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PG-186: Add support to monitor query execution plan.

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This requires refactoring of code to add this functionality. Along with
that this patch contains regression test cases.
This commit is contained in:
Ibrar Ahmed
2021-03-12 18:55:12 +00:00
parent 8f69daa5dd
commit 066162c3f6
34 changed files with 10234 additions and 1173 deletions
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93
regression/expected/counters.out Normal file
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CREATE EXTENSION pg_stat_monitor;
CREATE TABLE t1 (a INTEGER);
CREATE TABLE t2 (b INTEGER);
CREATE TABLE t3 (c INTEGER);
CREATE TABLE t4 (d INTEGER);
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
a | b | c | d
---+---+---+---
(0 rows)
SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | calls
----------------------------------------------------------------------------------+-------
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)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
do $$
declare
n integer:= 1;
begin
loop
PERFORM a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;
exit when n = 1000;
n := n + 1;
end loop;
end $$;
SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
query | calls
---------------------------------------------------------------------------------------------------+-------
SELECT $1 AS num | 1
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 n + $3 | 1
SELECT n = $3 | 1
SELECT pg_stat_monitor_reset(); | 1
SELECT query,calls FROM pg_stat_monitor ORDER BY query COLLATE "C"; | 1
do $$ +| 1
declare +|
n integer:= 1; +|
begin +|
loop +|
PERFORM a,b,c,d FROM t1, t2, t3, t4 WHERE t1.a = t2.b AND t3.c = t4.d ORDER BY a;+|
exit when n = 1000; +|
n := n + 1; +|
end loop; +|
end $$; |
(7 rows)
SELECT pg_stat_monitor_reset();
pg_stat_monitor_reset
-----------------------
(1 row)
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
DROP TABLE t4;
DROP EXTENSION pg_stat_monitor;