2005-06-18 00:32:51 +02:00
|
|
|
--
|
|
|
|
-- PREPARED TRANSACTIONS (two-phase commit)
|
|
|
|
--
|
|
|
|
-- We can't readily test persistence of prepared xacts within the
|
|
|
|
-- regression script framework, unfortunately. Note that a crash
|
|
|
|
-- isn't really needed ... stopping and starting the postmaster would
|
|
|
|
-- be enough, but we can't even do that here.
|
|
|
|
|
|
|
|
|
|
|
|
-- create a simple table that we'll use in the tests
|
|
|
|
CREATE TABLE pxtest1 (foobar VARCHAR(10));
|
|
|
|
|
|
|
|
INSERT INTO pxtest1 VALUES ('aaa');
|
|
|
|
|
|
|
|
|
|
|
|
-- Test PREPARE TRANSACTION
|
|
|
|
BEGIN;
|
|
|
|
UPDATE pxtest1 SET foobar = 'bbb' WHERE foobar = 'aaa';
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
PREPARE TRANSACTION 'foo1';
|
|
|
|
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
-- Test pg_prepared_xacts system view
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
-- Test ROLLBACK PREPARED
|
|
|
|
ROLLBACK PREPARED 'foo1';
|
|
|
|
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
|
|
|
|
-- Test COMMIT PREPARED
|
|
|
|
BEGIN;
|
|
|
|
INSERT INTO pxtest1 VALUES ('ddd');
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
PREPARE TRANSACTION 'foo2';
|
|
|
|
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
COMMIT PREPARED 'foo2';
|
|
|
|
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
-- Test duplicate gids
|
|
|
|
BEGIN;
|
|
|
|
UPDATE pxtest1 SET foobar = 'eee' WHERE foobar = 'ddd';
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
PREPARE TRANSACTION 'foo3';
|
|
|
|
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
BEGIN;
|
|
|
|
INSERT INTO pxtest1 VALUES ('fff');
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
-- This should fail, because the gid foo3 is already in use
|
|
|
|
PREPARE TRANSACTION 'foo3';
|
|
|
|
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
ROLLBACK PREPARED 'foo3';
|
|
|
|
|
|
|
|
SELECT * FROM pxtest1;
|
|
|
|
|
|
|
|
-- Clean up
|
|
|
|
DROP TABLE pxtest1;
|
|
|
|
|
|
|
|
-- Test subtransactions
|
|
|
|
BEGIN;
|
|
|
|
CREATE TABLE pxtest2 (a int);
|
|
|
|
INSERT INTO pxtest2 VALUES (1);
|
|
|
|
SAVEPOINT a;
|
|
|
|
INSERT INTO pxtest2 VALUES (2);
|
|
|
|
ROLLBACK TO a;
|
|
|
|
SAVEPOINT b;
|
|
|
|
INSERT INTO pxtest2 VALUES (3);
|
|
|
|
PREPARE TRANSACTION 'regress-one';
|
|
|
|
|
|
|
|
CREATE TABLE pxtest3(fff int);
|
|
|
|
|
|
|
|
-- Test shared invalidation
|
|
|
|
BEGIN;
|
|
|
|
DROP TABLE pxtest3;
|
|
|
|
CREATE TABLE pxtest4 (a int);
|
|
|
|
INSERT INTO pxtest4 VALUES (1);
|
|
|
|
INSERT INTO pxtest4 VALUES (2);
|
|
|
|
DECLARE foo CURSOR FOR SELECT * FROM pxtest4;
|
|
|
|
-- Fetch 1 tuple, keeping the cursor open
|
|
|
|
FETCH 1 FROM foo;
|
|
|
|
PREPARE TRANSACTION 'regress-two';
|
|
|
|
|
|
|
|
-- No such cursor
|
|
|
|
FETCH 1 FROM foo;
|
|
|
|
|
|
|
|
-- Table doesn't exist, the creation hasn't been committed yet
|
|
|
|
SELECT * FROM pxtest2;
|
|
|
|
|
|
|
|
-- There should be two prepared transactions
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
-- pxtest3 should be locked because of the pending DROP
|
2008-04-29 01:48:16 +02:00
|
|
|
set statement_timeout to 2000;
|
2005-06-18 00:32:51 +02:00
|
|
|
SELECT * FROM pxtest3;
|
|
|
|
reset statement_timeout;
|
|
|
|
|
|
|
|
-- Disconnect, we will continue testing in a different backend
|
|
|
|
\c -
|
|
|
|
|
|
|
|
-- There should still be two prepared transactions
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
-- pxtest3 should still be locked because of the pending DROP
|
2008-04-29 01:48:16 +02:00
|
|
|
set statement_timeout to 2000;
|
2005-06-18 00:32:51 +02:00
|
|
|
SELECT * FROM pxtest3;
|
|
|
|
reset statement_timeout;
|
|
|
|
|
|
|
|
-- Commit table creation
|
|
|
|
COMMIT PREPARED 'regress-one';
|
|
|
|
\d pxtest2
|
|
|
|
SELECT * FROM pxtest2;
|
|
|
|
|
|
|
|
-- There should be one prepared transaction
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
-- Commit table drop
|
|
|
|
COMMIT PREPARED 'regress-two';
|
|
|
|
SELECT * FROM pxtest3;
|
|
|
|
|
|
|
|
-- There should be no prepared transactions
|
|
|
|
SELECT gid FROM pg_prepared_xacts;
|
|
|
|
|
|
|
|
-- Clean up
|
|
|
|
DROP TABLE pxtest2;
|
|
|
|
DROP TABLE pxtest4;
|