Adding upstream version 15.4.upstream/15.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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');