143 lines
3.6 KiB
Plaintext
143 lines
3.6 KiB
Plaintext
--
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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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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 10 | 1
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(0,2) | 11 | 2
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(2 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,3) | 12 | 11
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(0,4) | 12 | 12
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(2 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 0 | 1
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(0,2) | 1 | 2
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(2 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 0 | 1
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(0,2) | 1 | 2
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(2 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 1 | 1
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(0,2) | 1 | 2
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(0,5) | 0 | 333
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(3 rows)
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ROLLBACK;
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SELECT ctid,cmin,* FROM combocidtest;
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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 1 | 1
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(0,2) | 1 | 2
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(2 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 1 | 1
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(0,2) | 1 | 2
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(0,6) | 10 | 444
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(3 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 1 | 1
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(0,2) | 1 | 2
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(0,6) | 10 | 444
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(3 rows)
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SELECT ctid,cmin,* FROM combocidtest;
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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 1 | 1
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(0,2) | 1 | 2
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(0,6) | 10 | 444
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(3 rows)
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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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ctid | cmin | foobar
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-------+------+--------
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(0,7) | 12 | 11
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(0,8) | 12 | 12
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(0,9) | 12 | 454
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(3 rows)
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ROLLBACK TO s1;
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SELECT ctid,cmin,* FROM combocidtest;
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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 12 | 1
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(0,2) | 12 | 2
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(0,6) | 0 | 444
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(3 rows)
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COMMIT;
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SELECT ctid,cmin,* FROM combocidtest;
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ctid | cmin | foobar
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-------+------+--------
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(0,1) | 12 | 1
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(0,2) | 12 | 2
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(0,6) | 0 | 444
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(3 rows)
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