docs: public final String toSqlOperator(
      final EFilterOperator pFilterOperator) throws Exception {
      if (EFilterOperator.LESS_THAN.equals(pFilterOperator)) {
        return "<";
      }
      if (EFilterOperator.LESS_THAN_EQUAL.equals(pFilterOperator)) {
        return "<=";
      }
      if (EFilterOperator.GREATER_THAN.equals(pFilterOperator)) {
        return ">";
      }
      if (EFilterOperator.GREATER_THAN_EQUAL.equals(pFilterOperator)) {
        return ">=";
      }
      throw new Exception(
        "Algorithm error! Cant match SQL operator to EFilterOperator: "
          + pFilterOperator);
    }