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6ab1dbd26b
This is preliminary patch. It adds NOT NULL checking for the result of pg_stat_statements_reset() function. It is needed for upcoming patch "Track statement entry timestamp" that will change the result type of this function to the timestamp of a reset performed. Discussion: https://postgr.es/m/flat/72e80e7b160a6eb189df9ef6f068cce3765d37f8.camel%40moonset.ru Author: Andrei Zubkov Reviewed-by: Julien Rouhaud, Hayato Kuroda, Yuki Seino, Chengxi Sun Reviewed-by: Anton Melnikov, Darren Rush, Michael Paquier, Sergei Kornilov Reviewed-by: Alena Rybakina, Andrei Lepikhov
96 lines
3.6 KiB
PL/PgSQL
96 lines
3.6 KiB
PL/PgSQL
--
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-- DMLs on test table
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--
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SET pg_stat_statements.track_utility = FALSE;
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CREATE TEMP TABLE pgss_dml_tab (a int, b char(20));
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INSERT INTO pgss_dml_tab VALUES(generate_series(1, 10), 'aaa');
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UPDATE pgss_dml_tab SET b = 'bbb' WHERE a > 7;
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DELETE FROM pgss_dml_tab WHERE a > 9;
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-- explicit transaction
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BEGIN;
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UPDATE pgss_dml_tab SET b = '111' WHERE a = 1 ;
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COMMIT;
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BEGIN \;
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UPDATE pgss_dml_tab SET b = '222' WHERE a = 2 \;
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COMMIT ;
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UPDATE pgss_dml_tab SET b = '333' WHERE a = 3 \;
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UPDATE pgss_dml_tab SET b = '444' WHERE a = 4 ;
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BEGIN \;
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UPDATE pgss_dml_tab SET b = '555' WHERE a = 5 \;
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UPDATE pgss_dml_tab SET b = '666' WHERE a = 6 \;
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COMMIT ;
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-- many INSERT values
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INSERT INTO pgss_dml_tab (a, b) VALUES (1, 'a'), (2, 'b'), (3, 'c');
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-- SELECT with constants
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SELECT * FROM pgss_dml_tab WHERE a > 5 ORDER BY a ;
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SELECT *
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FROM pgss_dml_tab
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WHERE a > 9
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ORDER BY a ;
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-- these two need to be done on a different table
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-- SELECT without constants
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SELECT * FROM pgss_dml_tab ORDER BY a;
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-- SELECT with IN clause
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SELECT * FROM pgss_dml_tab WHERE a IN (1, 2, 3, 4, 5);
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SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
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SELECT pg_stat_statements_reset() IS NOT NULL AS t;
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-- MERGE
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
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WHEN MATCHED THEN UPDATE SET b = st.b || st.a::text;
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
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WHEN MATCHED THEN UPDATE SET b = pgss_dml_tab.b || st.a::text;
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
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WHEN MATCHED AND length(st.b) > 1 THEN UPDATE SET b = pgss_dml_tab.b || st.a::text;
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
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WHEN NOT MATCHED THEN INSERT (a, b) VALUES (0, NULL);
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
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WHEN NOT MATCHED THEN INSERT VALUES (0, NULL); -- same as above
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
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WHEN NOT MATCHED THEN INSERT (b, a) VALUES (NULL, 0);
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
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WHEN NOT MATCHED THEN INSERT (a) VALUES (0);
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
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WHEN MATCHED THEN DELETE;
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
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WHEN MATCHED THEN DO NOTHING;
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MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
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WHEN NOT MATCHED THEN DO NOTHING;
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DROP TABLE pgss_dml_tab;
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SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
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-- check that [temp] table relation extensions are tracked as writes
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CREATE TABLE pgss_extend_tab (a int, b text);
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CREATE TEMP TABLE pgss_extend_temp_tab (a int, b text);
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SELECT pg_stat_statements_reset() IS NOT NULL AS t;
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INSERT INTO pgss_extend_tab (a, b) SELECT generate_series(1, 1000), 'something';
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INSERT INTO pgss_extend_temp_tab (a, b) SELECT generate_series(1, 1000), 'something';
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WITH sizes AS (
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SELECT
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pg_relation_size('pgss_extend_tab') / current_setting('block_size')::int8 AS rel_size,
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pg_relation_size('pgss_extend_temp_tab') / current_setting('block_size')::int8 AS temp_rel_size
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)
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SELECT
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SUM(local_blks_written) >= (SELECT temp_rel_size FROM sizes) AS temp_written_ok,
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SUM(local_blks_dirtied) >= (SELECT temp_rel_size FROM sizes) AS temp_dirtied_ok,
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SUM(shared_blks_written) >= (SELECT rel_size FROM sizes) AS written_ok,
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SUM(shared_blks_dirtied) >= (SELECT rel_size FROM sizes) AS dirtied_ok
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FROM pg_stat_statements;
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SELECT pg_stat_statements_reset() IS NOT NULL AS t;
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