external
/
pg_stat_monitor
mirror of https://github.com/percona/pg_stat_monitor.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Issue - (#1): Initial Commit for PostgreSQL's (pg_stat_statement). 

The pg_stat_monitor is based on PostgreSQL-11's pg_stat_statement.
To keep track of the changes, this is the base code of
PostgreSQL's pg_stat_statement.

(commit = d898edf4f233a3ffe6a0da64179fc268a1d46200).
pull/9/head
Ibrar Ahmed 2019-11-19 11:34:34 +00:00
parent 97c67356ca
commit f70ad5ad48
15 changed files with 4007 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored
View File

@ -30,7 +30,6 @@
# Executables # Executables
*.exe *.exe
*.out
*.app *.app
*.i*86 *.i*86
*.x86_64 *.x86_64

31
Makefile Normal file
View File

@ -0,0 +1,31 @@
# contrib/pg_stat_statements/Makefile
MODULE_big = pg_stat_statements
OBJS = pg_stat_statements.o $(WIN32RES)
EXTENSION = pg_stat_statements
DATA = pg_stat_statements--1.4.sql pg_stat_statements--1.5--1.6.sql \
pg_stat_statements--1.4--1.5.sql pg_stat_statements--1.3--1.4.sql \
pg_stat_statements--1.2--1.3.sql pg_stat_statements--1.1--1.2.sql \
pg_stat_statements--1.0--1.1.sql \
pg_stat_statements--unpackaged--1.0.sql
PGFILEDESC = "pg_stat_statements - execution statistics of SQL statements"
LDFLAGS_SL += $(filter -lm, $(LIBS))
REGRESS_OPTS = --temp-config $(top_srcdir)/contrib/pg_stat_statements/pg_stat_statements.conf
REGRESS = pg_stat_statements
# Disabled because these tests require "shared_preload_libraries=pg_stat_statements",
# which typical installcheck users do not have (e.g. buildfarm clients).
NO_INSTALLCHECK = 1
ifdef USE_PGXS
PG_CONFIG = pg_config
PGXS := $(shell $(PG_CONFIG) --pgxs)
include $(PGXS)
else
subdir = contrib/pg_stat_statements
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
include $(top_srcdir)/contrib/contrib-global.mk
endif

398
expected/pg_stat_statements.out Normal file
View File

@ -0,0 +1,398 @@
CREATE EXTENSION pg_stat_statements;
--
-- simple and compound statements
--
SET pg_stat_statements.track_utility = FALSE;
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
WITH t(f) AS ( +| 1 | 2
VALUES ($1), ($2) +| |
) +| |
SELECT f FROM t ORDER BY f | |
select $1::jsonb ? $2 | 1 | 1
(11 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
UPDATE test SET b = $1 WHERE a = $2 | 6 | 6
UPDATE test SET b = $1 WHERE a > $2 | 1 | 3
(9 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
(4 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
(5 rows)
--
-- 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
(8 rows)
DROP EXTENSION pg_stat_statements;

42
pg_stat_statements--1.0--1.1.sql Normal file
View File

@ -0,0 +1,42 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.0--1.1.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.1'" to load this file. \quit
/* First we have to remove them from the extension */
ALTER EXTENSION pg_stat_statements DROP VIEW pg_stat_statements;
ALTER EXTENSION pg_stat_statements DROP FUNCTION pg_stat_statements();
/* Then we can drop them */
DROP VIEW pg_stat_statements;
DROP FUNCTION pg_stat_statements();
/* Now redefine */
CREATE FUNCTION pg_stat_statements(
OUT userid oid,
OUT dbid oid,
OUT query text,
OUT calls int8,
OUT total_time float8,
OUT rows int8,
OUT shared_blks_hit int8,
OUT shared_blks_read int8,
OUT shared_blks_dirtied int8,
OUT shared_blks_written int8,
OUT local_blks_hit int8,
OUT local_blks_read int8,
OUT local_blks_dirtied int8,
OUT local_blks_written int8,
OUT temp_blks_read int8,
OUT temp_blks_written int8,
OUT blk_read_time float8,
OUT blk_write_time float8
)
RETURNS SETOF record
AS 'MODULE_PATHNAME'
LANGUAGE C;
CREATE VIEW pg_stat_statements AS
SELECT * FROM pg_stat_statements();
GRANT SELECT ON pg_stat_statements TO PUBLIC;

43
pg_stat_statements--1.1--1.2.sql Normal file
View File

@ -0,0 +1,43 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.1--1.2.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.2'" to load this file. \quit
/* First we have to remove them from the extension */
ALTER EXTENSION pg_stat_statements DROP VIEW pg_stat_statements;
ALTER EXTENSION pg_stat_statements DROP FUNCTION pg_stat_statements();
/* Then we can drop them */
DROP VIEW pg_stat_statements;
DROP FUNCTION pg_stat_statements();
/* Now redefine */
CREATE FUNCTION pg_stat_statements(IN showtext boolean,
OUT userid oid,
OUT dbid oid,
OUT queryid bigint,
OUT query text,
OUT calls int8,
OUT total_time float8,
OUT rows int8,
OUT shared_blks_hit int8,
OUT shared_blks_read int8,
OUT shared_blks_dirtied int8,
OUT shared_blks_written int8,
OUT local_blks_hit int8,
OUT local_blks_read int8,
OUT local_blks_dirtied int8,
OUT local_blks_written int8,
OUT temp_blks_read int8,
OUT temp_blks_written int8,
OUT blk_read_time float8,
OUT blk_write_time float8
)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'pg_stat_statements_1_2'
LANGUAGE C STRICT VOLATILE;
CREATE VIEW pg_stat_statements AS
SELECT * FROM pg_stat_statements(true);
GRANT SELECT ON pg_stat_statements TO PUBLIC;

47
pg_stat_statements--1.2--1.3.sql Normal file
View File

@ -0,0 +1,47 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.2--1.3.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.3'" to load this file. \quit
/* First we have to remove them from the extension */
ALTER EXTENSION pg_stat_statements DROP VIEW pg_stat_statements;
ALTER EXTENSION pg_stat_statements DROP FUNCTION pg_stat_statements(boolean);
/* Then we can drop them */
DROP VIEW pg_stat_statements;
DROP FUNCTION pg_stat_statements(boolean);
/* Now redefine */
CREATE FUNCTION pg_stat_statements(IN showtext boolean,
OUT userid oid,
OUT dbid oid,
OUT queryid bigint,
OUT query text,
OUT calls int8,
OUT total_time float8,
OUT min_time float8,
OUT max_time float8,
OUT mean_time float8,
OUT stddev_time float8,
OUT rows int8,
OUT shared_blks_hit int8,
OUT shared_blks_read int8,
OUT shared_blks_dirtied int8,
OUT shared_blks_written int8,
OUT local_blks_hit int8,
OUT local_blks_read int8,
OUT local_blks_dirtied int8,
OUT local_blks_written int8,
OUT temp_blks_read int8,
OUT temp_blks_written int8,
OUT blk_read_time float8,
OUT blk_write_time float8
)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'pg_stat_statements_1_3'
LANGUAGE C STRICT VOLATILE;
CREATE VIEW pg_stat_statements AS
SELECT * FROM pg_stat_statements(true);
GRANT SELECT ON pg_stat_statements TO PUBLIC;

7
pg_stat_statements--1.3--1.4.sql Normal file
View File

@ -0,0 +1,7 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.3--1.4.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.4'" to load this file. \quit
ALTER FUNCTION pg_stat_statements_reset() PARALLEL SAFE;
ALTER FUNCTION pg_stat_statements(boolean) PARALLEL SAFE;

6
pg_stat_statements--1.4--1.5.sql Normal file
View File

@ -0,0 +1,6 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.4--1.5.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.5'" to load this file. \quit
GRANT EXECUTE ON FUNCTION pg_stat_statements_reset() TO pg_read_all_stats;

48
pg_stat_statements--1.4.sql Normal file
View File

@ -0,0 +1,48 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.4.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION pg_stat_statements" to load this file. \quit
-- Register functions.
CREATE FUNCTION pg_stat_statements_reset()
RETURNS void
AS 'MODULE_PATHNAME'
LANGUAGE C PARALLEL SAFE;
CREATE FUNCTION pg_stat_statements(IN showtext boolean,
OUT userid oid,
OUT dbid oid,
OUT queryid bigint,
OUT query text,
OUT calls int8,
OUT total_time float8,
OUT min_time float8,
OUT max_time float8,
OUT mean_time float8,
OUT stddev_time float8,
OUT rows int8,
OUT shared_blks_hit int8,
OUT shared_blks_read int8,
OUT shared_blks_dirtied int8,
OUT shared_blks_written int8,
OUT local_blks_hit int8,
OUT local_blks_read int8,
OUT local_blks_dirtied int8,
OUT local_blks_written int8,
OUT temp_blks_read int8,
OUT temp_blks_written int8,
OUT blk_read_time float8,
OUT blk_write_time float8
)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'pg_stat_statements_1_3'
LANGUAGE C STRICT VOLATILE PARALLEL SAFE;
-- Register a view on the function for ease of use.
CREATE VIEW pg_stat_statements AS
SELECT * FROM pg_stat_statements(true);
GRANT SELECT ON pg_stat_statements TO PUBLIC;
-- Don't want this to be available to non-superusers.
REVOKE ALL ON FUNCTION pg_stat_statements_reset() FROM PUBLIC;

7
pg_stat_statements--1.5--1.6.sql Normal file
View File

@ -0,0 +1,7 @@
/* contrib/pg_stat_statements/pg_stat_statements--1.5--1.6.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.6'" to load this file. \quit
-- Execution is only allowed for superusers, fixing issue with 1.5.
REVOKE EXECUTE ON FUNCTION pg_stat_statements_reset() FROM pg_read_all_stats;

8
pg_stat_statements--unpackaged--1.0.sql Normal file
View File

@ -0,0 +1,8 @@
/* contrib/pg_stat_statements/pg_stat_statements--unpackaged--1.0.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION pg_stat_statements FROM unpackaged" to load this file. \quit
ALTER EXTENSION pg_stat_statements ADD function pg_stat_statements_reset();
ALTER EXTENSION pg_stat_statements ADD function pg_stat_statements();
ALTER EXTENSION pg_stat_statements ADD view pg_stat_statements;

3166
pg_stat_statements.c Normal file
View File

File diff suppressed because it is too large Load Diff

1
pg_stat_statements.conf Normal file
View File

@ -0,0 +1 @@
shared_preload_libraries = 'pg_stat_statements'

5
pg_stat_statements.control Normal file
View File

@ -0,0 +1,5 @@
# pg_stat_statements extension
comment = 'track execution statistics of all SQL statements executed'
default_version = '1.6'
module_pathname = '$libdir/pg_stat_statements'
relocatable = true

198
sql/pg_stat_statements.sql Normal file
View File

@ -0,0 +1,198 @@
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;