Примеры Использования

CREATE EXCEPTION COUNTRY_EXIST '';
SET TERM ^;
CREATE PROCEDURE ADD_COUNTRY (
    ACountryName COUNTRYNAME,
    ACurrency VARCHAR(10) )
AS
BEGIN
  INSERT INTO country (country, currency)
  VALUES (:ACountryName, :ACurrency);

  WHEN SQLCODE -803 DO
    EXCEPTION COUNTRY_EXIST 'Такая страна уже добавлена!';
END^
SET TERM ^;

CREATE PROCEDURE ADD_COUNTRY (
    ACountryName COUNTRYNAME,
    ACurrency VARCHAR(10) )
AS
BEGIN
  INSERT INTO country (country,
                       currency)
  VALUES (:ACountryName,
          :ACurrency);
  WHEN ANY DO
  BEGIN
    -- Записываем ошибку в журнал
    IN AUTONOMOUS TRANSACTION DO
      INSERT INTO ERROR_LOG (PSQL_MODULE,
                             ERROR_TEXT,
                             EXCEPTION_NAME,
                             GDS_CODE,
                             SQL_CODE,
                             SQL_STATE)
      VALUES ('ADD_COUNTRY',
              RDB$ERROR(MESSAGE), -- текст сообщения об ошибке
              RDB$ERROR(EXCEPTION), -- имя пользовательского исключения
              GDSCODE,
              SQLCODE,
              SQLSTATE
      );
    -- Повторно возбуждаем ошибку
    EXCEPTION;
  END
END

...
WHEN GDSCODE GRANT_OBJ_NOTFOUND,
	   GDSCODE GRANT_FLD_NOTFOUND,
	   GDSCODE GRANT_NOPRIV,
	   GDSCODE GRANT_NOPRIV_ON_BASE
DO
BEGIN
	EXECUTE PROCEDURE LOG_GRANT_ERROR(GDSCODE);
	EXIT;
END
...

EXECUTE BLOCK
AS
    DECLARE VARIABLE I INT;
BEGIN
  BEGIN
    I = 1 / 0;
    WHEN SQLSTATE '22003' DO
      EXCEPTION E_CUSTOM_EXCEPTION
        'Numeric value out of range.';
    WHEN SQLSTATE '22012' DO
      EXCEPTION E_CUSTOM_EXCEPTION 'Division by zero.';
    WHEN SQLSTATE '23000' DO
      EXCEPTION E_CUSTOM_EXCEPTION
        'Integrity constraint violation.';
  END
END