-- IMPORTANT NOTE: This version, and all future versions of pg_partman >= 2.0.0, are only compatible with PostgreSQL 9.4 and greater. -- I do not have any current plans for development on the v1.x.x branch anymore. Reported bugs will be fixed, but all development will only be on the 2.x.x from here on out. Bug fixes will also only be done while versions of PostgreSQL older than 9.4 are themselves officially supported. If a bug only exists in an unsupported version of PostgreSQL, it WILL NOT be fixed. And once PostgreSQL 9.3 goes EOL, the 1.8 series will be deprecated entirely. -- No new features, API changes, configuration options or major internal structure changes will be accepted for the 1.x.x series. These will be locked to the 1.8.x series. No future 1.x.x versions after 1.8.7 will be able to be installed directly. You will have to install 1.8.7 (tagged version releases are available on github) and then install the updates found in the "updates" folder of later versions to get to the latest 1.x.x version. I unfortunately don't have time to be maintaining two independent branches with the way extension versions work now in PostgreSQL. Even fixing bugs in the 1.8.x series will be troublesome since I then have to redo every 1.8.x -> 2.x.x update file every time to ensure all fixes are applied no matter the upgrade path. This will unfortunately break managing the 1.x.x series via PGXN. I'm sorry but I don't see any other way around this with the way extension versions are managed right now. I highly recommend updating your database to 9.4+ if you wish to easily maintain this extension going forward. There's tons of other great new features and performance improvements, so it's definitely worth the effort! -- A background worker process (BGW) has been added to pg_partman for general partition maintenance. -- A separate scheduler is no longer required in most cases if you compile pg_partman with the background worker option. -- New postgresql.conf configuration options are listed in the documentation. You must at minimum give the database names you want the BGW to run for. The rest have defaults if not set. Only a reload is required to change values once the database is started with the BGW running. -- The BGW can only be started at cluster start. This may change later, but it is done this way for initial simplicity and with future design ideas in mind. -- There are no longer distinct "static" and "dynamic" partitioning modes. The features of each mode have been combined into a single trigger format. -- All triggers now have the static INSERT statements for the premake window first followed by a fallback, dynamic option to insert to the child table if it exists. -- Whenever the next child partition is created for a partition set, its function will automatically be updated to the new version. If you'd like to update all partition sets immediately, see the code following these release notes in the update file. I cannot make this automatically part of the update because doing so would cause all the new trigger functions that are created to be part of the extension. After updating, all old "static" sets will still work as they did before, but will have an additional fallback case to handle inserts to child tables outside the current premake value if the child table exists. All old "dynamic" sets will now have the "static" conditions added before the dynamic portion and you should see a performance improvement for any data inserted within the premake window. As before, any data that is inserted that has no associated child table will go to the parent. -- The "time-custom" partition type still exists and has not changed for those that need an interval other than the predefined ones. It still uses a lookup table and sacrifices performance for flexibility. -- Eliminated nearly half of the existing pgtap tests due to this change (but added some new ones). -- See my blog post for the explanation of what "static" and "dynamic" meant. http://www.keithf4.com/postgresql-partition-manager -- If retention system is turned on, jobmon no longer logs entries if no retention work was actually done. Would previously just log that zero tables were dropped. If anything is dropped/uninherited, it will be logged as expected. -- Changed column "type" in part_config to "partition_type". "type" is a reserved word, but not currently strictly enforced (doesn't require double-quoting). This avoids any possible future issues. Also changed sub_type in part_config_sub to "sub_partition_type" for consistency -- Changed column "part_interval" in part_config & part_config_sub to "partition_interval" to be more consistent with above renamed column. -- Now uses new, more extensive GET STACKED DIAGNOSTIC feature added in 9.2 to provide more detailed errors when an exception is encountered. Previously when functions called other functions and a custom exception block was used, only the latest function called would report the error. Now a more full stack trace is available to see the original function that caused the error. -- Thanks to https://github.com/IMSoP for the extensive documentation formatting improvements. /*********************************************************** -- Begin code to migrate existing partition sets to new hybrid function -- You may need to adjust the setting of the search_path below to point the following commands to the schema that partman is installed to SELECT set_config('search_path','partman, public',false); CREATE TEMP TABLE partman_migrate_hybrid_temp (statement text); INSERT INTO partman_migrate_hybrid_temp SELECT format('SELECT create_function_id(%L);', parent_table) FROM part_config WHERE partition_type = 'id'; INSERT INTO partman_migrate_hybrid_temp SELECT format('SELECT create_function_time(%L);', parent_table) FROM part_config WHERE partition_type = 'time'; DO $$ DECLARE v_row record; BEGIN FOR v_row IN SELECT statement FROM partman_migrate_hybrid_temp LOOP IF v_row.statement IS NOT NULL THEN EXECUTE v_row.statement; END IF; END LOOP; END $$; DROP TABLE IF EXISTS partman_migrate_hybrid_temp; -- End code to migrate existing partition sets to new hybrid function ************************************************************/ 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; -- This table was only created if the version of postgres was >= 9.2 at the time of v1.6.0 installation. Account for -- when people are upgrading from 1.x to 2.x and if they may have been on 9.1 at the time CREATE TABLE IF NOT EXISTS @extschema@.custom_time_partitions ( parent_table text NOT NULL , child_table text NOT NULL , partition_range tstzrange NOT NULL , PRIMARY KEY (parent_table, child_table)); -- IF EXISTS clause to CREATE INDEX was not added until 9.5, so use DO block instead since we're 9.4 compatible DO $$ DECLARE v_exists smallint; BEGIN SELECT count(*) FROM pg_catalog.pg_class INTO v_exists WHERE relname = 'custom_time_partitions_partition_range_idx' AND relkind = 'i'; IF v_exists < 1 THEN CREATE INDEX custom_time_partitions_partition_range_idx ON custom_time_partitions USING gist (partition_range); END IF; END $$; SELECT pg_catalog.pg_extension_config_dump('custom_time_partitions', ''); CREATE INDEX IF NOT EXISTS custom_time_partitions_partition_range_idx ON @extschema@.custom_time_partitions USING gist (partition_range); SELECT pg_catalog.pg_extension_config_dump('custom_time_partitions', ''); --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 DEFAULT NULL, 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; <> 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; <> 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; <> 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; <> 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 $$;