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PG-320: Removal of state columnns from pgsm view.

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We are concerned with finished queries in pg_stat_monitor, so state and
state_code columns were removed from the pg_stat_monitor_view as we only
list finished queries on it.

Removed state regression as it is not necessary anymore.

Also, this allowed us to remove the call to pgss_store on ExecutorStart,
which just updated query state to EXEC, thus saving some CPU.
This commit is contained in:
Diego Fronza
2022-01-05 16:32:02 -03:00
parent eaa9c08e24
commit 8a94129848
21 changed files with 177 additions and 306 deletions
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11
regression/expected/application_name.out
View File

@@ -12,12 +12,11 @@ SELECT 1 AS num;
(1 row)
SELECT query,application_name FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | application_name
-------------------------------------------------------------------------------+-----------------------------
SELECT $1 AS num | pg_regress/application_name
SELECT pg_stat_monitor_reset() | pg_regress/application_name
SELECT query,application_name FROM pg_stat_monitor ORDER BY query COLLATE "C" | pg_regress/application_name
(3 rows)
query | application_name
--------------------------------+-----------------------------
SELECT $1 AS num | pg_regress/application_name
SELECT pg_stat_monitor_reset() | pg_regress/application_name
(2 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

7
regression/expected/basic.out
View File

@@ -12,12 +12,11 @@ SELECT 1 AS num;
(1 row)
SELECT query FROM pg_stat_monitor ORDER BY query COLLATE "C";
query
--------------------------------------------------------------
query
--------------------------------
SELECT $1 AS num
SELECT pg_stat_monitor_reset()
SELECT query FROM pg_stat_monitor ORDER BY query COLLATE "C"
(3 rows)
(2 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

29
regression/expected/cmd_type.out
View File

@@ -25,21 +25,20 @@ TRUNCATE t1;
DROP TABLE t1;
DROP TABLE t2;
SELECT query, cmd_type, cmd_type_text FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | cmd_type | cmd_type_text
----------------------------------------------------------------------------------------+----------+---------------
CREATE TABLE t1 (a INTEGER) | 0 |
CREATE TABLE t2 (b INTEGER) | 0 |
DELETE FROM t1 | 4 | DELETE
DROP TABLE t1 | 0 |
DROP TABLE t2 | 0 |
INSERT INTO t1 VALUES($1) | 3 | INSERT
SELECT a FROM t1 | 1 | SELECT
SELECT b FROM t2 FOR UPDATE | 1 | SELECT
SELECT pg_stat_monitor_reset() | 1 | SELECT
SELECT query, cmd_type, cmd_type_text FROM pg_stat_monitor ORDER BY query COLLATE "C" | 1 | SELECT
TRUNCATE t1 | 0 |
UPDATE t1 SET a = $1 | 2 | UPDATE
(12 rows)
query | cmd_type | cmd_type_text
--------------------------------+----------+---------------
CREATE TABLE t1 (a INTEGER) | 0 |
CREATE TABLE t2 (b INTEGER) | 0 |
DELETE FROM t1 | 4 | DELETE
DROP TABLE t1 | 0 |
DROP TABLE t2 | 0 |
INSERT INTO t1 VALUES($1) | 3 | INSERT
SELECT a FROM t1 | 1 | SELECT
SELECT b FROM t2 FOR UPDATE | 1 | SELECT
SELECT pg_stat_monitor_reset() | 1 | SELECT
TRUNCATE t1 | 0 |
UPDATE t1 SET a = $1 | 2 | UPDATE
(11 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

6
regression/expected/counters.out
View File

@@ -40,8 +40,7 @@ SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
---------------------------------------------------------------------------------+-------
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a | 4
SELECT pg_stat_monitor_reset() | 1
SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C" | 1
(3 rows)
(2 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -70,7 +69,6 @@ SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
---------------------------------------------------------------------------------------------------+-------
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a | 1000
SELECT pg_stat_monitor_reset() | 1
SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C" | 1
do $$ +| 1
declare +|
n integer:= 1; +|
@@ -81,7 +79,7 @@ SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
n := n + 1; +|
end loop; +|
end $$ |
(4 rows)
(3 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

7
regression/expected/database.out
View File

@@ -28,13 +28,12 @@ SELECT * FROM t3,t4 WHERE t3.c = t4.d;
\c contrib_regression
SELECT datname, query FROM pg_stat_monitor ORDER BY query COLLATE "C";
datname | query
--------------------+-----------------------------------------------------------------------
datname | query
--------------------+---------------------------------------
db1 | SELECT * FROM t1,t2 WHERE t1.a = t2.b
db2 | SELECT * FROM t3,t4 WHERE t3.c = t4.d
contrib_regression | SELECT datname, query FROM pg_stat_monitor ORDER BY query COLLATE "C"
contrib_regression | SELECT pg_stat_monitor_reset()
(4 rows)
(3 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

31
regression/expected/error.out
View File

@@ -21,22 +21,21 @@ RAISE WARNING 'warning message';
END $$;
WARNING: warning message
SELECT query, elevel, sqlcode, message FROM pg_stat_monitor ORDER BY query COLLATE "C",elevel;
query | elevel | sqlcode | message
-----------------------------------------------------------------------------------------------+--------+---------+-----------------------------------
ELECET * FROM unknown; | 20 | 42601 | syntax error at or near "ELECET"
SELECT * FROM unknown; | 20 | 42P01 | relation "unknown" does not exist
SELECT 1/0; | 20 | 22012 | division by zero
SELECT pg_stat_monitor_reset() | 0 | |
SELECT query, elevel, sqlcode, message FROM pg_stat_monitor ORDER BY query COLLATE "C",elevel | 0 | |
do $$ +| 0 | |
BEGIN +| | |
RAISE WARNING 'warning message'; +| | |
END $$ | | |
do $$ +| 19 | 01000 | warning message
BEGIN +| | |
RAISE WARNING 'warning message'; +| | |
END $$; | | |
(7 rows)
query | elevel | sqlcode | message
----------------------------------+--------+---------+-----------------------------------
ELECET * FROM unknown; | 20 | 42601 | syntax error at or near "ELECET"
SELECT * FROM unknown; | 20 | 42P01 | relation "unknown" does not exist
SELECT 1/0; | 20 | 22012 | division by zero
SELECT pg_stat_monitor_reset() | 0 | |
do $$ +| 0 | |
BEGIN +| | |
RAISE WARNING 'warning message';+| | |
END $$ | | |
do $$ +| 19 | 01000 | warning message
BEGIN +| | |
RAISE WARNING 'warning message';+| | |
END $$; | | |
(6 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

31
regression/expected/error_1.out
View File

@@ -21,22 +21,21 @@ RAISE WARNING 'warning message';
END $$;
WARNING: warning message
SELECT query, elevel, sqlcode, message FROM pg_stat_monitor ORDER BY query COLLATE "C",elevel;
query | elevel | sqlcode | message
-----------------------------------------------------------------------------------------------+--------+---------+-----------------------------------
ELECET * FROM unknown; | 21 | 42601 | syntax error at or near "ELECET"
SELECT * FROM unknown; | 21 | 42P01 | relation "unknown" does not exist
SELECT 1/0; | 21 | 22012 | division by zero
SELECT pg_stat_monitor_reset() | 0 | |
SELECT query, elevel, sqlcode, message FROM pg_stat_monitor ORDER BY query COLLATE "C",elevel | 0 | |
do $$ +| 0 | |
BEGIN +| | |
RAISE WARNING 'warning message'; +| | |
END $$ | | |
do $$ +| 19 | 01000 | warning message
BEGIN +| | |
RAISE WARNING 'warning message'; +| | |
END $$; | | |
(7 rows)
query | elevel | sqlcode | message
----------------------------------+--------+---------+-----------------------------------
ELECET * FROM unknown; | 21 | 42601 | syntax error at or near "ELECET"
SELECT * FROM unknown; | 21 | 42P01 | relation "unknown" does not exist
SELECT 1/0; | 21 | 22012 | division by zero
SELECT pg_stat_monitor_reset() | 0 | |
do $$ +| 0 | |
BEGIN +| | |
RAISE WARNING 'warning message';+| | |
END $$ | | |
do $$ +| 19 | 01000 | warning message
BEGIN +| | |
RAISE WARNING 'warning message';+| | |
END $$; | | |
(6 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

64
regression/expected/relations.out
View File

@@ -37,15 +37,14 @@ SELECT * FROM foo1, foo2, foo3, foo4;
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
query | relations
-------------------------------------------------------------------------+---------------------------------------------------
SELECT * FROM foo1 | {public.foo1}
SELECT * FROM foo1, foo2 | {public.foo1,public.foo2}
SELECT * FROM foo1, foo2, foo3 | {public.foo1,public.foo2,public.foo3}
SELECT * FROM foo1, foo2, foo3, foo4 | {public.foo1,public.foo2,public.foo3,public.foo4}
SELECT pg_stat_monitor_reset() |
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C" | {public.pg_stat_monitor*,pg_catalog.pg_database}
(6 rows)
query | relations
--------------------------------------+---------------------------------------------------
SELECT * FROM foo1 | {public.foo1}
SELECT * FROM foo1, foo2 | {public.foo1,public.foo2}
SELECT * FROM foo1, foo2, foo3 | {public.foo1,public.foo2,public.foo3}
SELECT * FROM foo1, foo2, foo3, foo4 | {public.foo1,public.foo2,public.foo3,public.foo4}
SELECT pg_stat_monitor_reset() |
(5 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -89,15 +88,14 @@ SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3, sch4.foo4;
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
query | relations
-------------------------------------------------------------------------+--------------------------------------------------
SELECT * FROM sch1.foo1 | {sch1.foo1}
SELECT * FROM sch1.foo1, sch2.foo2 | {sch1.foo1,sch2.foo2}
SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3 | {sch1.foo1,sch2.foo2,sch3.foo3}
SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3, sch4.foo4 | {sch1.foo1,sch2.foo2,sch3.foo3,sch4.foo4}
SELECT pg_stat_monitor_reset() |
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C" | {public.pg_stat_monitor*,pg_catalog.pg_database}
(6 rows)
query | relations
----------------------------------------------------------+-------------------------------------------
SELECT * FROM sch1.foo1 | {sch1.foo1}
SELECT * FROM sch1.foo1, sch2.foo2 | {sch1.foo1,sch2.foo2}
SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3 | {sch1.foo1,sch2.foo2,sch3.foo3}
SELECT * FROM sch1.foo1, sch2.foo2, sch3.foo3, sch4.foo4 | {sch1.foo1,sch2.foo2,sch3.foo3,sch4.foo4}
SELECT pg_stat_monitor_reset() |
(5 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -122,13 +120,12 @@ SELECT * FROM sch1.foo1, sch2.foo2, foo1, foo2;
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query;
query | relations
-------------------------------------------------------------+--------------------------------------------------
SELECT * FROM sch1.foo1, foo1 | {sch1.foo1,public.foo1}
SELECT * FROM sch1.foo1, sch2.foo2, foo1, foo2 | {sch1.foo1,sch2.foo2,public.foo1,public.foo2}
SELECT pg_stat_monitor_reset() |
SELECT query, relations from pg_stat_monitor ORDER BY query | {public.pg_stat_monitor*,pg_catalog.pg_database}
(4 rows)
query | relations
------------------------------------------------+-----------------------------------------------
SELECT * FROM sch1.foo1, foo1 | {sch1.foo1,public.foo1}
SELECT * FROM sch1.foo1, sch2.foo2, foo1, foo2 | {sch1.foo1,sch2.foo2,public.foo1,public.foo2}
SELECT pg_stat_monitor_reset() |
(3 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
@@ -168,15 +165,14 @@ SELECT * FROM v1,v2,v3,v4;
(0 rows)
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C";
query | relations
-------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------
SELECT * FROM v1 | {public.v1*,public.foo1}
SELECT * FROM v1,v2 | {public.v1*,public.foo1,public.v2*,public.foo2}
SELECT * FROM v1,v2,v3 | {public.v1*,public.foo1,public.v2*,public.foo2,public.v3*,public.foo3}
SELECT * FROM v1,v2,v3,v4 | {public.v1*,public.foo1,public.v2*,public.foo2,public.v3*,public.foo3,public.v4*,public.foo4}
SELECT pg_stat_monitor_reset() |
SELECT query, relations from pg_stat_monitor ORDER BY query collate "C" | {public.pg_stat_monitor*,pg_catalog.pg_database}
(6 rows)
query | relations
--------------------------------+-----------------------------------------------------------------------------------------------
SELECT * FROM v1 | {public.v1*,public.foo1}
SELECT * FROM v1,v2 | {public.v1*,public.foo1,public.v2*,public.foo2}
SELECT * FROM v1,v2,v3 | {public.v1*,public.foo1,public.v2*,public.foo2,public.v3*,public.foo3}
SELECT * FROM v1,v2,v3,v4 | {public.v1*,public.foo1,public.v2*,public.foo2,public.v3*,public.foo3,public.v4*,public.foo4}
SELECT pg_stat_monitor_reset() |
(5 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

17
regression/expected/rows.out
View File

@@ -8540,15 +8540,14 @@ SELECt * FROM t2 WHERE b % 2 = 0;
(2500 rows)
SELECT query, rows_retrieved FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | rows_retrieved
------------------------------------------------------------------------------+----------------
SELECT * FROM t1 | 1000
SELECT * FROM t1 LIMIT $1 | 10
SELECT * FROM t2 | 5000
SELECT pg_stat_monitor_reset() | 1
SELECT query, rows_retrieved FROM pg_stat_monitor ORDER BY query COLLATE "C" | 0
SELECt * FROM t2 WHERE b % $1 = $2 | 2500
(6 rows)
query | rows_retrieved
-------------------------------------+----------------
SELECT * FROM t1 | 1000
SELECT * FROM t1 LIMIT $1 | 10
SELECT * FROM t2 | 5000
SELECT pg_stat_monitor_reset() | 1
SELECt * FROM t2 WHERE b % $1 = $2 | 2500
(5 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset

31
regression/expected/state.out
View File

@@ -1,31 +0,0 @@
CREATE EXTENSION pg_stat_monitor;
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT 1;
?column?
----------
1
(1 row)
SELECT 1/0; -- divide by zero
ERROR: division by zero
SELECT query, state_code, state FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | state_code | state
---------------------------------------------------------------------------------+------------+---------------------
SELECT $1 | 3 | FINISHED
SELECT 1/0; | 4 | FINISHED WITH ERROR
SELECT pg_stat_monitor_reset() | 3 | FINISHED
SELECT query, state_code, state FROM pg_stat_monitor ORDER BY query COLLATE "C" | 2 | ACTIVE
(4 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
DROP EXTENSION pg_stat_monitor;

6
regression/expected/tags.out
View File

@@ -16,8 +16,7 @@ SELECT query, comments FROM pg_stat_monitor ORDER BY query COLLATE "C";
---------------------------------------------------------------------------+----------
SELECT $1 AS num /* { "application", psql_app, "real_ip", 192.168.1.3) */ |
SELECT pg_stat_monitor_reset() |
SELECT query, comments FROM pg_stat_monitor ORDER BY query COLLATE "C" |
(3 rows)
(2 rows)
ALTER SYSTEM SET pg_stat_monitor.extract_comments TO 'yes';
SELECT pg_reload_conf();
@@ -49,8 +48,7 @@ SELECT query, comments FROM pg_stat_monitor ORDER BY query COLLATE "C";
---------------------------------------------------------------------------+----------------------------------------------------------
SELECT $1 AS num /* { "application", psql_app, "real_ip", 192.168.1.3) */ | /* { "application", psql_app, "real_ip", 192.168.1.3) */
SELECT pg_stat_monitor_reset() |
SELECT query, comments FROM pg_stat_monitor ORDER BY query COLLATE "C" |
(3 rows)
(2 rows)
ALTER SYSTEM SET pg_stat_monitor.extract_comments TO 'no';
SELECT pg_reload_conf();

68
regression/expected/top_query.out
View File

@@ -23,23 +23,22 @@ SELECT add2(1,2);
(1 row)
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | top_query
-------------------------------------------------------------------------+-----------
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS +|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C" |
(5 rows)
query | top_query
-------------------------------------------------------------+-----------
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS+|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
(4 rows)
ALTER SYSTEM SET pg_stat_monitor.track TO 'all';
SELECT pg_reload_conf();
@@ -78,24 +77,23 @@ SELECT add2(1,2);
(1 row)
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | top_query
-------------------------------------------------------------------------+--------------------
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS +|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT (select $1 + $2) | SELECT add2($1,$2)
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C" |
(6 rows)
query | top_query
-------------------------------------------------------------+--------------------
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS+|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT (select $1 + $2) | SELECT add2($1,$2)
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
(5 rows)
ALTER SYSTEM SET pg_stat_monitor.track TO 'top';
SELECT pg_reload_conf();

68
regression/expected/top_query_1.out
View File

@@ -23,23 +23,22 @@ SELECT add2(1,2);
(1 row)
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | top_query
-------------------------------------------------------------------------+-----------
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS +|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C" |
(5 rows)
query | top_query
-------------------------------------------------------------+-----------
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS+|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
(4 rows)
ALTER SYSTEM SET pg_stat_monitor.track TO 'all';
SELECT pg_reload_conf();
@@ -78,24 +77,23 @@ SELECT add2(1,2);
(1 row)
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | top_query
-------------------------------------------------------------------------+--------------------
(select $1 + $2) | SELECT add2($1,$2)
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS +|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
SELECT query, top_query FROM pg_stat_monitor ORDER BY query COLLATE "C" |
(6 rows)
query | top_query
-------------------------------------------------------------+--------------------
(select $1 + $2) | SELECT add2($1,$2)
CREATE OR REPLACE FUNCTION add(int, int) RETURNS INTEGER AS+|
$$ +|
BEGIN +|
return (select $1 + $2); +|
END; $$ language plpgsql |
CREATE OR REPLACE function add2(int, int) RETURNS int as +|
$$ +|
BEGIN +|
return add($1,$2); +|
END; +|
$$ language plpgsql |
SELECT add2($1,$2) |
SELECT pg_stat_monitor_reset() |
(5 rows)
ALTER SYSTEM SET pg_stat_monitor.track TO 'top';
SELECT pg_reload_conf();

8
regression/sql/state.sql
View File

@@ -1,8 +0,0 @@
CREATE EXTENSION pg_stat_monitor;
SELECT pg_stat_monitor_reset();
SELECT 1;
SELECT 1/0; -- divide by zero
SELECT query, state_code, state FROM pg_stat_monitor ORDER BY query COLLATE "C";
SELECT pg_stat_monitor_reset();
DROP EXTENSION pg_stat_monitor;