postgresql/contrib/pg_stat_statements/sql/pg_stat_statements.sql

199 lines
4.2 KiB
PL/PgSQL

CREATE EXTENSION pg_stat_statements;
--
-- simple and compound statements
--
SET pg_stat_statements.track_utility = FALSE;
SELECT pg_stat_statements_reset();
SELECT 1 AS "int";
SELECT 'hello'
-- multiline
AS "text";
SELECT 'world' AS "text";
-- transaction
BEGIN;
SELECT 1 AS "int";
SELECT 'hello' AS "text";
COMMIT;
-- compound transaction
BEGIN \;
SELECT 2.0 AS "float" \;
SELECT 'world' AS "text" \;
COMMIT;
-- compound with empty statements and spurious leading spacing
\;\; SELECT 3 + 3 \;\;\; SELECT ' ' || ' !' \;\; SELECT 1 + 4 \;;
-- non ;-terminated statements
SELECT 1 + 1 + 1 AS "add" \gset
SELECT :add + 1 + 1 AS "add" \;
SELECT :add + 1 + 1 AS "add" \gset
-- set operator
SELECT 1 AS i UNION SELECT 2 ORDER BY i;
-- ? operator
select '{"a":1, "b":2}'::jsonb ? 'b';
-- cte
WITH t(f) AS (
VALUES (1.0), (2.0)
)
SELECT f FROM t ORDER BY f;
-- prepared statement with parameter
PREPARE pgss_test (int) AS SELECT $1, 'test' LIMIT 1;
EXECUTE pgss_test(1);
DEALLOCATE pgss_test;
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
-- CRUD: INSERT SELECT UPDATE DELETE on test table
--
SELECT pg_stat_statements_reset();
-- utility "create table" should not be shown
CREATE TEMP TABLE test (a int, b char(20));
INSERT INTO test VALUES(generate_series(1, 10), 'aaa');
UPDATE test SET b = 'bbb' WHERE a > 7;
DELETE FROM test WHERE a > 9;
-- explicit transaction
BEGIN;
UPDATE test SET b = '111' WHERE a = 1 ;
COMMIT;
BEGIN \;
UPDATE test SET b = '222' WHERE a = 2 \;
COMMIT ;
UPDATE test SET b = '333' WHERE a = 3 \;
UPDATE test SET b = '444' WHERE a = 4 ;
BEGIN \;
UPDATE test SET b = '555' WHERE a = 5 \;
UPDATE test SET b = '666' WHERE a = 6 \;
COMMIT ;
-- many INSERT values
INSERT INTO test (a, b) VALUES (1, 'a'), (2, 'b'), (3, 'c');
-- SELECT with constants
SELECT * FROM test WHERE a > 5 ORDER BY a ;
SELECT *
FROM test
WHERE a > 9
ORDER BY a ;
-- SELECT without constants
SELECT * FROM test ORDER BY a;
-- SELECT with IN clause
SELECT * FROM test WHERE a IN (1, 2, 3, 4, 5);
SELECT query, calls, rows 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();
SELECT 1 AS "one";
SELECT 1 + 1 AS "two";
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
-- pg_stat_statements.track = top
--
SET pg_stat_statements.track = 'top';
SELECT pg_stat_statements_reset();
DO LANGUAGE plpgsql $$
BEGIN
-- this is a SELECT
PERFORM 'hello world'::TEXT;
END;
$$;
-- 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(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 query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
-- pg_stat_statements.track = all
--
SET pg_stat_statements.track = 'all';
SELECT pg_stat_statements_reset();
-- we drop and recreate the functions to avoid any caching funnies
DROP FUNCTION PLUS_ONE(INTEGER);
DROP FUNCTION PLUS_TWO(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 query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
-- utility commands
--
SET pg_stat_statements.track_utility = TRUE;
SELECT pg_stat_statements_reset();
SELECT 1;
CREATE INDEX test_b ON test(b);
DROP TABLE test \;
DROP TABLE IF EXISTS test \;
DROP FUNCTION PLUS_ONE(INTEGER);
DROP TABLE IF EXISTS test \;
DROP TABLE IF EXISTS test \;
DROP FUNCTION IF EXISTS PLUS_ONE(INTEGER);
DROP FUNCTION PLUS_TWO(INTEGER);
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
DROP EXTENSION pg_stat_statements;