
        if (expression.exprType != VALUE && expression.exprType != COLUMN
                && expression.exprType != FUNCTION
                && expression.exprType != ALTERNATIVE
                && expression.exprType != CASEWHEN
                && expression.exprType != CONVERT) {
            StringBuffer temp = new StringBuffer();

            ddl = temp.append('(').append(ddl).append(')').toString();
        }

        return ddl;
