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d6fa44fce7
The regression tests for contrib/test_decoding regularly failed on postgres instances that were very slow. Either because the hardware itself was slow or because very expensive debugging options like CLOBBER_CACHE_ALWAYS were used. The reason they failed was just that some additional transactions were decoded. Analyze and vacuum, triggered by autovac. To fix just add a option to test_decoding to only display transactions in which a change was actually displayed. That's not pretty because it removes information from the tests; but better than constantly failing tests in very likely harmless ways. Backpatch to 9.4 where logical decoding was introduced. Discussion: 20140629142511.GA26930@awork2.anarazel.de
51 lines
1.5 KiB
PL/PgSQL
51 lines
1.5 KiB
PL/PgSQL
-- predictability
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SET synchronous_commit = on;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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CREATE TABLE test_prepared1(id int);
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CREATE TABLE test_prepared2(id int);
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-- test simple successful use of a prepared xact
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BEGIN;
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INSERT INTO test_prepared1 VALUES (1);
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PREPARE TRANSACTION 'test_prepared#1';
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COMMIT PREPARED 'test_prepared#1';
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INSERT INTO test_prepared1 VALUES (2);
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-- test abort of a prepared xact
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BEGIN;
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INSERT INTO test_prepared1 VALUES (3);
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PREPARE TRANSACTION 'test_prepared#2';
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ROLLBACK PREPARED 'test_prepared#2';
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INSERT INTO test_prepared1 VALUES (4);
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-- test prepared xact containing ddl
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BEGIN;
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INSERT INTO test_prepared1 VALUES (5);
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ALTER TABLE test_prepared1 ADD COLUMN data text;
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INSERT INTO test_prepared1 VALUES (6, 'frakbar');
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PREPARE TRANSACTION 'test_prepared#3';
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-- test that we decode correctly while an uncommitted prepared xact
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-- with ddl exists.
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-- separate table because of the lock from the ALTER
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-- this will come before the '5' row above, as this commits before it.
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INSERT INTO test_prepared2 VALUES (7);
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COMMIT PREPARED 'test_prepared#3';
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-- make sure stuff still works
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INSERT INTO test_prepared1 VALUES (8);
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INSERT INTO test_prepared2 VALUES (9);
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-- cleanup
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DROP TABLE test_prepared1;
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DROP TABLE test_prepared2;
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-- show results
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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SELECT pg_drop_replication_slot('regression_slot');
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