public Parser execSQLStatement() {
        if (execSQLStatementParser == null) {
           FutureParser future = scoped("execSQLStatement");
           execSQLStatementParser = future;
           future.setParser(
               sequence(
                   choice(
                       token("EXEC"),
                       token("EXECUTE")
                   ),
                   token("SQL"),
                   sqlStatement(),
                   optional(
                       skipto(
                           token("END-EXEC")
                       )
                   ),
                   token("END-EXEC")
               )
           );
        }

        return execSQLStatementParser;
    }