112 lines
2.8 KiB
PL/PgSQL
112 lines
2.8 KiB
PL/PgSQL
--
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-- Tests for some likely failure cases with combo cmin/cmax mechanism
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--
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CREATE TEMP TABLE combocidtest (foobar int);
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BEGIN;
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-- a few dummy ops to push up the CommandId counter
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest VALUES (1);
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INSERT INTO combocidtest VALUES (2);
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SELECT ctid,cmin,* FROM combocidtest;
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SAVEPOINT s1;
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UPDATE combocidtest SET foobar = foobar + 10;
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-- here we should see only updated tuples
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SELECT ctid,cmin,* FROM combocidtest;
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ROLLBACK TO s1;
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-- now we should see old tuples, but with combo CIDs starting at 0
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SELECT ctid,cmin,* FROM combocidtest;
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COMMIT;
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-- combo data is not there anymore, but should still see tuples
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SELECT ctid,cmin,* FROM combocidtest;
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-- Test combo CIDs with portals
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BEGIN;
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INSERT INTO combocidtest VALUES (333);
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DECLARE c CURSOR FOR SELECT ctid,cmin,* FROM combocidtest;
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DELETE FROM combocidtest;
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FETCH ALL FROM c;
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ROLLBACK;
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SELECT ctid,cmin,* FROM combocidtest;
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-- check behavior with locked tuples
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BEGIN;
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-- a few dummy ops to push up the CommandId counter
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest SELECT 1 LIMIT 0;
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INSERT INTO combocidtest VALUES (444);
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SELECT ctid,cmin,* FROM combocidtest;
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SAVEPOINT s1;
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-- this doesn't affect cmin
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SELECT ctid,cmin,* FROM combocidtest FOR UPDATE;
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SELECT ctid,cmin,* FROM combocidtest;
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-- but this does
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UPDATE combocidtest SET foobar = foobar + 10;
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SELECT ctid,cmin,* FROM combocidtest;
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ROLLBACK TO s1;
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SELECT ctid,cmin,* FROM combocidtest;
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COMMIT;
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SELECT ctid,cmin,* FROM combocidtest;
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-- test for bug reported in
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-- CABRT9RC81YUf1=jsmWopcKJEro=VoeG2ou6sPwyOUTx_qteRsg@mail.gmail.com
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CREATE TABLE IF NOT EXISTS testcase(
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id int PRIMARY KEY,
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balance numeric
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);
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INSERT INTO testcase VALUES (1, 0);
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BEGIN;
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SELECT * FROM testcase WHERE testcase.id = 1 FOR UPDATE;
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UPDATE testcase SET balance = balance + 400 WHERE id=1;
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SAVEPOINT subxact;
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UPDATE testcase SET balance = balance - 100 WHERE id=1;
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ROLLBACK TO SAVEPOINT subxact;
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-- should return one tuple
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SELECT * FROM testcase WHERE id = 1 FOR UPDATE;
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ROLLBACK;
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DROP TABLE testcase;
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