public Parser replacingInitClause() {
        if (replacingInitClauseParser == null) {
           FutureParser future = scoped("replacingInitClause");
           replacingInitClauseParser = future;
           future.setParser(
               sequence(
                   token("REPLACING"),
                   replacementTarget(),
                   optional(
                       token("DATA")
                   ),
                   token("BY"),
                   choice(
                       identifier(),
                       literal()
                   )
               )
           );
        }

        return replacingInitClauseParser;
    }