postgres
diff --git a/‎src/backend/catalog/heap.c
Copy file name to clipboardExpand all lines: src/backend/catalog/heap.c
+7Lines changed: 7 additions & 0 deletions b/‎src/backend/catalog/heap.c
Copy file name to clipboardExpand all lines: src/backend/catalog/heap.c
+7Lines changed: 7 additions & 0 deletions
@@ -1249,6 +1249,13 @@ heap_create_with_catalog(const char *relname,
 										relpersistence);
 	}
 
+	/*
+	 * Other sessions' catalog scans can't find this until we commit.  Hence,
+	 * it doesn't hurt to hold AccessExclusiveLock.  Do it here so callers
+	 * can't accidentally vary in their lock mode or acquisition timing.
+	 */
+	LockRelationOid(relid, AccessExclusiveLock);
+
 	/*
 	 * Determine the relation's initial permissions.
 	 */