43 lines
1.6 KiB
MySQL
43 lines
1.6 KiB
MySQL
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-- test that we can insert the result of a get_changes call into a
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-- logged relation. That's really not a good idea in practical terms,
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-- but provides a nice test.
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-- 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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-- slot works
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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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-- create some changes
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CREATE TABLE somechange(id serial primary key);
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INSERT INTO somechange DEFAULT VALUES;
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CREATE TABLE changeresult AS
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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 * FROM changeresult;
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INSERT INTO changeresult
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SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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INSERT INTO changeresult
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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 * FROM changeresult;
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DROP TABLE changeresult;
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DROP TABLE somechange;
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-- check calling logical decoding from pl/pgsql
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CREATE FUNCTION slot_changes_wrapper(slot_name name) RETURNS SETOF TEXT AS $$
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BEGIN
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RETURN QUERY
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SELECT data FROM pg_logical_slot_peek_changes(slot_name, NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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END$$ LANGUAGE plpgsql;
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SELECT * FROM slot_changes_wrapper('regression_slot');
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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 'stop' FROM pg_drop_replication_slot('regression_slot');
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