mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-28 06:11:49 +02:00
a1999a01bb
Combo CIDs were referred in the code comments using different terms across various places of the code, so unify a bit the term used with what is currently in use in some of the READMEs. Author: "Hou, Zhijie" Discussion: https://postgr.es/m/1d42865c91404f46af4562532fdbea31@G08CNEXMBPEKD05.g08.fujitsu.local
112 lines
2.8 KiB
PL/PgSQL
112 lines
2.8 KiB
PL/PgSQL
--
|
|
-- Tests for some likely failure cases with combo cmin/cmax mechanism
|
|
--
|
|
CREATE TEMP TABLE combocidtest (foobar int);
|
|
|
|
BEGIN;
|
|
|
|
-- a few dummy ops to push up the CommandId counter
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
|
|
INSERT INTO combocidtest VALUES (1);
|
|
INSERT INTO combocidtest VALUES (2);
|
|
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
SAVEPOINT s1;
|
|
|
|
UPDATE combocidtest SET foobar = foobar + 10;
|
|
|
|
-- here we should see only updated tuples
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
ROLLBACK TO s1;
|
|
|
|
-- now we should see old tuples, but with combo CIDs starting at 0
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
COMMIT;
|
|
|
|
-- combo data is not there anymore, but should still see tuples
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
-- Test combo CIDs with portals
|
|
BEGIN;
|
|
|
|
INSERT INTO combocidtest VALUES (333);
|
|
|
|
DECLARE c CURSOR FOR SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
DELETE FROM combocidtest;
|
|
|
|
FETCH ALL FROM c;
|
|
|
|
ROLLBACK;
|
|
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
-- check behavior with locked tuples
|
|
BEGIN;
|
|
|
|
-- a few dummy ops to push up the CommandId counter
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
INSERT INTO combocidtest SELECT 1 LIMIT 0;
|
|
|
|
INSERT INTO combocidtest VALUES (444);
|
|
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
SAVEPOINT s1;
|
|
|
|
-- this doesn't affect cmin
|
|
SELECT ctid,cmin,* FROM combocidtest FOR UPDATE;
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
-- but this does
|
|
UPDATE combocidtest SET foobar = foobar + 10;
|
|
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
ROLLBACK TO s1;
|
|
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
COMMIT;
|
|
|
|
SELECT ctid,cmin,* FROM combocidtest;
|
|
|
|
-- test for bug reported in
|
|
-- CABRT9RC81YUf1=jsmWopcKJEro=VoeG2ou6sPwyOUTx_qteRsg@mail.gmail.com
|
|
CREATE TABLE IF NOT EXISTS testcase(
|
|
id int PRIMARY KEY,
|
|
balance numeric
|
|
);
|
|
INSERT INTO testcase VALUES (1, 0);
|
|
BEGIN;
|
|
SELECT * FROM testcase WHERE testcase.id = 1 FOR UPDATE;
|
|
UPDATE testcase SET balance = balance + 400 WHERE id=1;
|
|
SAVEPOINT subxact;
|
|
UPDATE testcase SET balance = balance - 100 WHERE id=1;
|
|
ROLLBACK TO SAVEPOINT subxact;
|
|
-- should return one tuple
|
|
SELECT * FROM testcase WHERE id = 1 FOR UPDATE;
|
|
ROLLBACK;
|
|
DROP TABLE testcase;
|