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cb3d2df90e
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
131 lines
3.6 KiB
Plaintext
131 lines
3.6 KiB
Plaintext
-- predictability
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SET synchronous_commit = on;
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-- setup
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CREATE ROLE lr_normal;
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CREATE ROLE lr_superuser SUPERUSER;
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CREATE ROLE lr_replication REPLICATION;
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CREATE TABLE lr_test(data text);
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-- superuser can control replication
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SET ROLE lr_superuser;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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?column?
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----------
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init
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(1 row)
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INSERT INTO lr_test VALUES('lr_superuser_init');
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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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data
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--------------------------------------------------------------
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BEGIN
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table public.lr_test: INSERT: data[text]:'lr_superuser_init'
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COMMIT
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(3 rows)
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SELECT pg_drop_replication_slot('regression_slot');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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RESET ROLE;
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-- replication user can control replication
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SET ROLE lr_replication;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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?column?
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----------
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init
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(1 row)
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INSERT INTO lr_test VALUES('lr_superuser_init');
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ERROR: permission denied for relation lr_test
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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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data
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------
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(0 rows)
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SELECT pg_drop_replication_slot('regression_slot');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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RESET ROLE;
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-- plain user *can't* can control replication
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SET ROLE lr_normal;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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ERROR: must be superuser or replication role to use replication slots
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INSERT INTO lr_test VALUES('lr_superuser_init');
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ERROR: permission denied for relation lr_test
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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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ERROR: must be superuser or replication role to use replication slots
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SELECT pg_drop_replication_slot('regression_slot');
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ERROR: must be superuser or replication role to use replication slots
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RESET ROLE;
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-- replication users can drop superuser created slots
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SET ROLE lr_superuser;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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?column?
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----------
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init
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(1 row)
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RESET ROLE;
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SET ROLE lr_replication;
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SELECT pg_drop_replication_slot('regression_slot');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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RESET ROLE;
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-- normal users can't drop existing slots
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SET ROLE lr_superuser;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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?column?
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----------
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init
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(1 row)
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RESET ROLE;
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SET ROLE lr_normal;
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SELECT pg_drop_replication_slot('regression_slot');
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ERROR: must be superuser or replication role to use replication slots
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RESET ROLE;
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-- all users can see existing slots
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SET ROLE lr_superuser;
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SELECT slot_name, plugin FROM pg_replication_slots;
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slot_name | plugin
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-----------------+---------------
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regression_slot | test_decoding
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(1 row)
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RESET ROLE;
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SET ROLE lr_replication;
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SELECT slot_name, plugin FROM pg_replication_slots;
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slot_name | plugin
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-----------------+---------------
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regression_slot | test_decoding
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(1 row)
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RESET ROLE;
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SET ROLE lr_normal;
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SELECT slot_name, plugin FROM pg_replication_slots;
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slot_name | plugin
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-----------------+---------------
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regression_slot | test_decoding
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(1 row)
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RESET ROLE;
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-- cleanup
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SELECT pg_drop_replication_slot('regression_slot');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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DROP ROLE lr_normal;
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DROP ROLE lr_superuser;
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DROP ROLE lr_replication;
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DROP TABLE lr_test;
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