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Fix pg_stat_statements for MERGE

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We weren't jumbling the merge action list, so wildly different commands
would be considered to use the same query ID.  Add that, mention it in
the docs, and some test lines.

Backpatch to 15.

Author: Tatsu <bt22nakamorit@oss.nttdata.com>
Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://postgr.es/m/d87e391694db75a038abc3b2597828e8@oss.nttdata.com
This commit is contained in:
Alvaro Herrera
2022-09-27 10:44:42 +02:00
parent d1f95fa247
commit 72abf03b64
5 changed files with 77 additions and 5 deletions
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22
contrib/pg_stat_statements/sql/pg_stat_statements.sql
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@ -100,6 +100,28 @@ SELECT * FROM test ORDER BY a;
-- SELECT with IN clause
SELECT * FROM test WHERE a IN (1, 2, 3, 4, 5);
-- MERGE
MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
WHEN MATCHED THEN UPDATE SET b = st.b || st.a::text;
MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
WHEN MATCHED THEN UPDATE SET b = test.b || st.a::text;
MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
WHEN MATCHED AND length(st.b) > 1 THEN UPDATE SET b = test.b || st.a::text;
MERGE INTO test USING test st ON (st.a = test.a)
WHEN NOT MATCHED THEN INSERT (a, b) VALUES (0, NULL);
MERGE INTO test USING test st ON (st.a = test.a)
WHEN NOT MATCHED THEN INSERT VALUES (0, NULL); -- same as above
MERGE INTO test USING test st ON (st.a = test.a)
WHEN NOT MATCHED THEN INSERT (b, a) VALUES (NULL, 0);
MERGE INTO test USING test st ON (st.a = test.a)
WHEN NOT MATCHED THEN INSERT (a) VALUES (0);
MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
WHEN MATCHED THEN DELETE;
MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
WHEN MATCHED THEN DO NOTHING;
MERGE INTO test USING test st ON (st.a = test.a AND st.a >= 4)
WHEN NOT MATCHED THEN DO NOTHING;
SELECT query, calls, rows FROM pg_stat_statements ORDER BY query COLLATE "C";
--