1 files changed, 37 insertions, 0 deletions
diff --git a/src/backend/commands/alter.c b/src/backend/commands/alter.c
index 5af0f2ffdf3..7e39422ecd6 100644
--- a/src/backend/commands/alter.c
+++ b/src/backend/commands/alter.c
@@ -391,6 +391,43 @@ ExecRenameStmt(RenameStmt *stmt)
 }
 
 /*
+ * Executes an ALTER OBJECT / DEPENDS ON [EXTENSION] statement.
+ *
+ * Return value is the address of the altered object.  refAddress is an output
+ * argument which, if not null, receives the address of the object that the
+ * altered object now depends on.
+ */
+ObjectAddress
+ExecAlterObjectDependsStmt(AlterObjectDependsStmt *stmt, ObjectAddress *refAddress)
+{
+	ObjectAddress	address;
+	ObjectAddress	refAddr;
+	Relation		rel;
+
+	address =
+		get_object_address_rv(stmt->objectType, stmt->relation, stmt->objname,
+							  stmt->objargs, &rel, AccessExclusiveLock, false);
+
+	/*
+	 * If a relation was involved, it would have been opened and locked.
+	 * We don't need the relation here, but we'll retain the lock until
+	 * commit.
+	 */
+	if (rel)
+		heap_close(rel, NoLock);
+
+	refAddr = get_object_address(OBJECT_EXTENSION, list_make1(stmt->extname),
+								 NULL, &rel, AccessExclusiveLock, false);
+	Assert(rel == NULL);
+	if (refAddress)
+		*refAddress = refAddr;
+
+	recordDependencyOn(&address, refAddress, DEPENDENCY_AUTO_EXTENSION);
+
+	return address;
+}
+
+/*
  * Executes an ALTER OBJECT / SET SCHEMA statement.  Based on the object
  * type, the function appropriate to that type is executed.
  *