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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
commit | 6eb9c5a5657d1fe77b55cc261450f3538d35a94d (patch) | |
tree | 657d8194422a5daccecfd42d654b8a245ef7b4c8 /contrib/test_decoding/sql/decoding_into_rel.sql | |
parent | Initial commit. (diff) | |
download | postgresql-13-upstream.tar.xz postgresql-13-upstream.zip |
Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'contrib/test_decoding/sql/decoding_into_rel.sql')
-rw-r--r-- | contrib/test_decoding/sql/decoding_into_rel.sql | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/contrib/test_decoding/sql/decoding_into_rel.sql b/contrib/test_decoding/sql/decoding_into_rel.sql new file mode 100644 index 0000000..1068cec --- /dev/null +++ b/contrib/test_decoding/sql/decoding_into_rel.sql @@ -0,0 +1,42 @@ +-- test that we can insert the result of a get_changes call into a +-- logged relation. That's really not a good idea in practical terms, +-- but provides a nice test. + +-- predictability +SET synchronous_commit = on; + +SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding'); + +-- slot works +SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); + +-- create some changes +CREATE TABLE somechange(id serial primary key); +INSERT INTO somechange DEFAULT VALUES; + +CREATE TABLE changeresult AS + SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); + +SELECT * FROM changeresult; + +INSERT INTO changeresult + SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); +INSERT INTO changeresult + SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); + +SELECT * FROM changeresult; +DROP TABLE changeresult; +DROP TABLE somechange; + +-- check calling logical decoding from pl/pgsql +CREATE FUNCTION slot_changes_wrapper(slot_name name) RETURNS SETOF TEXT AS $$ +BEGIN + RETURN QUERY + SELECT data FROM pg_logical_slot_peek_changes(slot_name, NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); +END$$ LANGUAGE plpgsql; + +SELECT * FROM slot_changes_wrapper('regression_slot'); + +SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1'); + +SELECT 'stop' FROM pg_drop_replication_slot('regression_slot'); |