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d4fe7437e53659c111db4e7602a017bd5dffefc8
postgres/contrib/pg_stat_statements/expected/pg_stat_statements.out
Tom Lane e6d9544681 Harden pg_stat_statements tests against CLOBBER_CACHE_ALWAYS. 
Turns out the buildfarm hasn't been testing this, which will soon change.

Julien Rouhaud, per report from me

Discussion: https://postgr.es/m/42557.1627229005@sss.pgh.pa.us
2021-07-25 23:25:15 -04:00

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CREATE EXTENSION pg_stat_statements;
--
-- simple and compound statements
--
SET pg_stat_statements.track_utility = FALSE;
SET pg_stat_statements.track_planning = TRUE;
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
SELECT 1 AS "int";
int
-----
1
(1 row)
SELECT 'hello'
-- multiline
AS "text";
text
-------
hello
(1 row)
SELECT 'world' AS "text";
text
-------
world
(1 row)
-- transaction
BEGIN;
SELECT 1 AS "int";
int
-----
1
(1 row)
SELECT 'hello' AS "text";
text
-------
hello
(1 row)
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 \;;
?column?
----------
5
(1 row)
-- 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;
i
---
1
2
(2 rows)
-- ? operator
select '{"a":1, "b":2}'::jsonb ? 'b';
?column?
----------
t
(1 row)
-- cte
WITH t(f) AS (
VALUES (1.0), (2.0)
)
SELECT f FROM t ORDER BY f;
f
-----
1.0
2.0
(2 rows)
-- prepared statement with parameter
PREPARE pgss_test (int) AS SELECT $1, 'test' LIMIT 1;
EXECUTE pgss_test(1);
?column? | ?column?
----------+----------
1 | test
(1 row)
DEALLOCATE pgss_test;
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
PREPARE pgss_test (int) AS SELECT $1, $2 LIMIT $3 | 1 | 1
SELECT $1 +| 4 | 4
+| |
AS "text" | |
SELECT $1 + $2 | 2 | 2
SELECT $1 + $2 + $3 AS "add" | 3 | 3
SELECT $1 AS "float" | 1 | 1
SELECT $1 AS "int" | 2 | 2
SELECT $1 AS i UNION SELECT $2 ORDER BY i | 1 | 2
SELECT $1 || $2 | 1 | 1
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
WITH t(f) AS ( +| 1 | 2
VALUES ($1), ($2) +| |
) +| |
SELECT f FROM t ORDER BY f | |
select $1::jsonb ? $2 | 1 | 1
(12 rows)
--
-- CRUD: INSERT SELECT UPDATE DELETE on test table
--
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
-- 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 ;
a | b
---+----------------------
6 | 666
7 | aaa
8 | bbb
9 | bbb
(4 rows)
SELECT *
FROM test
WHERE a > 9
ORDER BY a ;
a | b
---+---
(0 rows)
-- SELECT without constants
SELECT * FROM test ORDER BY a;
a | b
---+----------------------
1 | a
1 | 111
2 | b
2 | 222
3 | c
3 | 333
4 | 444
5 | 555
6 | 666
7 | aaa
8 | bbb
9 | bbb
(12 rows)
-- SELECT with IN clause
SELECT * FROM test WHERE a IN (1, 2, 3, 4, 5);
a | b
---+----------------------
1 | 111
2 | 222
3 | 333
4 | 444
5 | 555
1 | a
2 | b
3 | c
(8 rows)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
DELETE FROM test WHERE a > $1 | 1 | 1
INSERT INTO test (a, b) VALUES ($1, $2), ($3, $4), ($5, $6) | 1 | 3
INSERT INTO test VALUES(generate_series($1, $2), $3) | 1 | 10
SELECT * FROM test ORDER BY a | 1 | 12
SELECT * FROM test WHERE a > $1 ORDER BY a | 2 | 4
SELECT * FROM test WHERE a IN ($1, $2, $3, $4, $5) | 1 | 8
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
UPDATE test SET b = $1 WHERE a = $2 | 6 | 6
UPDATE test SET b = $1 WHERE a > $2 | 1 | 3
(10 rows)
--
-- INSERT, UPDATE, DELETE on test table to validate WAL generation metrics
--
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
-- utility "create table" should not be shown
CREATE TABLE pgss_test (a int, b char(20));
INSERT INTO pgss_test VALUES(generate_series(1, 10), 'aaa');
UPDATE pgss_test SET b = 'bbb' WHERE a > 7;
DELETE FROM pgss_test WHERE a > 9;
-- DROP test table
SET pg_stat_statements.track_utility = TRUE;
DROP TABLE pgss_test;
SET pg_stat_statements.track_utility = FALSE;
-- Check WAL is generated for the above statements
SELECT query, calls, rows,
wal_bytes > 0 as wal_bytes_generated,
wal_records > 0 as wal_records_generated,
wal_records = rows as wal_records_as_rows
FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows | wal_bytes_generated | wal_records_generated | wal_records_as_rows
-----------------------------------------------------------+-------+------+---------------------+-----------------------+---------------------
DELETE FROM pgss_test WHERE a > $1 | 1 | 1 | t | t | t
DROP TABLE pgss_test | 1 | 0 | t | t | f
INSERT INTO pgss_test VALUES(generate_series($1, $2), $3) | 1 | 10 | t | t | t
SELECT pg_stat_statements_reset() | 1 | 1 | f | f | f
SELECT query, calls, rows, +| 0 | 0 | f | f | t
wal_bytes > $1 as wal_bytes_generated, +| | | | |
wal_records > $2 as wal_records_generated, +| | | | |
wal_records = rows as wal_records_as_rows +| | | | |
FROM pg_stat_statements ORDER BY query COLLATE "C" | | | | |
SET pg_stat_statements.track_utility = FALSE | 1 | 0 | f | f | t
UPDATE pgss_test SET b = $1 WHERE a > $2 | 1 | 3 | t | t | t
(7 rows)
--
-- pg_stat_statements.track = none
--
SET pg_stat_statements.track = 'none';
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
SELECT 1 AS "one";
one
-----
1
(1 row)
SELECT 1 + 1 AS "two";
two
-----
2
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
-------+-------+------
(0 rows)
--
-- pg_stat_statements.track = top
--
SET pg_stat_statements.track = 'top';
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
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);
plus_two
----------
5
(1 row)
SELECT PLUS_TWO(7);
plus_two
----------
9
(1 row)
-- 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);
plus_one
----------
9
(1 row)
SELECT PLUS_ONE(10);
plus_one
----------
11
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
SELECT $1::TEXT | 1 | 1
SELECT PLUS_ONE($1) | 2 | 2
SELECT PLUS_TWO($1) | 2 | 2
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
(5 rows)
--
-- pg_stat_statements.track = all
--
SET pg_stat_statements.track = 'all';
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
-- 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);
plus_two
----------
1
(1 row)
SELECT PLUS_TWO(2);
plus_two
----------
4
(1 row)
-- 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);
plus_one
----------
4
(1 row)
SELECT PLUS_ONE(1);
plus_one
----------
2
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
SELECT (i + $2 + $3)::INTEGER | 2 | 2
SELECT (i + $2)::INTEGER LIMIT $3 | 2 | 2
SELECT PLUS_ONE($1) | 2 | 2
SELECT PLUS_TWO($1) | 2 | 2
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
(6 rows)
--
-- queries with locking clauses
--
CREATE TABLE pgss_a (id integer PRIMARY KEY);
CREATE TABLE pgss_b (id integer PRIMARY KEY, a_id integer REFERENCES pgss_a);
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
-- control query
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id;
id | id | a_id
----+----+------
(0 rows)
-- test range tables
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE;
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a;
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b;
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a, pgss_b; -- matches plain "FOR UPDATE"
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b, pgss_a;
id | id | a_id
----+----+------
(0 rows)
-- test strengths
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR NO KEY UPDATE;
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR SHARE;
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR KEY SHARE;
id | id | a_id
----+----+------
(0 rows)
-- test wait policies
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE NOWAIT;
id | id | a_id
----+----+------
(0 rows)
SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE SKIP LOCKED;
id | id | a_id
----+----+------
(0 rows)
SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C";
calls | query
-------+------------------------------------------------------------------------------------------
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR KEY SHARE
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR NO KEY UPDATE
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR SHARE
2 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE NOWAIT
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_a
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE OF pgss_b, pgss_a
1 | SELECT * FROM pgss_a JOIN pgss_b ON pgss_b.a_id = pgss_a.id FOR UPDATE SKIP LOCKED
0 | SELECT calls, query FROM pg_stat_statements ORDER BY query COLLATE "C"
1 | SELECT pg_stat_statements_reset()
(12 rows)
DROP TABLE pgss_a, pgss_b CASCADE;
--
-- utility commands
--
SET pg_stat_statements.track_utility = TRUE;
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
SELECT 1;
?column?
----------
1
(1 row)
CREATE INDEX test_b ON test(b);
DROP TABLE test \;
DROP TABLE IF EXISTS test \;
DROP FUNCTION PLUS_ONE(INTEGER);
NOTICE: table "test" does not exist, skipping
DROP TABLE IF EXISTS test \;
DROP TABLE IF EXISTS test \;
DROP FUNCTION IF EXISTS PLUS_ONE(INTEGER);
NOTICE: table "test" does not exist, skipping
NOTICE: table "test" does not exist, skipping
NOTICE: function plus_one(pg_catalog.int4) does not exist, skipping
DROP FUNCTION PLUS_TWO(INTEGER);
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
CREATE INDEX test_b ON test(b) | 1 | 0
DROP FUNCTION IF EXISTS PLUS_ONE(INTEGER) | 1 | 0
DROP FUNCTION PLUS_ONE(INTEGER) | 1 | 0
DROP FUNCTION PLUS_TWO(INTEGER) | 1 | 0
DROP TABLE IF EXISTS test | 3 | 0
DROP TABLE test | 1 | 0
SELECT $1 | 1 | 1
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
(9 rows)
--
-- Track the total number of rows retrieved or affected by the utility
-- commands of COPY, FETCH, CREATE TABLE AS, CREATE MATERIALIZED VIEW,
-- REFRESH MATERIALIZED VIEW and SELECT INTO
--
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
CREATE TABLE pgss_ctas AS SELECT a, 'ctas' b FROM generate_series(1, 10) a;
SELECT generate_series(1, 10) c INTO pgss_select_into;
COPY pgss_ctas (a, b) FROM STDIN;
CREATE MATERIALIZED VIEW pgss_matv AS SELECT * FROM pgss_ctas;
REFRESH MATERIALIZED VIEW pgss_matv;
BEGIN;
DECLARE pgss_cursor CURSOR FOR SELECT * FROM pgss_matv;
FETCH NEXT pgss_cursor;
a | b
---+------
1 | ctas
(1 row)
FETCH FORWARD 5 pgss_cursor;
a | b
---+------
2 | ctas
3 | ctas
4 | ctas
5 | ctas
6 | ctas
(5 rows)
FETCH FORWARD ALL pgss_cursor;
a | b
----+------
7 | ctas
8 | ctas
9 | ctas
10 | ctas
11 | copy
12 | copy
13 | copy
(7 rows)
COMMIT;
SELECT query, plans, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | plans | calls | rows
-------------------------------------------------------------------------------------+-------+-------+------
BEGIN | 0 | 1 | 0
COMMIT | 0 | 1 | 0
COPY pgss_ctas (a, b) FROM STDIN | 0 | 1 | 3
CREATE MATERIALIZED VIEW pgss_matv AS SELECT * FROM pgss_ctas | 0 | 1 | 13
CREATE TABLE pgss_ctas AS SELECT a, 'ctas' b FROM generate_series(1, 10) a | 0 | 1 | 10
DECLARE pgss_cursor CURSOR FOR SELECT * FROM pgss_matv | 0 | 1 | 0
FETCH FORWARD 5 pgss_cursor | 0 | 1 | 5
FETCH FORWARD ALL pgss_cursor | 0 | 1 | 7
FETCH NEXT pgss_cursor | 0 | 1 | 1
REFRESH MATERIALIZED VIEW pgss_matv | 0 | 1 | 13
SELECT generate_series(1, 10) c INTO pgss_select_into | 0 | 1 | 10
SELECT pg_stat_statements_reset() | 0 | 1 | 1
SELECT query, plans, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 1 | 0 | 0
(13 rows)
--
-- Track user activity and reset them
--
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
CREATE ROLE regress_stats_user1;
CREATE ROLE regress_stats_user2;
SET ROLE regress_stats_user1;
SELECT 1 AS "ONE";
ONE
-----
1
(1 row)
SELECT 1+1 AS "TWO";
TWO
-----
2
(1 row)
RESET ROLE;
SET ROLE regress_stats_user2;
SELECT 1 AS "ONE";
ONE
-----
1
(1 row)
SELECT 1+1 AS "TWO";
TWO
-----
2
(1 row)
RESET ROLE;
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
CREATE ROLE regress_stats_user1 | 1 | 0
CREATE ROLE regress_stats_user2 | 1 | 0
RESET ROLE | 2 | 0
SELECT $1 AS "ONE" | 1 | 1
SELECT $1 AS "ONE" | 1 | 1
SELECT $1+$2 AS "TWO" | 1 | 1
SELECT $1+$2 AS "TWO" | 1 | 1
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
SET ROLE regress_stats_user1 | 1 | 0
SET ROLE regress_stats_user2 | 1 | 0
(11 rows)
--
-- Don't reset anything if any of the parameter is NULL
--
SELECT pg_stat_statements_reset(NULL);
pg_stat_statements_reset
--------------------------
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
CREATE ROLE regress_stats_user1 | 1 | 0
CREATE ROLE regress_stats_user2 | 1 | 0
RESET ROLE | 2 | 0
SELECT $1 AS "ONE" | 1 | 1
SELECT $1 AS "ONE" | 1 | 1
SELECT $1+$2 AS "TWO" | 1 | 1
SELECT $1+$2 AS "TWO" | 1 | 1
SELECT pg_stat_statements_reset($1) | 1 | 1
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 1 | 11
SET ROLE regress_stats_user1 | 1 | 0
SET ROLE regress_stats_user2 | 1 | 0
(12 rows)
--
-- remove query ('SELECT $1+$2 AS "TWO"') executed by regress_stats_user2
-- in the current_database
--
SELECT pg_stat_statements_reset(
(SELECT r.oid FROM pg_roles AS r WHERE r.rolname = 'regress_stats_user2'),
(SELECT d.oid FROM pg_database As d where datname = current_database()),
(SELECT s.queryid FROM pg_stat_statements AS s
WHERE s.query = 'SELECT $1+$2 AS "TWO"' LIMIT 1));
pg_stat_statements_reset
--------------------------
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
----------------------------------------------------------------------------------+-------+------
CREATE ROLE regress_stats_user1 | 1 | 0
CREATE ROLE regress_stats_user2 | 1 | 0
RESET ROLE | 2 | 0
SELECT $1 AS "ONE" | 1 | 1
SELECT $1 AS "ONE" | 1 | 1
SELECT $1+$2 AS "TWO" | 1 | 1
SELECT pg_stat_statements_reset( +| 1 | 1
(SELECT r.oid FROM pg_roles AS r WHERE r.rolname = $1), +| |
(SELECT d.oid FROM pg_database As d where datname = current_database()),+| |
(SELECT s.queryid FROM pg_stat_statements AS s +| |
WHERE s.query = $2 LIMIT $3)) | |
SELECT pg_stat_statements_reset($1) | 1 | 1
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 2 | 23
SET ROLE regress_stats_user1 | 1 | 0
SET ROLE regress_stats_user2 | 1 | 0
(12 rows)
--
-- remove query ('SELECT $1 AS "ONE"') executed by two users
--
SELECT pg_stat_statements_reset(0,0,s.queryid)
FROM pg_stat_statements AS s WHERE s.query = 'SELECT $1 AS "ONE"';
pg_stat_statements_reset
--------------------------
(2 rows)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
----------------------------------------------------------------------------------+-------+------
CREATE ROLE regress_stats_user1 | 1 | 0
CREATE ROLE regress_stats_user2 | 1 | 0
RESET ROLE | 2 | 0
SELECT $1+$2 AS "TWO" | 1 | 1
SELECT pg_stat_statements_reset( +| 1 | 1
(SELECT r.oid FROM pg_roles AS r WHERE r.rolname = $1), +| |
(SELECT d.oid FROM pg_database As d where datname = current_database()),+| |
(SELECT s.queryid FROM pg_stat_statements AS s +| |
WHERE s.query = $2 LIMIT $3)) | |
SELECT pg_stat_statements_reset($1) | 1 | 1
SELECT pg_stat_statements_reset($1,$2,s.queryid) +| 1 | 2
FROM pg_stat_statements AS s WHERE s.query = $3 | |
SELECT pg_stat_statements_reset() | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 3 | 35
SET ROLE regress_stats_user1 | 1 | 0
SET ROLE regress_stats_user2 | 1 | 0
(11 rows)
--
-- remove query of a user (regress_stats_user1)
--
SELECT pg_stat_statements_reset(r.oid)
FROM pg_roles AS r WHERE r.rolname = 'regress_stats_user1';
pg_stat_statements_reset
--------------------------
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
----------------------------------------------------------------------------------+-------+------
CREATE ROLE regress_stats_user1 | 1 | 0
CREATE ROLE regress_stats_user2 | 1 | 0
RESET ROLE | 2 | 0
SELECT pg_stat_statements_reset( +| 1 | 1
(SELECT r.oid FROM pg_roles AS r WHERE r.rolname = $1), +| |
(SELECT d.oid FROM pg_database As d where datname = current_database()),+| |
(SELECT s.queryid FROM pg_stat_statements AS s +| |
WHERE s.query = $2 LIMIT $3)) | |
SELECT pg_stat_statements_reset($1) | 1 | 1
SELECT pg_stat_statements_reset($1,$2,s.queryid) +| 1 | 2
FROM pg_stat_statements AS s WHERE s.query = $3 | |
SELECT pg_stat_statements_reset() | 1 | 1
SELECT pg_stat_statements_reset(r.oid) +| 1 | 1
FROM pg_roles AS r WHERE r.rolname = $1 | |
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 4 | 46
SET ROLE regress_stats_user2 | 1 | 0
(10 rows)
--
-- reset all
--
SELECT pg_stat_statements_reset(0,0,0);
pg_stat_statements_reset
--------------------------
(1 row)
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
query | calls | rows
------------------------------------------------------------------------------+-------+------
SELECT pg_stat_statements_reset(0,0,0) | 1 | 1
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C" | 0 | 0
(2 rows)
--
-- cleanup
--
DROP ROLE regress_stats_user1;
DROP ROLE regress_stats_user2;
DROP MATERIALIZED VIEW pgss_matv;
DROP TABLE pgss_ctas;
DROP TABLE pgss_select_into;
--
-- [re]plan counting
--
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
CREATE TABLE test ();
PREPARE prep1 AS SELECT COUNT(*) FROM test;
EXECUTE prep1;
count
-------
0
(1 row)
EXECUTE prep1;
count
-------
0
(1 row)
EXECUTE prep1;
count
-------
0
(1 row)
ALTER TABLE test ADD COLUMN x int;
EXECUTE prep1;
count
-------
0
(1 row)
SELECT 42;
?column?
----------
42
(1 row)
SELECT 42;
?column?
----------
42
(1 row)
SELECT 42;
?column?
----------
42
(1 row)
SELECT query, plans, calls, rows FROM pg_stat_statements
WHERE query NOT LIKE 'PREPARE%' ORDER BY query COLLATE "C";
query | plans | calls | rows
----------------------------------------------------------+-------+-------+------
ALTER TABLE test ADD COLUMN x int | 0 | 1 | 0
CREATE TABLE test () | 0 | 1 | 0
SELECT $1 | 3 | 3 | 3
SELECT pg_stat_statements_reset() | 0 | 1 | 1
SELECT query, plans, calls, rows FROM pg_stat_statements+| 1 | 0 | 0
WHERE query NOT LIKE $1 ORDER BY query COLLATE "C" | | |
(5 rows)
-- for the prepared statement we expect at least one replan, but cache
-- invalidations could force more
SELECT query, plans >= 2 AND plans <= calls AS plans_ok, calls, rows FROM pg_stat_statements
WHERE query LIKE 'PREPARE%' ORDER BY query COLLATE "C";
query | plans_ok | calls | rows
--------------------------------------------+----------+-------+------
PREPARE prep1 AS SELECT COUNT(*) FROM test | t | 4 | 4
(1 row)
--
-- access to pg_stat_statements_info view
--
SELECT pg_stat_statements_reset();
pg_stat_statements_reset
--------------------------
(1 row)
SELECT dealloc FROM pg_stat_statements_info;
dealloc
---------
0
(1 row)
--
-- top level handling
--
SET pg_stat_statements.track = 'top';
DELETE FROM test;
DO $$
BEGIN
DELETE FROM test;
END;
$$ LANGUAGE plpgsql;
SELECT query, toplevel, plans, calls FROM pg_stat_statements WHERE query LIKE '%DELETE%' ORDER BY query COLLATE "C", toplevel;
query | toplevel | plans | calls
-----------------------+----------+-------+-------
DELETE FROM test | t | 1 | 1
DO $$ +| t | 0 | 1
BEGIN +| | |
DELETE FROM test;+| | |
END; +| | |
$$ LANGUAGE plpgsql | | |
(2 rows)
SET pg_stat_statements.track = 'all';
DELETE FROM test;
DO $$
BEGIN
DELETE FROM test;
END;
$$ LANGUAGE plpgsql;
SELECT query, toplevel, plans, calls FROM pg_stat_statements WHERE query LIKE '%DELETE%' ORDER BY query COLLATE "C", toplevel;
query | toplevel | plans | calls
-----------------------+----------+-------+-------
DELETE FROM test | f | 1 | 1
DELETE FROM test | t | 2 | 2
DO $$ +| t | 0 | 2
BEGIN +| | |
DELETE FROM test;+| | |
END; +| | |
$$ LANGUAGE plpgsql | | |
(3 rows)
-- FROM [ONLY]
CREATE TABLE tbl_inh(id integer);
CREATE TABLE tbl_inh_1() INHERITS (tbl_inh);
INSERT INTO tbl_inh_1 SELECT 1;
SELECT * FROM tbl_inh;
id
----
1
(1 row)
SELECT * FROM ONLY tbl_inh;
id
----
(0 rows)
SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%FROM%tbl_inh%';
count
-------
2
(1 row)
-- WITH TIES
CREATE TABLE limitoption AS SELECT 0 AS val FROM generate_series(1, 10);
SELECT *
FROM limitoption
WHERE val < 2
ORDER BY val
FETCH FIRST 2 ROWS WITH TIES;
val
-----
0
0
0
0
0
0
0
0
0
0
(10 rows)
SELECT *
FROM limitoption
WHERE val < 2
ORDER BY val
FETCH FIRST 2 ROW ONLY;
val
-----
0
0
(2 rows)
SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%FETCH FIRST%';
count
-------
2
(1 row)
-- GROUP BY [DISTINCT]
SELECT a, b, c
FROM (VALUES (1, 2, 3), (4, NULL, 6), (7, 8, 9)) AS t (a, b, c)
GROUP BY ROLLUP(a, b), rollup(a, c)
ORDER BY a, b, c;
a | b | c
---+---+---
1 | 2 | 3
1 | 2 |
1 | 2 |
1 | | 3
1 | | 3
1 | |
1 | |
1 | |
4 | | 6
4 | | 6
4 | | 6
4 | |
4 | |
4 | |
4 | |
4 | |
7 | 8 | 9
7 | 8 |
7 | 8 |
7 | | 9
7 | | 9
7 | |
7 | |
7 | |
| |
(25 rows)
SELECT a, b, c
FROM (VALUES (1, 2, 3), (4, NULL, 6), (7, 8, 9)) AS t (a, b, c)
GROUP BY DISTINCT ROLLUP(a, b), rollup(a, c)
ORDER BY a, b, c;
a | b | c
---+---+---
1 | 2 | 3
1 | 2 |
1 | | 3
1 | |
4 | | 6
4 | | 6
4 | |
4 | |
7 | 8 | 9
7 | 8 |
7 | | 9
7 | |
| |
(13 rows)
SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%GROUP BY%ROLLUP%';
count
-------
2
(1 row)
-- GROUPING SET agglevelsup
SELECT (
SELECT (
SELECT GROUPING(a,b) FROM (VALUES (1)) v2(c)
) FROM (VALUES (1,2)) v1(a,b) GROUP BY (a,b)
) FROM (VALUES(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
grouping
----------
0
0
0
(3 rows)
SELECT (
SELECT (
SELECT GROUPING(e,f) FROM (VALUES (1)) v2(c)
) FROM (VALUES (1,2)) v1(a,b) GROUP BY (a,b)
) FROM (VALUES(6,7)) v3(e,f) GROUP BY ROLLUP(e,f);
grouping
----------
3
0
1
(3 rows)
SELECT COUNT(*) FROM pg_stat_statements WHERE query LIKE '%SELECT GROUPING%';
count
-------
2
(1 row)
DROP EXTENSION pg_stat_statements;
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