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2c7ea57e56
This reverts a sequence of commits, implementing features related to logical decoding and replication of sequences: -0da92dc530-80901b3291-b779d7d8fd-d5ed9da41d-a180c2b34d-75b1521dae-2d2232933b-002c9dd97a-05843b1aa4The implementation has issues, mostly due to combining transactional and non-transactional behavior of sequences. It's not clear how this could be fixed, but it'll require reworking significant part of the patch. Discussion: https://postgr.es/m/95345a19-d508-63d1-860a-f5c2f41e8d40@enterprisedb.com
88 lines
2.3 KiB
Plaintext
88 lines
2.3 KiB
Plaintext
-- predictability
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SET synchronous_commit = on;
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-- fail because we're creating a slot while in an xact with xid
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BEGIN;
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SELECT pg_current_xact_id() = '0';
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?column?
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----------
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f
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(1 row)
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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ERROR: cannot create logical replication slot in transaction that has performed writes
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ROLLBACK;
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-- fail because we're creating a slot while in a subxact whose topxact has an xid
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BEGIN;
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SELECT pg_current_xact_id() = '0';
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?column?
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----------
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f
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(1 row)
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SAVEPOINT barf;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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ERROR: cannot create logical replication slot in transaction that has performed writes
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ROLLBACK TO SAVEPOINT barf;
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ROLLBACK;
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-- succeed, outside tx.
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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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SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
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?column?
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----------
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stop
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(1 row)
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-- succeed, in tx without xid.
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BEGIN;
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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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COMMIT;
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CREATE TABLE nobarf(id serial primary key, data text);
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INSERT INTO nobarf(data) VALUES('1');
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-- decoding works in transaction with xid
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BEGIN;
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SELECT pg_current_xact_id() = '0';
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?column?
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----------
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f
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(1 row)
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-- don't show yet, haven't committed
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INSERT INTO nobarf(data) VALUES('2');
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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.nobarf: INSERT: id[integer]:1 data[text]:'1'
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COMMIT
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(3 rows)
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COMMIT;
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INSERT INTO nobarf(data) VALUES('3');
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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.nobarf: INSERT: id[integer]:2 data[text]:'2'
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COMMIT
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BEGIN
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table public.nobarf: INSERT: id[integer]:3 data[text]:'3'
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COMMIT
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(6 rows)
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SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
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?column?
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----------
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stop
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(1 row)
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