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-- Added support for quarterly time partitioning (trickier than it first appeared)
-- Fixed bug in run_maintenance() that would give an invalid cast to integer error.
-- Fixed some calls to pg_jobmon that were outside the checks to see if it's actually installed
-- Properly reset search path back to original before partman functions were run if pg_jobmon is being used
-- Changed the default premake to 4 instead of 3. This will cause pg_jobmon's default monitoring for 3 consecutive failing jobs to trigger an before the last premade partition is used up.
-- Added optional jobmon logging to run_maintenance() so that if it fails, pg_jobmon can notify that maintenance didn't work.
ALTER TABLE @extschema@.part_config ALTER premake SET DEFAULT 4;
CREATE OR REPLACE FUNCTION create_parent(p_parent_table text, p_control text, p_type @extschema@.partition_type, p_interval text, p_premake int DEFAULT 4, p_debug boolean DEFAULT false) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_current_id bigint;
v_datetime_string text;
v_id_interval bigint;
v_job_id bigint;
v_jobmon_schema text;
v_last_partition_name text;
v_old_search_path text;
v_partition_time timestamp[];
v_partition_id bigint[];
v_max bigint;
v_starting_partition_id bigint;
v_step_id bigint;
v_tablename text;
v_time_interval interval;
BEGIN
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;
EXECUTE 'LOCK TABLE '||p_parent_table||' IN ACCESS EXCLUSIVE MODE';
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;
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;
CASE
WHEN p_interval = 'yearly' THEN
v_time_interval = '1 year';
v_datetime_string := 'YYYY';
WHEN p_interval = 'quarterly' THEN
v_time_interval = '3 months';
v_datetime_string = 'YYYY"q"Q';
WHEN p_interval = 'monthly' THEN
v_time_interval = '1 month';
v_datetime_string := 'YYYY_MM';
WHEN p_interval = 'weekly' THEN
v_time_interval = '1 week';
v_datetime_string := 'IYYY"w"IW';
WHEN p_interval = 'daily' THEN
v_time_interval = '1 day';
v_datetime_string := 'YYYY_MM_DD';
WHEN p_interval = 'hourly' THEN
v_time_interval = '1 hour';
v_datetime_string := 'YYYY_MM_DD_HH24MI';
WHEN p_interval = 'half-hour' THEN
v_time_interval = '30 mins';
v_datetime_string := 'YYYY_MM_DD_HH24MI';
WHEN p_interval = 'quarter-hour' THEN
v_time_interval = '15 mins';
v_datetime_string := 'YYYY_MM_DD_HH24MI';
ELSE
IF p_type = 'id-static' OR p_type = 'id-dynamic' THEN
v_id_interval := p_interval::bigint;
ELSE
RAISE EXCEPTION 'Invalid interval for time based partitioning: %', p_interval;
END IF;
END CASE;
IF p_type = 'time-static' OR p_type = 'time-dynamic' THEN
FOR i IN 0..p_premake LOOP
v_partition_time := array_append(v_partition_time, quote_literal(CURRENT_TIMESTAMP + (v_time_interval*i))::timestamp);
END LOOP;
EXECUTE 'SELECT @extschema@.create_time_partition('||quote_literal(p_parent_table)||','||quote_literal(p_control)||','
||quote_literal(v_time_interval)||','||quote_literal(v_datetime_string)||','||quote_literal(v_partition_time)||')' INTO v_last_partition_name;
INSERT INTO @extschema@.part_config (parent_table, type, part_interval, control, premake, datetime_string, last_partition) VALUES
(p_parent_table, p_type, v_time_interval, p_control, p_premake, v_datetime_string, v_last_partition_name);
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-static' OR p_type = 'id-dynamic' THEN
-- If there is already data, start partitioning with the highest current value
EXECUTE 'SELECT COALESCE(max('||p_control||')::bigint, 0) FROM '||p_parent_table||' LIMIT 1' INTO v_max;
v_starting_partition_id := v_max - (v_max % v_id_interval);
FOR i IN 0..p_premake LOOP
v_partition_id = array_append(v_partition_id, (v_id_interval*i)+v_starting_partition_id);
END LOOP;
EXECUTE 'SELECT @extschema@.create_id_partition('||quote_literal(p_parent_table)||','||quote_literal(p_control)||','
||v_id_interval||','||quote_literal(v_partition_id)||')' INTO v_last_partition_name;
INSERT INTO @extschema@.part_config (parent_table, type, part_interval, control, premake, last_partition) VALUES
(p_parent_table, p_type, v_id_interval, p_control, p_premake, v_last_partition_name);
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'ID partitions premade: '||p_premake);
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-static' OR p_type = 'time-dynamic' THEN
EXECUTE 'SELECT @extschema@.create_time_function('||quote_literal(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-static' OR p_type = 'id-dynamic' THEN
v_current_id := COALESCE(v_max, 0);
EXECUTE 'SELECT @extschema@.create_id_function('||quote_literal(p_parent_table)||','||v_current_id||')';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'ID function created');
END IF;
END IF;
IF v_jobmon_schema IS NOT NULL THEN
v_step_id := add_step(v_job_id, 'Creating partition trigger');
END IF;
EXECUTE 'SELECT @extschema@.create_trigger('||quote_literal(p_parent_table)||')';
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
PERFORM close_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
EXCEPTION
WHEN OTHERS THEN
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
IF v_job_id IS NULL THEN
v_job_id := add_job('PARTMAN CREATE PARENT: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Partition creation for table '||p_parent_table||' failed');
ELSIF v_step_id IS NULL THEN
v_step_id := add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RAISE EXCEPTION '%', SQLERRM;
END
$$;
CREATE OR REPLACE FUNCTION create_time_partition (p_parent_table text, p_control text, p_interval interval, p_datetime_string text, p_partition_times timestamp[]) RETURNS text
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_job_id bigint;
v_jobmon_schema text;
v_old_search_path text;
v_partition_name text;
v_partition_timestamp_end timestamp;
v_partition_timestamp_start timestamp;
v_quarter text;
v_step_id bigint;
v_tablename text;
v_time timestamp;
v_year text;
BEGIN
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;
FOREACH v_time IN ARRAY p_partition_times LOOP
v_partition_name := p_parent_table || '_p';
IF p_interval = '1 year' OR p_interval = '1 month' OR p_interval = '1 day' OR p_interval = '1 hour' OR p_interval = '30 mins' OR p_interval = '15 mins' THEN
v_partition_name := v_partition_name || to_char(v_time, 'YYYY');
IF p_interval = '1 month' OR p_interval = '1 day' OR p_interval = '1 hour' OR p_interval = '30 mins' OR p_interval = '15 mins' THEN
v_partition_name := v_partition_name || '_' || to_char(v_time, 'MM');
IF p_interval = '1 day' OR p_interval = '1 hour' OR p_interval = '30 mins' OR p_interval = '15 mins' THEN
v_partition_name := v_partition_name || '_' || to_char(v_time, 'DD');
IF p_interval = '1 hour' OR p_interval = '30 mins' OR p_interval = '15 mins' THEN
v_partition_name := v_partition_name || '_' || to_char(v_time, 'HH24');
IF p_interval <> '30 mins' AND p_interval <> '15 mins' THEN
v_partition_name := v_partition_name || '00';
ELSIF p_interval = '15 mins' THEN
IF date_part('minute', v_time) < 15 THEN
v_partition_name := v_partition_name || '00';
ELSIF date_part('minute', v_time) >= 15 AND date_part('minute', v_time) < 30 THEN
v_partition_name := v_partition_name || '15';
ELSIF date_part('minute', v_time) >= 30 AND date_part('minute', v_time) < 45 THEN
v_partition_name := v_partition_name || '30';
ELSE
v_partition_name := v_partition_name || '45';
END IF;
ELSIF p_interval = '30 mins' THEN
IF date_part('minute', v_time) < 30 THEN
v_partition_name := v_partition_name || '00';
ELSE
v_partition_name := v_partition_name || '30';
END IF;
END IF;
END IF; -- end hour IF
END IF; -- end day IF
END IF; -- end month IF
ELSIF p_interval = '1 week' THEN
v_partition_name := v_partition_name || to_char(v_time, 'IYYY') || 'w' || to_char(v_time, 'IW');
END IF; -- end year/week IF
-- pull out datetime portion of last partition's tablename
v_partition_timestamp_start := to_timestamp(substring(v_partition_name from char_length(p_parent_table||'_p')+1), p_datetime_string);
v_partition_timestamp_end := to_timestamp(substring(v_partition_name from char_length(p_parent_table||'_p')+1), p_datetime_string) + p_interval;
-- "Q" is ignored in to_timestamp, so handle special case
IF p_interval = '3 months' THEN
v_year := to_char(v_time, 'YYYY');
v_quarter := to_char(v_time, 'Q');
v_partition_name := v_partition_name || v_year || 'q' || v_quarter;
CASE
WHEN v_quarter = '1' THEN
v_partition_timestamp_start := to_timestamp(v_year || '-01-01', 'YYYY-MM-DD');
WHEN v_quarter = '2' THEN
v_partition_timestamp_start := to_timestamp(v_year || '-04-01', 'YYYY-MM-DD');
WHEN v_quarter = '3' THEN
v_partition_timestamp_start := to_timestamp(v_year || '-07-01', 'YYYY-MM-DD');
WHEN v_quarter = '4' THEN
v_partition_timestamp_start := to_timestamp(v_year || '-10-01', 'YYYY-MM-DD');
END CASE;
v_partition_timestamp_end := v_partition_timestamp_start + p_interval;
END IF;
SELECT schemaname ||'.'|| 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;
IF v_jobmon_schema IS NOT NULL THEN
v_job_id := add_job('PARTMAN CREATE TABLE: '||p_parent_table);
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;
IF position('.' in p_parent_table) > 0 THEN
v_tablename := substring(v_partition_name from position('.' in v_partition_name)+1);
END IF;
EXECUTE 'CREATE TABLE '||v_partition_name||' (LIKE '||p_parent_table||' INCLUDING DEFAULTS INCLUDING INDEXES)';
EXECUTE 'ALTER TABLE '||v_partition_name||' ADD CONSTRAINT '||v_tablename||'_partition_check
CHECK ('||p_control||'>='||quote_literal(v_partition_timestamp_start)||' AND '||p_control||'<'||quote_literal(v_partition_timestamp_end)||')';
EXECUTE 'ALTER TABLE '||v_partition_name||' INHERIT '||p_parent_table;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Done');
PERFORM close_job(v_job_id);
END IF;
END LOOP;
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RETURN v_partition_name;
EXCEPTION
WHEN OTHERS THEN
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
IF v_job_id IS NULL THEN
v_job_id := add_job('PARTMAN CREATE TABLE: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Partition maintenance for table '||p_parent_table||' failed');
ELSIF v_step_id IS NULL THEN
v_step_id := add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RAISE EXCEPTION '%', SQLERRM;
END
$$;
CREATE OR REPLACE FUNCTION create_time_function(p_parent_table text) RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_1st_partition_name text;
v_1st_partition_timestamp timestamp;
v_2nd_partition_name text;
v_2nd_partition_timestamp timestamp;
v_control text;
v_current_partition_name text;
v_current_partition_timestamp timestamp;
v_datetime_string text;
v_final_partition_timestamp timestamp;
v_job_id bigint;
v_jobmon_schema text;
v_old_search_path text;
v_part_interval interval;
v_prev_partition_name text;
v_prev_partition_timestamp timestamp;
v_step_id bigint;
v_trig_func text;
v_type text;
BEGIN
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;
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 type
, part_interval::interval
, control
, datetime_string
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (type = 'time-static' OR type = 'time-dynamic')
INTO v_type, v_part_interval, v_control, v_datetime_string;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
IF v_type = 'time-static' THEN
CASE
WHEN v_part_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_part_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_part_interval = '1 hour' THEN
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP);
WHEN v_part_interval = '1 day' THEN
v_current_partition_timestamp := date_trunc('day', CURRENT_TIMESTAMP);
WHEN v_part_interval = '1 week' THEN
v_current_partition_timestamp := date_trunc('week', CURRENT_TIMESTAMP);
WHEN v_part_interval = '1 month' THEN
v_current_partition_timestamp := date_trunc('month', CURRENT_TIMESTAMP);
WHEN v_part_interval = '3 months' THEN
v_current_partition_timestamp := date_trunc('quarter', CURRENT_TIMESTAMP);
WHEN v_part_interval = '1 year' THEN
v_current_partition_timestamp := date_trunc('year', CURRENT_TIMESTAMP);
END CASE;
v_prev_partition_timestamp := v_current_partition_timestamp - v_part_interval::interval;
v_1st_partition_timestamp := v_current_partition_timestamp + v_part_interval::interval;
v_2nd_partition_timestamp := v_1st_partition_timestamp + v_part_interval::interval;
v_final_partition_timestamp := v_2nd_partition_timestamp + v_part_interval::interval;
v_prev_partition_name := p_parent_table || '_p' || to_char(v_prev_partition_timestamp, v_datetime_string);
v_current_partition_name := p_parent_table || '_p' || to_char(v_current_partition_timestamp, v_datetime_string);
v_1st_partition_name := p_parent_table || '_p' || to_char(v_1st_partition_timestamp, v_datetime_string);
v_2nd_partition_name := p_parent_table || '_p' || to_char(v_2nd_partition_timestamp, v_datetime_string);
v_trig_func := 'CREATE OR REPLACE FUNCTION '||p_parent_table||'_part_trig_func() RETURNS trigger LANGUAGE plpgsql AS $t$
BEGIN
IF TG_OP = ''INSERT'' THEN
IF NEW.'||v_control||' >= '||quote_literal(v_current_partition_timestamp)||' AND NEW.'||v_control||' < '||quote_literal(v_1st_partition_timestamp)|| ' THEN
INSERT INTO '||v_current_partition_name||' VALUES (NEW.*);
ELSIF NEW.'||v_control||' >= '||quote_literal(v_1st_partition_timestamp)||' AND NEW.'||v_control||' < '||quote_literal(v_2nd_partition_timestamp)|| ' THEN
INSERT INTO '||v_1st_partition_name||' VALUES (NEW.*);
ELSIF NEW.'||v_control||' >= '||quote_literal(v_2nd_partition_timestamp)||' AND NEW.'||v_control||' < '||quote_literal(v_final_partition_timestamp)|| ' THEN
INSERT INTO '||v_2nd_partition_name||' VALUES (NEW.*);
ELSIF NEW.'||v_control||' >= '||quote_literal(v_prev_partition_timestamp)||' AND NEW.'||v_control||' < '||quote_literal(v_current_partition_timestamp)|| ' THEN
INSERT INTO '||v_prev_partition_name||' VALUES (NEW.*);
ELSE
RETURN NEW;
END IF;
END IF;
RETURN NULL;
END $t$;';
-- RAISE NOTICE 'v_trig_func: %',v_trig_func;
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_1st_partition_timestamp-'1sec'::interval));
END IF;
ELSIF v_type = 'time-dynamic' THEN
v_trig_func := 'CREATE OR REPLACE FUNCTION '||p_parent_table||'_part_trig_func() RETURNS trigger LANGUAGE plpgsql AS $t$
DECLARE
v_partition_name text;
v_partition_timestamp timestamp;
BEGIN
IF TG_OP = ''INSERT'' THEN
';
CASE
WHEN v_part_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);';
WHEN v_part_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);';
WHEN v_part_interval = '1 hour' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''hour'', NEW.'||v_control||');';
WHEN v_part_interval = '1 day' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''day'', NEW.'||v_control||');';
WHEN v_part_interval = '1 week' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''week'', NEW.'||v_control||');';
WHEN v_part_interval = '1 month' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''month'', NEW.'||v_control||');';
WHEN v_part_interval = '3 months' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''quarter'', NEW.'||v_control||');';
WHEN v_part_interval = '1 year' THEN
v_trig_func := v_trig_func||'v_partition_timestamp := date_trunc(''year'', NEW.'||v_control||');';
END CASE;
v_trig_func := v_trig_func||'
v_partition_name := '''||p_parent_table||'_p''|| to_char(v_partition_timestamp, '||quote_literal(v_datetime_string)||');
EXECUTE ''INSERT INTO ''||v_partition_name||'' VALUES($1.*)'' USING NEW;
END IF;
RETURN NULL;
END $t$;';
--RAISE NOTICE 'v_trig_func: %',v_trig_func;
EXECUTE v_trig_func;
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Added function for dynamic 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
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
IF v_job_id IS NULL THEN
v_job_id := add_job('PARTMAN CREATE FUNCTION: '||p_parent_table);
v_step_id := add_step(v_job_id, 'Partition function maintenance for table '||p_parent_table||' failed');
ELSIF v_step_id IS NULL THEN
v_step_id := add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'BAD', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
RAISE EXCEPTION '%', SQLERRM;
END
$$;
CREATE OR REPLACE FUNCTION create_next_time_partition (p_parent_table text) RETURNS void
LANGUAGE plpgsql
AS $$
DECLARE
v_control text;
v_datetime_string text;
v_last_partition text;
v_next_partition_timestamp timestamp;
v_next_year text;
v_part_interval interval;
v_quarter text;
v_tablename text;
v_type @extschema@.partition_type;
v_year text;
BEGIN
SELECT type
, part_interval::interval
, control
, datetime_string
, last_partition
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (type = 'time-static' OR type = 'time-dynamic')
INTO v_type, v_part_interval, v_control, v_datetime_string, v_last_partition;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
-- Double check that last created partition exists
IF v_last_partition IS NOT NULL THEN
SELECT tablename INTO v_tablename FROM pg_tables WHERE schemaname || '.' || tablename = v_last_partition;
IF v_tablename IS NULL THEN
RAISE EXCEPTION 'ERROR: previous partition table missing. Unable to determine next proper partition in sequence.';
END IF;
ELSE
RAISE EXCEPTION 'ERROR: last known partition missing from config table for parent table %.', p_parent_table;
END IF;
-- pull out datetime portion of last partition's tablename to make the next one
IF v_part_interval != '3 months' THEN
v_next_partition_timestamp := to_timestamp(substring(v_last_partition from char_length(p_parent_table||'_p')+1), v_datetime_string) + v_part_interval;
ELSE
-- to_timestamp doesn't recognize 'Q' date string formater. Handle it
v_year := split_part(substring(v_last_partition from char_length(p_parent_table||'_p')+1), 'q', 1);
v_next_year := extract('year' from to_date(v_year, 'YYYY')+'1year'::interval);
v_quarter := split_part(substring(v_last_partition from char_length(p_parent_table||'_p')+1), 'q', 2);
CASE
WHEN v_quarter = '1' THEN
v_next_partition_timestamp := to_timestamp(v_year || '-04-01', 'YYYY-MM-DD');
WHEN v_quarter = '2' THEN
v_next_partition_timestamp := to_timestamp(v_year || '-07-01', 'YYYY-MM-DD');
WHEN v_quarter = '3' THEN
v_next_partition_timestamp := to_timestamp(v_year || '-10-01', 'YYYY-MM-DD');
WHEN v_quarter = '4' THEN
v_next_partition_timestamp := to_timestamp(v_next_year || '-01-01', 'YYYY-MM-DD');
END CASE;
END IF;
EXECUTE 'SELECT @extschema@.create_time_partition('||quote_literal(p_parent_table)||','||quote_literal(v_control)||','||quote_literal(v_part_interval)||','
||quote_literal(v_datetime_string)||','||quote_literal(ARRAY[v_next_partition_timestamp])||')' INTO v_last_partition;
IF v_last_partition IS NOT NULL THEN
UPDATE @extschema@.part_config SET last_partition = v_last_partition WHERE parent_table = p_parent_table;
END IF;
END
$$;
CREATE OR REPLACE FUNCTION create_prev_time_partition(p_parent_table text, p_batch int DEFAULT 1) RETURNS bigint
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_control text;
v_datetime_string text;
v_last_partition_name text;
v_max_partition_timestamp timestamp;
v_min_control timestamp;
v_min_partition_timestamp timestamp;
v_part_interval interval;
v_partition_timestamp timestamp[];
v_rowcount bigint;
v_sql text;
v_total_rows bigint := 0;
v_type text;
BEGIN
SELECT type
, part_interval::interval
, control
, datetime_string
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND (type = 'time-static' OR type = 'time-dynamic')
INTO v_type, v_part_interval, v_control, v_datetime_string;
IF NOT FOUND THEN
RAISE EXCEPTION 'ERROR: no config found for %', p_parent_table;
END IF;
EXECUTE 'SELECT min('||v_control||') FROM ONLY '||p_parent_table INTO v_min_control;
IF v_min_control IS NULL THEN
RETURN 0;
END IF;
CASE
WHEN v_part_interval = '15 mins' THEN
v_min_partition_timestamp := date_trunc('hour', v_min_control) +
'15min'::interval * floor(date_part('minute', v_min_control) / 15.0);
WHEN v_part_interval = '30 mins' THEN
v_min_partition_timestamp := date_trunc('hour', v_min_control) +
'30min'::interval * floor(date_part('minute', v_min_control) / 30.0);
WHEN v_part_interval = '1 hour' THEN
v_min_partition_timestamp := date_trunc('hour', v_min_control);
WHEN v_part_interval = '1 day' THEN
v_min_partition_timestamp := date_trunc('day', v_min_control);
WHEN v_part_interval = '1 week' THEN
v_min_partition_timestamp := date_trunc('week', v_min_control);
WHEN v_part_interval = '1 month' THEN
v_min_partition_timestamp := date_trunc('month', v_min_control);
WHEN v_part_interval = '3 months' THEN
v_min_partition_timestamp := date_trunc('quarter', v_min_control);
WHEN v_part_interval = '1 year' THEN
v_min_partition_timestamp := date_trunc('year', v_min_control);
END CASE;
-- Subtract 1 so that batch count number actually makes sense
FOR i IN 0..p_batch-1 LOOP
v_partition_timestamp := ARRAY[(v_min_partition_timestamp + (v_part_interval*i))::timestamp];
RAISE NOTICE 'v_partition_timestamp: %',v_partition_timestamp;
v_max_partition_timestamp := v_min_partition_timestamp + (v_part_interval*(i+1));
RAISE NOTICE 'v_max_partition_timestamp: %',v_max_partition_timestamp;
v_sql := 'SELECT @extschema@.create_time_partition('||quote_literal(p_parent_table)||','||quote_literal(v_control)||','
||quote_literal(v_part_interval)||','||quote_literal(v_datetime_string)||','||quote_literal(v_partition_timestamp)||')';
RAISE NOTICE 'v_sql: %', v_sql;
EXECUTE v_sql INTO v_last_partition_name;
-- create_time_partition() already checks to see if the partition exists and skips creation if it does.
-- So this function will still work with already existing partitions to get all data moved out of parent table up to and including when
-- pg_partman was used to set up partitioning.
v_sql := '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_last_partition_name||' SELECT * FROM partition_data';
RAISE NOTICE 'v_sql: %', v_sql;
EXECUTE v_sql;
GET DIAGNOSTICS v_rowcount = ROW_COUNT;
v_total_rows := v_total_rows + v_rowcount;
IF v_rowcount = 0 THEN
EXIT;
END IF;
END LOOP;
RETURN v_total_rows;
END
$$;
CREATE OR REPLACE FUNCTION run_maintenance() RETURNS void
LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
v_adv_lock boolean;
v_count int := 0;
v_current_partition_timestamp timestamp;
v_datetime_string text;
v_job_id bigint;
v_jobmon_schema text;
v_last_partition_timestamp timestamp;
v_old_search_path text;
v_premade_count real;
v_quarter text;
v_step_id bigint;
v_row record;
v_year text;
BEGIN
v_adv_lock := pg_try_advisory_lock(hashtext('pg_partman run_maintenance'));
IF v_adv_lock = 'false' THEN
RAISE NOTICE 'Partman maintenance already running.';
RETURN;
END IF;
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;
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;
FOR v_row IN
SELECT parent_table
, type
, part_interval::interval
, control
, premake
, datetime_string
, last_partition
FROM @extschema@.part_config WHERE type = 'time-static' OR type = 'time-dynamic'
LOOP
CASE
WHEN v_row.part_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.part_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.part_interval = '1 hour' THEN
v_current_partition_timestamp := date_trunc('hour', CURRENT_TIMESTAMP);
WHEN v_row.part_interval = '1 day' THEN
v_current_partition_timestamp := date_trunc('day', CURRENT_TIMESTAMP);
WHEN v_row.part_interval = '1 week' THEN
v_current_partition_timestamp := date_trunc('week', CURRENT_TIMESTAMP);
WHEN v_row.part_interval = '1 month' THEN
v_current_partition_timestamp := date_trunc('month', CURRENT_TIMESTAMP);
WHEN v_row.part_interval = '3 months' THEN
v_current_partition_timestamp := date_trunc('quarter', CURRENT_TIMESTAMP);
WHEN v_row.part_interval = '1 year' THEN
v_current_partition_timestamp := date_trunc('year', CURRENT_TIMESTAMP);
END CASE;
IF v_row.part_interval != '3 months' THEN
v_last_partition_timestamp := to_timestamp(substring(v_row.last_partition from char_length(v_row.parent_table||'_p')+1), v_row.datetime_string);
ELSE
-- to_timestamp doesn't recognize 'Q' date string formater. Handle it
v_year := split_part(substring(v_row.last_partition from char_length(v_row.parent_table||'_p')+1), 'q', 1);
v_quarter := split_part(substring(v_row.last_partition from char_length(v_row.parent_table||'_p')+1), '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. If it's less than premake in config table, make another
v_premade_count = EXTRACT('epoch' FROM (v_last_partition_timestamp - v_current_partition_timestamp)::interval) / EXTRACT('epoch' FROM v_row.part_interval::interval);
IF v_premade_count < v_row.premake THEN
RAISE NOTICE 'Creating next partition';
EXECUTE 'SELECT @extschema@.create_next_time_partition('||quote_literal(v_row.parent_table)||')';
IF v_row.type = 'time-static' THEN
EXECUTE 'SELECT @extschema@.create_time_function('||quote_literal(v_row.parent_table)||')';
END IF;
END IF;
v_count := v_count + 1;
END LOOP; -- end of main loop
IF v_jobmon_schema IS NOT NULL THEN
PERFORM update_step(v_step_id, 'OK', 'Partition maintenance finished. '||v_count||' partitons made');
PERFORM close_job(v_job_id);
END IF;
PERFORM pg_advisory_unlock(hashtext('pg_partman run_maintenance'));
EXCEPTION
WHEN QUERY_CANCELED THEN
PERFORM pg_advisory_unlock(hashtext('pg_partman run_maintenance'));
RAISE EXCEPTION '%', SQLERRM;
WHEN OTHERS THEN
IF v_jobmon_schema IS NOT NULL THEN
EXECUTE 'SELECT set_config(''search_path'',''@extschema@,'||v_jobmon_schema||''',''false'')';
IF v_job_id IS NULL THEN
v_job_id := add_job('PARTMAN RUN MAINTENANCE');
v_step_id := add_step(v_job_id, 'EXCEPTION before job logging started');
END IF;
IF v_step_id IS NULL THEN
v_step_id := add_step(v_job_id, 'EXCEPTION before first step logged');
END IF;
PERFORM update_step(v_step_id, 'CRITICAL', 'ERROR: '||coalesce(SQLERRM,'unknown'));
PERFORM fail_job(v_job_id);
EXECUTE 'SELECT set_config(''search_path'','''||v_old_search_path||''',''false'')';
END IF;
PERFORM pg_advisory_unlock(hashtext('pg_partman run_maintenance'));
RAISE EXCEPTION '%', SQLERRM;
END
$$;
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