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pg_stat_statements: track number of rows processed by some utility commands.

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This commit makes pg_stat_statements track the total number
of rows retrieved or affected by CREATE TABLE AS, SELECT INTO,
CREATE MATERIALIZED VIEW and FETCH commands.

Suggested-by: Pascal Legrand
Author: Fujii Masao
Reviewed-by: Asif Rehman
Discussion: https://postgr.es/m/1584293755198-0.post@n3.nabble.com
This commit is contained in:
Fujii Masao
2020-07-29 23:21:55 +09:00
parent b5310e4ff6
commit 6023b7ea71
3 changed files with 102 additions and 1 deletions
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27
contrib/pg_stat_statements/sql/pg_stat_statements.sql
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@ -250,6 +250,30 @@ DROP FUNCTION PLUS_TWO(INTEGER);
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
-- Track the total number of rows retrieved or affected by the utility
-- commands of COPY, FETCH, CREATE TABLE AS, CREATE MATERIALIZED VIEW
-- and SELECT INTO
--
SELECT pg_stat_statements_reset();
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;
11 copy
12 copy
13 copy
\.
CREATE MATERIALIZED VIEW pgss_matv AS SELECT * FROM pgss_ctas;
BEGIN;
DECLARE pgss_cursor CURSOR FOR SELECT * FROM pgss_matv;
FETCH NEXT pgss_cursor;
FETCH FORWARD 5 pgss_cursor;
FETCH FORWARD ALL pgss_cursor;
COMMIT;
SELECT query, plans, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
-- Track user activity and reset them
--
@ -313,6 +337,9 @@ SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--
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