code: public final String evalSqlValue(
      final String pName) throws ExceptionWithCode {
      Object value = evalObjectValue(pName);
      if (value == null) {
        return "null";
      } else {
        return value.toString();
      }
    }
docs: <p>Evaluate column value for SQL statement INSERT or UPDATE.</p>
  @param pName column name
  @return String column value
  @throws ExceptionWithCode if column not found