pyrox.dev
1CREATE TABLE table2_with_pk (a SERIAL, b VARCHAR(30), c TIMESTAMP NOT NULL, PRIMARY KEY(a, c));
2CREATE TABLE table2_without_pk (a SERIAL, b NUMERIC(5,2), c TEXT);
3
4SELECT 'init' FROM pg_create_logical_replication_slot('test_slot', 'wal2json');
5
6BEGIN;
7INSERT INTO table2_with_pk (b, c) VALUES('Backup and Restore', '2018-03-27 12:05:29.914496');
8INSERT INTO table2_with_pk (b, c) VALUES('Tuning', '2018-03-27 12:05:29.914496');
9INSERT INTO table2_with_pk (b, c) VALUES('Replication', '2018-03-27 12:05:29.914496');
10
11-- Avoid printing wal LSNs since they're not reproducible, so harder to assert on
12\o /dev/null
13SELECT pg_logical_emit_message(true, 'wal2json', 'this message will be delivered');
14SELECT pg_logical_emit_message(true, 'pgoutput', 'this message will be filtered');
15\o
16
17DELETE FROM table2_with_pk WHERE a < 3;
18\o /dev/null
19SELECT pg_logical_emit_message(false, 'wal2json', 'this non-transactional message will be delivered even if you rollback the transaction');
20\o
21
22INSERT INTO table2_without_pk (b, c) VALUES(2.34, 'Tapir');
23-- it is not added to stream because there isn't a pk or a replica identity
24UPDATE table2_without_pk SET c = 'Anta' WHERE c = 'Tapir';
25COMMIT;
26
27SELECT data FROM pg_logical_slot_get_changes('test_slot', NULL, NULL, 'pretty-print', '1', 'add-msg-prefixes', 'wal2json');
28SELECT 'stop' FROM pg_drop_replication_slot('test_slot');
29
30DROP TABLE table2_with_pk;
31DROP TABLE table2_without_pk;