add create/drop/alter view to the trigger

scripts-available/CDB_GhostTables.sql

@@ -93,7 +93,7 @@ AS $$
   BEGIN
     CREATE EVENT TRIGGER link_ghost_tables
     ON ddl_command_end
-    WHEN TAG IN ('CREATE TABLE', 'SELECT INTO', 'DROP TABLE', 'ALTER TABLE', 'CREATE TRIGGER', 'DROP TRIGGER')
+    WHEN TAG IN ('CREATE TABLE', 'SELECT INTO', 'DROP TABLE', 'ALTER TABLE', 'CREATE TRIGGER', 'DROP TRIGGER', 'CREATE VIEW', 'DROP VIEW', 'ALTER VIEW')
     EXECUTE PROCEDURE CDB_SaveDDLTransaction();
   END;
 $$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;