152 lines
4.0 KiB
PL/PgSQL
152 lines
4.0 KiB
PL/PgSQL
--
|
|
-- Statement level tracking
|
|
--
|
|
|
|
SET pg_stat_statements.track_utility = TRUE;
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
|
|
-- DO block - top-level tracking.
|
|
CREATE TABLE stats_track_tab (x int);
|
|
SET pg_stat_statements.track = 'top';
|
|
DELETE FROM stats_track_tab;
|
|
DO $$
|
|
BEGIN
|
|
DELETE FROM stats_track_tab;
|
|
END;
|
|
$$ LANGUAGE plpgsql;
|
|
SELECT toplevel, calls, query FROM pg_stat_statements
|
|
WHERE query LIKE '%DELETE%' ORDER BY query COLLATE "C", toplevel;
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
|
|
-- DO block - all-level tracking.
|
|
SET pg_stat_statements.track = 'all';
|
|
DELETE FROM stats_track_tab;
|
|
DO $$
|
|
BEGIN
|
|
DELETE FROM stats_track_tab;
|
|
END; $$;
|
|
DO LANGUAGE plpgsql $$
|
|
BEGIN
|
|
-- this is a SELECT
|
|
PERFORM 'hello world'::TEXT;
|
|
END; $$;
|
|
SELECT toplevel, calls, query FROM pg_stat_statements
|
|
ORDER BY query COLLATE "C", toplevel;
|
|
|
|
-- DO block - top-level tracking without utility.
|
|
SET pg_stat_statements.track = 'top';
|
|
SET pg_stat_statements.track_utility = FALSE;
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
DELETE FROM stats_track_tab;
|
|
DO $$
|
|
BEGIN
|
|
DELETE FROM stats_track_tab;
|
|
END; $$;
|
|
DO LANGUAGE plpgsql $$
|
|
BEGIN
|
|
-- this is a SELECT
|
|
PERFORM 'hello world'::TEXT;
|
|
END; $$;
|
|
SELECT toplevel, calls, query FROM pg_stat_statements
|
|
ORDER BY query COLLATE "C", toplevel;
|
|
|
|
-- DO block - all-level tracking without utility.
|
|
SET pg_stat_statements.track = 'all';
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
DELETE FROM stats_track_tab;
|
|
DO $$
|
|
BEGIN
|
|
DELETE FROM stats_track_tab;
|
|
END; $$;
|
|
DO LANGUAGE plpgsql $$
|
|
BEGIN
|
|
-- this is a SELECT
|
|
PERFORM 'hello world'::TEXT;
|
|
END; $$;
|
|
SELECT toplevel, calls, query FROM pg_stat_statements
|
|
ORDER BY query COLLATE "C", toplevel;
|
|
|
|
-- PL/pgSQL function - top-level tracking.
|
|
SET pg_stat_statements.track = 'top';
|
|
SET pg_stat_statements.track_utility = FALSE;
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
CREATE FUNCTION PLUS_TWO(i INTEGER) RETURNS INTEGER AS $$
|
|
DECLARE
|
|
r INTEGER;
|
|
BEGIN
|
|
SELECT (i + 1 + 1.0)::INTEGER INTO r;
|
|
RETURN r;
|
|
END; $$ LANGUAGE plpgsql;
|
|
|
|
SELECT PLUS_TWO(3);
|
|
SELECT PLUS_TWO(7);
|
|
|
|
-- SQL function --- use LIMIT to keep it from being inlined
|
|
CREATE FUNCTION PLUS_ONE(i INTEGER) RETURNS INTEGER AS
|
|
$$ SELECT (i + 1.0)::INTEGER LIMIT 1 $$ LANGUAGE SQL;
|
|
|
|
SELECT PLUS_ONE(8);
|
|
SELECT PLUS_ONE(10);
|
|
|
|
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
|
|
-- immutable SQL function --- can be executed at plan time
|
|
CREATE FUNCTION PLUS_THREE(i INTEGER) RETURNS INTEGER AS
|
|
$$ SELECT i + 3 LIMIT 1 $$ IMMUTABLE LANGUAGE SQL;
|
|
|
|
SELECT PLUS_THREE(8);
|
|
SELECT PLUS_THREE(10);
|
|
|
|
SELECT toplevel, calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
|
|
-- PL/pgSQL function - all-level tracking.
|
|
SET pg_stat_statements.track = 'all';
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
|
|
-- we drop and recreate the functions to avoid any caching funnies
|
|
DROP FUNCTION PLUS_ONE(INTEGER);
|
|
DROP FUNCTION PLUS_TWO(INTEGER);
|
|
DROP FUNCTION PLUS_THREE(INTEGER);
|
|
|
|
-- PL/pgSQL function
|
|
CREATE FUNCTION PLUS_TWO(i INTEGER) RETURNS INTEGER AS $$
|
|
DECLARE
|
|
r INTEGER;
|
|
BEGIN
|
|
SELECT (i + 1 + 1.0)::INTEGER INTO r;
|
|
RETURN r;
|
|
END; $$ LANGUAGE plpgsql;
|
|
|
|
SELECT PLUS_TWO(-1);
|
|
SELECT PLUS_TWO(2);
|
|
|
|
-- SQL function --- use LIMIT to keep it from being inlined
|
|
CREATE FUNCTION PLUS_ONE(i INTEGER) RETURNS INTEGER AS
|
|
$$ SELECT (i + 1.0)::INTEGER LIMIT 1 $$ LANGUAGE SQL;
|
|
|
|
SELECT PLUS_ONE(3);
|
|
SELECT PLUS_ONE(1);
|
|
|
|
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
|
|
-- immutable SQL function --- can be executed at plan time
|
|
CREATE FUNCTION PLUS_THREE(i INTEGER) RETURNS INTEGER AS
|
|
$$ SELECT i + 3 LIMIT 1 $$ IMMUTABLE LANGUAGE SQL;
|
|
|
|
SELECT PLUS_THREE(8);
|
|
SELECT PLUS_THREE(10);
|
|
|
|
SELECT toplevel, calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
|
|
--
|
|
-- pg_stat_statements.track = none
|
|
--
|
|
SET pg_stat_statements.track = 'none';
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
|
|
SELECT 1 AS "one";
|
|
SELECT 1 + 1 AS "two";
|
|
|
|
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|