96 lines
3.6 KiB
PL/PgSQL
96 lines
3.6 KiB
PL/PgSQL
--
|
|
-- DMLs on test table
|
|
--
|
|
|
|
SET pg_stat_statements.track_utility = FALSE;
|
|
|
|
CREATE TEMP TABLE pgss_dml_tab (a int, b char(20));
|
|
|
|
INSERT INTO pgss_dml_tab VALUES(generate_series(1, 10), 'aaa');
|
|
UPDATE pgss_dml_tab SET b = 'bbb' WHERE a > 7;
|
|
DELETE FROM pgss_dml_tab WHERE a > 9;
|
|
|
|
-- explicit transaction
|
|
BEGIN;
|
|
UPDATE pgss_dml_tab SET b = '111' WHERE a = 1 ;
|
|
COMMIT;
|
|
|
|
BEGIN \;
|
|
UPDATE pgss_dml_tab SET b = '222' WHERE a = 2 \;
|
|
COMMIT ;
|
|
|
|
UPDATE pgss_dml_tab SET b = '333' WHERE a = 3 \;
|
|
UPDATE pgss_dml_tab SET b = '444' WHERE a = 4 ;
|
|
|
|
BEGIN \;
|
|
UPDATE pgss_dml_tab SET b = '555' WHERE a = 5 \;
|
|
UPDATE pgss_dml_tab SET b = '666' WHERE a = 6 \;
|
|
COMMIT ;
|
|
|
|
-- many INSERT values
|
|
INSERT INTO pgss_dml_tab (a, b) VALUES (1, 'a'), (2, 'b'), (3, 'c');
|
|
|
|
-- SELECT with constants
|
|
SELECT * FROM pgss_dml_tab WHERE a > 5 ORDER BY a ;
|
|
|
|
SELECT *
|
|
FROM pgss_dml_tab
|
|
WHERE a > 9
|
|
ORDER BY a ;
|
|
|
|
-- these two need to be done on a different table
|
|
-- SELECT without constants
|
|
SELECT * FROM pgss_dml_tab ORDER BY a;
|
|
|
|
-- SELECT with IN clause
|
|
SELECT * FROM pgss_dml_tab WHERE a IN (1, 2, 3, 4, 5);
|
|
|
|
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
|
|
-- MERGE
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
|
|
WHEN MATCHED THEN UPDATE SET b = st.b || st.a::text;
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
|
|
WHEN MATCHED THEN UPDATE SET b = pgss_dml_tab.b || st.a::text;
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
|
|
WHEN MATCHED AND length(st.b) > 1 THEN UPDATE SET b = pgss_dml_tab.b || st.a::text;
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
|
|
WHEN NOT MATCHED THEN INSERT (a, b) VALUES (0, NULL);
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
|
|
WHEN NOT MATCHED THEN INSERT VALUES (0, NULL); -- same as above
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
|
|
WHEN NOT MATCHED THEN INSERT (b, a) VALUES (NULL, 0);
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a)
|
|
WHEN NOT MATCHED THEN INSERT (a) VALUES (0);
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
|
|
WHEN MATCHED THEN DELETE;
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
|
|
WHEN MATCHED THEN DO NOTHING;
|
|
MERGE INTO pgss_dml_tab USING pgss_dml_tab st ON (st.a = pgss_dml_tab.a AND st.a >= 4)
|
|
WHEN NOT MATCHED THEN DO NOTHING;
|
|
|
|
DROP TABLE pgss_dml_tab;
|
|
|
|
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
|
|
-- check that [temp] table relation extensions are tracked as writes
|
|
CREATE TABLE pgss_extend_tab (a int, b text);
|
|
CREATE TEMP TABLE pgss_extend_temp_tab (a int, b text);
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|
|
INSERT INTO pgss_extend_tab (a, b) SELECT generate_series(1, 1000), 'something';
|
|
INSERT INTO pgss_extend_temp_tab (a, b) SELECT generate_series(1, 1000), 'something';
|
|
WITH sizes AS (
|
|
SELECT
|
|
pg_relation_size('pgss_extend_tab') / current_setting('block_size')::int8 AS rel_size,
|
|
pg_relation_size('pgss_extend_temp_tab') / current_setting('block_size')::int8 AS temp_rel_size
|
|
)
|
|
SELECT
|
|
SUM(local_blks_written) >= (SELECT temp_rel_size FROM sizes) AS temp_written_ok,
|
|
SUM(local_blks_dirtied) >= (SELECT temp_rel_size FROM sizes) AS temp_dirtied_ok,
|
|
SUM(shared_blks_written) >= (SELECT rel_size FROM sizes) AS written_ok,
|
|
SUM(shared_blks_dirtied) >= (SELECT rel_size FROM sizes) AS dirtied_ok
|
|
FROM pg_stat_statements;
|
|
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|