1 files changed, 41 insertions, 0 deletions
diff --git a/contrib/test_decoding/sql/decoding_in_xact.sql b/contrib/test_decoding/sql/decoding_in_xact.sql
new file mode 100644
index 00000000000..2771afee7a4
--- /dev/null
+++ b/contrib/test_decoding/sql/decoding_in_xact.sql
@@ -0,0 +1,41 @@
+-- predictability
+SET synchronous_commit = on;
+
+-- fail because we're creating a slot while in an xact with xid
+BEGIN;
+SELECT txid_current() = 0;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ROLLBACK;
+
+-- fail because we're creating a slot while in an subxact whose topxact has a xid
+BEGIN;
+SELECT txid_current() = 0;
+SAVEPOINT barf;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+ROLLBACK TO SAVEPOINT barf;
+ROLLBACK;
+
+-- succeed, outside tx.
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
+
+-- succeed, in tx without xid.
+BEGIN;
+SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
+COMMIT;
+
+CREATE TABLE nobarf(id serial primary key, data text);
+INSERT INTO nobarf(data) VALUES('1');
+
+-- decoding works in transaction with xid
+BEGIN;
+SELECT txid_current() = 0;
+-- don't show yet, haven't committed
+INSERT INTO nobarf(data) VALUES('2');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+COMMIT;
+
+INSERT INTO nobarf(data) VALUES('3');
+SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
+
+SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');