date string formater. Handle it
v_year := split_part(substring(v_last_partition from v_time_position), 'q', 1);
v_quarter := split_part(substring(v_last_partition from v_time_position), 'q', 2);
CASE
WHEN v_quarter = '1' THEN
v_last_partition_timestamp := to_timestamp(v_year || '-01-01', 'YYYY-MM-DD');
WHEN v_quarter = '2' THEN
v_last_partition_timestamp := to_timestamp(v_year || '-04-01', 'YYYY-MM-DD');
WHEN v_quarter = '3' THEN
v_last_partition_timestamp := to_timestamp(v_year || '-07-01', 'YYYY-MM-DD');
WHEN v_quarter = '4' THEN
v_last_partition_timestamp := to_timestamp(v_year || '-10-01', 'YYYY-MM-DD');
END CASE;
END IF;
-- Check and see how many premade partitions there are.
v_premade_count = round(EXTRACT('epoch' FROM age(v_last_partition_timestamp, v_current_partition_timestamp)) / EXTRACT('epoch' FROM v_row.partition_interval::interval));
v_next_partition_timestamp := v_last_partition_timestamp;
-- Loop premaking until config setting is met. Allows it to catch up if it fell behind or if premake changed.
WHILE v_premade_count < v_row.premake LOOP
BEGIN
v_next_partition_timestamp := v_next_partition_timestamp + v_row.partition_interval::interval;
EXCEPTION WHEN datetime_field_overflow THEN
v_premade_count := v_row.premake; -- do this so it can exit the premake check loop and continue in the outer for loop
IF v_jobmon_schema IS NOT NULL THEN
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 skippd for parent table '||v_partition_time);
END IF;
RAISE WARNING 'Attempted partition time interval is outside PostgreSQL''s supported time range. Child partition creation skipped for parent table %', v_row.parent_table;
CONTINUE;
END;
v_last_partition_created := @extschema@.create_partition_time(v_row.parent_table, ARRAY[v_next_partition_timestamp], p_analyze);
v_create_count := v_create_count + 1;
PERFORM @extschema@.create_function_time(v_row.parent_table);
-- Manage additonal constraints if set
PERFORM @extschema@.apply_constraints(v_row.parent_table);
v_premade_count = round(EXTRACT('epoch' FROM age(v_next_partition_timestamp, v_current_partition_timestamp)) / EXTRACT('epoch' FROM v_row.partition_interval::interval));
END LOOP;
ELSIF v_row.partition_type = 'id' THEN
-- Loop through child tables starting from highest to get current max value in partition set
-- Avoids doing a scan on entire partition set and/or getting any values accidentally in parent.
FOR v_row_max_id IN
SELECT show_partitions FROM @extschema@.show_partitions(v_row.parent_table, 'DESC')
LOOP
EXECUTE 'SELECT '||v_row.control||' - ('||v_row.control||' % '||v_row.partition_interval::int||') FROM '||v_row_max_id.show_partitions||'
WHERE '||v_row.control||' = (SELECT max('||v_row.control||') FROM '||v_row_max_id.show_partitions||')'
INTO v_current_partition_id;
IF v_current_partition_id IS NOT NULL THEN
EXIT;
END IF;
END LOOP;
-- Determine if this table is a child of a subpartition parent. If so, get limits to see if run_maintenance even needs to run for it.
SELECT sub_min::bigint, sub_max::bigint INTO v_sub_id_min, v_sub_id_max FROM @extschema@.check_subpartition_limits(v_row.parent_table, 'id');
-- No need to run maintenance if it's outside the bounds of the top parent.
IF v_sub_id_min IS NOT NULL THEN
IF v_current_partition_id < v_sub_id_min OR v_current_partition_id > v_sub_id_max THEN
CONTINUE;
END IF;
END IF;
v_id_position := (length(v_last_partition) - position('p_' in reverse(v_last_partition))) + 2;
v_last_partition_id = substring(v_last_partition from v_id_position)::bigint;
v_next_partition_id := v_last_partition_id + v_row.partition_interval::bigint;
WHILE ((v_next_partition_id - v_current_partition_id) / v_row.partition_interval::bigint) <= v_row.premake
LOOP
v_last_partition_created := @extschema@.create_partition_id(v_row.parent_table, ARRAY[v_next_partition_id], p_analyze);
IF v_last_partition_created THEN
PERFORM @extschema@.create_function_id(v_row.parent_table);
PERFORM @extschema@.apply_constraints(v_row.parent_table);
END IF;
v_next_partition_id := v_next_partition_id + v_row.partition_interval::bigint;
END LOOP;
END IF; -- end main IF check for time or id
END LOOP; -- end of creation loop
-- Manage dropping old partitions if retention option is set
FOR v_row IN
SELECT parent_table FROM @extschema@.part_config WHERE retention IS NOT NULL AND undo_in_progress = false AND
(partition_type = 'time' OR partition_type = 'time-custom')
LOOP
IF p_parent_table IS NULL THEN
v_drop_count := v_drop_count + @extschema@.drop_partition_time(v_row.parent_table);
ELSE -- Only run retention on table given in parameter
IF p_parent_table <> v_row.parent_table THEN
CONTINUE;
ELSE
v_drop_count := v_drop_count + @extschema@.drop_partition_time(v_row.parent_table);
END IF;
END IF;
END LOOP;
FOR v_row IN
SELECT parent_table FROM @extschema@.part_config WHERE retention IS NOT NULL AND undo_in_progress = false AND partition_type = 'id'
LOOP
IF p_parent_table IS NULL THEN
v_drop_count := v_drop_count + @extschema@.drop_partition_id(v_row.parent_table);
ELSE -- Only run retention on table given in parameter
IF p_parent_table <> v_row.parent_table THEN
CONTINUE;
ELSE
v_drop_count := v_drop_count + @extschema@.drop_partition_id(v_row.parent_table);
END IF;
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Partition maintenance finished. '||v_create_count||' partitons made. '||v_drop_count||' partitions dropped.');
IF v_step_overflow_id IS NOT NULL OR v_step_serial_id IS NOT NULL THEN
PERFORM fail_job(v_job_id);
ELSE
PERFORM close_job(v_job_id);
END IF;
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
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 RUN MAINTENANCE'')', v_jobmon_schema) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to list all child partitions in a set.
*/
CREATE OR REPLACE FUNCTION show_partitions (p_parent_table text, p_order text DEFAULT 'ASC') RETURNS SETOF text
LANGUAGE plpgsql STABLE SECURITY DEFINER
AS $$
DECLARE
v_datetime_string text;
v_partition_interval text;
v_type text;
BEGIN
IF p_order NOT IN ('ASC', 'DESC') THEN
RAISE EXCEPTION 'p_order paramter must be one of the following values: ASC, DESC';
END IF;
SELECT partition_type
, partition_interval
, datetime_string
INTO v_type
, v_partition_interval
, v_datetime_string
FROM @extschema@.part_config
WHERE parent_table = p_parent_table;
IF v_type IN ('time', 'time-custom') THEN
RETURN QUERY EXECUTE '
SELECT n.nspname::text ||''.''|| c.relname::text AS partition_name FROM
pg_catalog.pg_inherits h
JOIN pg_catalog.pg_class c ON c.oid = h.inhrelid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE h.inhparent = '||quote_literal(p_parent_table)||'::regclass
ORDER BY to_timestamp(substring(c.relname from ((length(c.relname) - position(''p_'' in reverse(c.relname))) + 2) ), '||quote_literal(v_datetime_string)||') ' || p_order;
ELSIF v_type = 'id' THEN
RETURN QUERY EXECUTE '
SELECT n.nspname::text ||''.''|| c.relname::text AS partition_name FROM
pg_catalog.pg_inherits h
JOIN pg_catalog.pg_class c ON c.oid = h.inhrelid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE h.inhparent = '||quote_literal(p_parent_table)||'::regclass
ORDER BY substring(c.relname from ((length(c.relname) - position(''p_'' in reverse(c.relname))) + 2) )::bigint ' || p_order;
END IF;
END
$$;
/*
* Function to undo partitioning.
* Will actually work on any parent/child table set, not just ones created by pg_partman.
*/
CREATE OR REPLACE FUNCTION undo_partition(p_parent_table text, p_batch_count int DEFAULT 1, p_keep_table boolean DEFAULT true, p_jobmon boolean DEFAULT true, p_lock_wait numeric DEFAULT 0) RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_batch_loop_count bigint := 0;
v_child_count bigint;
v_child_table text;
v_copy_sql text;
v_function_name text;
v_job_id bigint;
v_jobmon_schema text;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval interval;
v_rowcount bigint;
v_step_id bigint;
v_total bigint := 0;
v_trig_name text;
v_undo_count int := 0;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman undo_partition'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'undo_partition already running.';
RETURN 0;
END IF;
IF p_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN UNDO PARTITIONING: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Undoing partitioning for table '||p_parent_table);
END IF;
-- Stops new time partitons from being made as well as stopping child tables from being dropped if they were configured with a retention period.
UPDATE @extschema@.part_config SET undo_in_progress = true WHERE parent_table = p_parent_table;
-- Stop data going into child tables and stop new id partitions from being made.
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
v_trig_name := @extschema@.check_name_length(p_object_name := v_parent_tablename, p_suffix := '_part_trig');
v_function_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, '_part_trig_func', FALSE);
SELECT tgname INTO v_trig_name FROM pg_catalog.pg_trigger t WHERE tgname = v_trig_name;
IF v_trig_name IS NOT NULL THEN
-- lockwait for trigger drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'LOCK TABLE ONLY '||p_parent_table||' IN ACCESS EXCLUSIVE MODE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on parent table to remove trigger';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
EXECUTE 'DROP TRIGGER IF EXISTS '||v_trig_name||' ON '||p_parent_table;
END IF; -- END trigger IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE 'DROP FUNCTION IF EXISTS '||v_function_name||'()';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Stopped partition creation process. Removed trigger & trigger function');
END IF;
WHILE v_batch_loop_count < p_batch_count LOOP
SELECT n.nspname||'.'||c.relname INTO v_child_table
FROM pg_inherits i
JOIN pg_class c ON i.inhrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE i.inhparent::regclass = p_parent_table::regclass
ORDER BY i.inhrelid ASC;
EXIT WHEN v_child_table IS NULL;
EXECUTE 'SELECT count(*) FROM '||v_child_table INTO v_child_count;
IF v_child_count = 0 THEN
-- No rows left in this child table. Remove from partition set.
-- lockwait timeout for table drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'LOCK TABLE ONLY '||v_child_table||' IN ACCESS EXCLUSIVE MODE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on child table for removal from partition set';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE 'ALTER TABLE '||v_child_table||' NO INHERIT ' || p_parent_table;
IF p_keep_table = false THEN
EXECUTE 'DROP TABLE '||v_child_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table DROPPED. Moved '||coalesce(v_rowcount, 0)||' rows to parent');
END IF;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table UNINHERITED, not DROPPED. Copied '||coalesce(v_rowcount, 0)||' rows to parent');
END IF;
END IF;
v_undo_count := v_undo_count + 1;
CONTINUE;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing child partition: '||v_child_table);
END IF;
-- do some locking with timeout, if required
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'SELECT * FROM '|| v_child_table ||' FOR UPDATE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on batch of rows to move';
RETURN -1;
END IF;
END IF;
v_copy_sql := 'INSERT INTO '||p_parent_table||' SELECT * FROM '||v_child_table;
EXECUTE v_copy_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + v_rowcount;
EXECUTE 'ALTER TABLE '||v_child_table||' NO INHERIT ' || p_parent_table;
IF p_keep_table = false THEN
EXECUTE 'DROP TABLE '||v_child_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table DROPPED. Moved '||v_rowcount||' rows to parent');
END IF;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table UNINHERITED, not DROPPED. Copied '||v_rowcount||' rows to parent');
END IF;
END IF;
v_batch_loop_count := v_batch_loop_count + 1;
v_undo_count := v_undo_count + 1;
END LOOP;
IF v_undo_count = 0 THEN
-- FOR loop never ran, so there's no child tables left.
DELETE FROM @extschema@.part_config WHERE parent_table = p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing config from pg_partman (if it existed)');
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
RAISE NOTICE 'Copied % row(s) from % child table(s) to the parent: %', v_total, v_undo_count, p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Final stats');
PERFORM update_step(v_step_id, 'OK', 'Copied '||v_total||' row(s) from '||v_undo_count||' child table(s) to the parent');
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_total;
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 UNDO PARTITIONING: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to undo id-based partitioning created by this extension
*/
CREATE OR REPLACE FUNCTION undo_partition_id(p_parent_table text, p_batch_count int DEFAULT 1, p_batch_interval bigint DEFAULT NULL, p_keep_table boolean DEFAULT true, p_lock_wait numeric DEFAULT 0) RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_batch_loop_count int := 0;
v_child_loop_total bigint := 0;
v_child_min bigint;
v_child_table text;
v_control text;
v_exists int;
v_function_name text;
v_inner_loop_count int;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_move_sql text;
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval bigint;
v_row record;
v_rowcount bigint;
v_step_id bigint;
v_sub_count int;
v_trig_name text;
v_total bigint := 0;
v_undo_count int := 0;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman undo_partition_id'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'undo_partition_id already running.';
RETURN 0;
END IF;
SELECT partition_interval::bigint
, control
, jobmon
INTO v_partition_interval
, v_control
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'id';
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table not found: %', p_parent_table;
END IF;
-- Check if any child tables are themselves partitioned or part of an inheritance tree. Prevent undo at this level if so.
-- Need to either lock child tables at all levels or handle the proper removal of triggers on all child tables first
-- before multi-level undo can be performed safely.
FOR v_row IN
SELECT show_partitions AS child_table FROM @extschema@.show_partitions(p_parent_table)
LOOP
SELECT count(*) INTO v_sub_count
FROM pg_catalog.pg_inherits
WHERE inhparent::regclass = v_row.child_table::regclass;
IF v_sub_count > 0 THEN
RAISE EXCEPTION 'Child table for this parent has child table(s) itself (%). Run undo partitioning on this table or remove inheritance first to ensure all data is properly moved to parent', v_row.child_table;
END IF;
END LOOP;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN UNDO PARTITIONING: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Undoing partitioning for table '||p_parent_table);
END IF;
IF p_batch_interval IS NULL THEN
p_batch_interval := v_partition_interval;
END IF;
-- Stops new time partitons from being made as well as stopping child tables from being dropped if they were configured with a retention period.
UPDATE @extschema@.part_config SET undo_in_progress = true WHERE parent_table = p_parent_table;
-- Stop data going into child tables and stop new id partitions from being made.
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
v_trig_name := @extschema@.check_name_length(p_object_name := v_parent_tablename, p_suffix := '_part_trig');
v_function_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, '_part_trig_func', FALSE);
SELECT tgname INTO v_trig_name FROM pg_catalog.pg_trigger t WHERE tgname = v_trig_name;
IF v_trig_name IS NOT NULL THEN
-- lockwait for trigger drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'LOCK TABLE ONLY '||p_parent_table||' IN ACCESS EXCLUSIVE MODE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on parent table to remove trigger';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
EXECUTE 'DROP TRIGGER IF EXISTS '||v_trig_name||' ON '||p_parent_table;
END IF; -- END trigger IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE 'DROP FUNCTION IF EXISTS '||v_function_name||'()';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Stopped partition creation process. Removed trigger & trigger function');
END IF;
<<outer_child_loop>>
WHILE v_batch_loop_count < p_batch_count LOOP
SELECT n.nspname||'.'||c.relname INTO v_child_table
FROM pg_inherits i
JOIN pg_class c ON i.inhrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE i.inhparent::regclass = p_parent_table::regclass
ORDER BY i.inhrelid ASC;
EXIT WHEN v_child_table IS NULL;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing child partition: '||v_child_table);
END IF;
EXECUTE 'SELECT min('||v_control||') FROM '||v_child_table INTO v_child_min;
IF v_child_min IS NULL THEN
-- No rows left in this child table. Remove from partition set.
-- lockwait timeout for table drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'LOCK TABLE ONLY '||v_child_table||' IN ACCESS EXCLUSIVE MODE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on child table for removal from partition set';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE 'ALTER TABLE '||v_child_table||' NO INHERIT ' || p_parent_table;
IF p_keep_table = false THEN
EXECUTE 'DROP TABLE '||v_child_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table DROPPED. Moved '||v_child_loop_total||' rows to parent');
END IF;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table UNINHERITED, not DROPPED. Moved '||v_child_loop_total||' rows to parent');
END IF;
END IF;
v_undo_count := v_undo_count + 1;
CONTINUE outer_child_loop;
END IF;
v_inner_loop_count := 1;
v_child_loop_total := 0;
<<inner_child_loop>>
LOOP
-- lockwait timeout for row batches
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'SELECT * FROM ' || v_child_table ||
' WHERE '||v_control||' <= '||quote_literal(v_child_min + (p_batch_interval * v_inner_loop_count))
||' FOR UPDATE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on batch of rows to move';
RETURN -1;
END IF;
END IF;
-- Get everything from the current child minimum up to the multiples of the given interval
v_move_sql := 'WITH move_data AS (DELETE FROM '||v_child_table||
' WHERE '||v_control||' <= '||quote_literal(v_child_min + (p_batch_interval * v_inner_loop_count))||' RETURNING *)
INSERT INTO '||p_parent_table||' SELECT * FROM move_data';
EXECUTE v_move_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + v_rowcount;
v_child_loop_total := v_child_loop_total + v_rowcount;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Moved '||v_child_loop_total||' rows to parent.');
END IF;
EXIT inner_child_loop WHEN v_rowcount = 0; -- exit before loop incr if table is empty
v_inner_loop_count := v_inner_loop_count + 1;
v_batch_loop_count := v_batch_loop_count + 1;
EXIT outer_child_loop WHEN v_batch_loop_count >= p_batch_count; -- Exit outer FOR loop if p_batch_count is reached
END LOOP inner_child_loop;
END LOOP outer_child_loop;
IF v_batch_loop_count < p_batch_count THEN
-- FOR loop never ran, so there's no child tables left.
DELETE FROM @extschema@.part_config WHERE parent_table = p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing config from pg_partman');
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
RAISE NOTICE 'Copied % row(s) to the parent. Removed % partitions.', v_total, v_undo_count;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Final stats');
PERFORM update_step(v_step_id, 'OK', 'Copied '||v_total||' row(s) to the parent. Removed '||v_undo_count||' partitions.');
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_total;
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 UNDO PARTITIONING: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Function to undo time-based partitioning created by this extension
*/
CREATE OR REPLACE FUNCTION undo_partition_time(p_parent_table text, p_batch_count int DEFAULT 1, p_batch_interval interval DEFAULT NULL, p_keep_table boolean DEFAULT true, p_lock_wait numeric DEFAULT 0) RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
ex_context text;
ex_detail text;
ex_hint text;
ex_message text;
v_adv_lock boolean;
v_batch_loop_count int := 0;
v_child_min timestamptz;
v_child_loop_total bigint := 0;
v_child_table text;
v_control text;
v_function_name text;
v_inner_loop_count int;
v_lock_iter int := 1;
v_lock_obtained boolean := FALSE;
v_job_id bigint;
v_jobmon boolean;
v_jobmon_schema text;
v_move_sql text;
v_old_search_path text;
v_parent_schema text;
v_parent_tablename text;
v_partition_interval interval;
v_row record;
v_rowcount bigint;
v_step_id bigint;
v_sub_count int;
v_total bigint := 0;
v_trig_name text;
v_type text;
v_undo_count int := 0;
BEGIN
v_adv_lock := pg_try_advisory_xact_lock(hashtext('pg_partman undo_partition_time'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'undo_partition_time already running.';
RETURN 0;
END IF;
SELECT partition_type
, partition_interval::interval
, control
, jobmon
INTO v_type
, v_partition_interval
, v_control
, v_jobmon
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (partition_type = 'time' OR partition_type = 'time-custom');
IF v_partition_interval IS NULL THEN
RAISE EXCEPTION 'Configuration for given parent table not found: %', p_parent_table;
END IF;
-- Check if any child tables are themselves partitioned or part of an inheritance tree. Prevent undo at this level if so.
-- Need to either lock child tables at all levels or handle the proper removal of triggers on all child tables first
-- before multi-level undo can be performed safely.
FOR v_row IN
SELECT show_partitions AS child_table FROM @extschema@.show_partitions(p_parent_table)
LOOP
SELECT count(*) INTO v_sub_count
FROM pg_catalog.pg_inherits
WHERE inhparent::regclass = v_row.child_table::regclass;
IF v_sub_count > 0 THEN
RAISE EXCEPTION 'Child table for this parent has child table(s) itself (%). Run undo partitioning on this table or remove inheritance first to ensure all data is properly moved to parent', v_row.child_table;
END IF;
END LOOP;
IF v_jobmon THEN
SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
IF v_jobmon_schema IS NOT NULL THEN
SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN UNDO PARTITIONING: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Undoing partitioning for table '||p_parent_table);
END IF;
IF p_batch_interval IS NULL THEN
p_batch_interval := v_partition_interval;
END IF;
-- Stops new time partitons from being made as well as stopping child tables from being dropped if they were configured with a retention period.
UPDATE @extschema@.part_config SET undo_in_progress = true WHERE parent_table = p_parent_table;
-- Stop data going into child tables.
SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename FROM pg_tables WHERE schemaname ||'.'|| tablename = p_parent_table;
v_trig_name := @extschema@.check_name_length(p_object_name := v_parent_tablename, p_suffix := '_part_trig');
v_function_name := @extschema@.check_name_length(v_parent_tablename, v_parent_schema, '_part_trig_func', FALSE);
SELECT tgname INTO v_trig_name FROM pg_catalog.pg_trigger t WHERE tgname = v_trig_name;
IF v_trig_name IS NOT NULL THEN
-- lockwait for trigger drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'LOCK TABLE ONLY '||p_parent_table||' IN ACCESS EXCLUSIVE MODE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on parent table to remove trigger';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
EXECUTE 'DROP TRIGGER IF EXISTS '||v_trig_name||' ON '||p_parent_table;
END IF; -- END trigger IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE 'DROP FUNCTION IF EXISTS '||v_function_name||'()';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Stopped partition creation process. Removed trigger & trigger function');
END IF;
<<outer_child_loop>>
WHILE v_batch_loop_count < p_batch_count LOOP
SELECT n.nspname||'.'||c.relname INTO v_child_table
FROM pg_inherits i
JOIN pg_class c ON i.inhrelid = c.oid
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE i.inhparent::regclass = p_parent_table::regclass
ORDER BY i.inhrelid ASC;
EXIT WHEN v_child_table IS NULL;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing child partition: '||v_child_table);
END IF;
EXECUTE 'SELECT min('||v_control||') FROM '||v_child_table INTO v_child_min;
IF v_child_min IS NULL THEN
-- No rows left in this child table. Remove from partition set.
-- lockwait timeout for table drop
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'LOCK TABLE ONLY '||v_child_table||' IN ACCESS EXCLUSIVE MODE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on child table for removal from partition set';
RETURN -1;
END IF;
END IF; -- END p_lock_wait IF
v_lock_obtained := FALSE; -- reset for reuse later
EXECUTE 'ALTER TABLE '||v_child_table||' NO INHERIT ' || p_parent_table;
IF p_keep_table = false THEN
EXECUTE 'DROP TABLE '||v_child_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table DROPPED. Moved '||v_child_loop_total||' rows to parent');
END IF;
ELSE
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Child table UNINHERITED, not DROPPED. Moved '||v_child_loop_total||' rows to parent');
END IF;
END IF;
IF v_type = 'time-custom' THEN
DELETE FROM @extschema@.custom_time_partitions WHERE parent_table = p_parent_table AND child_table = v_child_table;
END IF;
v_undo_count := v_undo_count + 1;
CONTINUE outer_child_loop;
END IF;
v_inner_loop_count := 1;
v_child_loop_total := 0;
<<inner_child_loop>>
LOOP
-- do some locking with timeout, if required
IF p_lock_wait > 0 THEN
v_lock_iter := 0;
WHILE v_lock_iter <= 5 LOOP
v_lock_iter := v_lock_iter + 1;
BEGIN
EXECUTE 'SELECT * FROM ' || v_child_table ||
' WHERE '||v_control||' <= '||quote_literal(v_child_min + (p_batch_interval * v_inner_loop_count))
||' FOR UPDATE NOWAIT';
v_lock_obtained := TRUE;
EXCEPTION
WHEN lock_not_available THEN
PERFORM pg_sleep( p_lock_wait / 5.0 );
CONTINUE;
END;
EXIT WHEN v_lock_obtained;
END LOOP;
IF NOT v_lock_obtained THEN
RAISE NOTICE 'Unable to obtain lock on batch of rows to move';
RETURN -1;
END IF;
END IF;
-- Get everything from the current child minimum up to the multiples of the given interval
v_move_sql := 'WITH move_data AS (DELETE FROM '||v_child_table||
' WHERE '||v_control||' <= '||quote_literal(v_child_min + (p_batch_interval * v_inner_loop_count))||' RETURNING *)
INSERT INTO '||p_parent_table||' SELECT * FROM move_data';
EXECUTE v_move_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total := v_total + v_rowcount;
v_child_loop_total := v_child_loop_total + v_rowcount;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Moved '||v_child_loop_total||' rows to parent.');
END IF;
EXIT inner_child_loop WHEN v_rowcount = 0; -- exit before loop incr if table is empty
v_inner_loop_count := v_inner_loop_count + 1;
v_batch_loop_count := v_batch_loop_count + 1;
EXIT outer_child_loop WHEN v_batch_loop_count >= p_batch_count; -- Exit outer FOR loop if p_batch_count is reached
END LOOP inner_child_loop;
END LOOP outer_child_loop;
IF v_batch_loop_count < p_batch_count THEN
-- FOR loop never ran, so there's no child tables left.
DELETE FROM @extschema@.part_config WHERE parent_table = p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Removing config from pg_partman');
PERFORM update_step(v_step_id, 'OK', 'Done');
END IF;
END IF;
RAISE NOTICE 'Copied % row(s) to the parent. Removed % partitions.', v_total, v_undo_count;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Final stats');
PERFORM update_step(v_step_id, 'OK', 'Copied '||v_total||' row(s) to the parent. Removed '||v_undo_count||' partitions.');
END IF;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_total;
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 UNDO PARTITIONING: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', 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
$$;
/*
* Check if parent table is a subpartition of an already existing id based partition set managed by pg_partman
* If so, limit what child tables can be created based on parent suffix
*/
CREATE OR REPLACE FUNCTION check_subpartition_limits(p_parent_table text, p_type text, OUT sub_min text, OUT sub_max text) RETURNS record
LANGUAGE plpgsql
AS $$
DECLARE
v_datetime_string text;
v_id_position int;
v_partition_interval interval;
v_quarter text;
v_sub_id_max bigint;
v_sub_id_min bigint;
v_sub_timestamp_max timestamp;
v_sub_timestamp_min timestamp;
v_time_position int;
v_top_datetime_string text;
v_top_interval text;
v_top_parent text;
v_top_type text;
v_year text;
BEGIN
-- CTE query is done individually for each type (time, id) because it should return NULL if the top parent is not the same type in a subpartition set (id->time or time->id)
IF p_type = 'id' THEN
WITH top_oid AS (
SELECT i.inhparent AS top_parent_oid
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_inherits i ON c.oid = i.inhrelid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE n.nspname||'.'||c.relname = p_parent_table
) SELECT n.nspname||'.'||c.relname, p.datetime_string, p.partition_interval, p.partition_type
INTO v_top_parent, v_top_datetime_string, v_top_interval, v_top_type
FROM pg_catalog.pg_class c
JOIN top_oid t ON c.oid = t.top_parent_oid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname
WHERE c.oid = t.top_parent_oid
AND p.partition_type = 'id';
IF v_top_parent IS NOT NULL THEN
v_id_position := (length(p_parent_table) - position('p_' in reverse(p_parent_table))) + 2;
v_sub_id_min := substring(p_parent_table from v_id_position)::bigint;
v_sub_id_max := (v_sub_id_min + v_top_interval::bigint) - 1;
sub_min := v_sub_id_min::text;
sub_max := v_sub_id_max::text;
END IF;
ELSIF p_type = 'time' THEN
WITH top_oid AS (
SELECT i.inhparent AS top_parent_oid
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_inherits i ON c.oid = i.inhrelid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE n.nspname||'.'||c.relname = p_parent_table
) SELECT n.nspname||'.'||c.relname, p.datetime_string, p.partition_interval, p.partition_type
INTO v_top_parent, v_top_datetime_string, v_top_interval, v_top_type
FROM pg_catalog.pg_class c
JOIN top_oid t ON c.oid = t.top_parent_oid
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname
WHERE c.oid = t.top_parent_oid
AND p.partition_type = 'time' OR p.partition_type = 'time-custom';
IF v_top_parent IS NOT NULL THEN
v_time_position := (length(p_parent_table) - position('p_' in reverse(p_parent_table))) + 2;
IF v_top_interval::interval <> '3 months' OR (v_top_interval::interval = '3 months' AND v_top_type = 'time-custom') THEN
v_sub_timestamp_min := to_timestamp(substring(p_parent_table from v_time_position), v_top_datetime_string);
ELSE
-- to_timestamp doesn't recognize 'Q' date string formater. Handle it
v_year := split_part(substring(p_parent_table from v_time_position), 'q', 1);
v_quarter := split_part(substring(p_parent_table from v_time_position), 'q', 2);
CASE
WHEN v_quarter = '1' THEN
v_sub_timestamp_min := to_timestamp(v_year || '-01-01', 'YYYY-MM-DD');
WHEN v_quarter = '2' THEN
v_sub_timestamp_min := to_timestamp(v_year || '-04-01', 'YYYY-MM-DD');
WHEN v_quarter = '3' THEN
v_sub_timestamp_min := to_timestamp(v_year || '-07-01', 'YYYY-MM-DD');
WHEN v_quarter = '4' THEN
v_sub_timestamp_min := to_timestamp(v_year || '-10-01', 'YYYY-MM-DD');
END CASE;
END IF;
v_sub_timestamp_max = (v_sub_timestamp_min + v_top_interval::interval) - '1 sec'::interval;
sub_min := v_sub_timestamp_min::text;
sub_max := v_sub_timestamp_max::text;
END IF;
ELSE
RAISE EXCEPTION 'Invalid type given as parameter to check_subpartition_limits()';
END IF;
RETURN;
END
$$;
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