Примеры Использования

CREATE PROCEDURE SHOWNUMS
RETURNS (
  AA INTEGER,
  BB INTEGER,
  SM INTEGER,
  DF INTEGER)
AS
BEGIN
  FOR SELECT DISTINCT A, B
      FROM NUMBERS
    ORDER BY A, B
    INTO AA, BB
  DO
  BEGIN
    SM = AA + BB;
    DF = AA - BB;
    SUSPEND;
  END
END

CREATE PROCEDURE RELFIELDS
RETURNS (
  RELATION CHAR(32),
  POS INTEGER,
  FIELD CHAR(32))
AS
BEGIN
  FOR SELECT RDB$RELATION_NAME
      FROM RDB$RELATIONS
      ORDER BY 1
      INTO :RELATION
  DO
  BEGIN
    FOR SELECT
          RDB$FIELD_POSITION + 1,
          RDB$FIELD_NAME
        FROM RDB$RELATION_FIELDS
        WHERE
          RDB$RELATION_NAME = :RELATION
        ORDER BY RDB$FIELD_POSITION
        INTO :POS, :FIELD
    DO
    BEGIN
      IF (POS = 2) THEN
        RELATION = ' "';
      -- Для исключения повтора имён таблиц и представлений
      SUSPEND;
    END
  END
END

CREATE PROCEDURE DELTOWN (
  TOWNTODELETE VARCHAR(24))
RETURNS (
  TOWN VARCHAR(24),
  POP INTEGER)
AS
BEGIN
  FOR SELECT TOWN, POP
      FROM TOWNS
      INTO :TOWN, :POP
      AS CURSOR TCUR
  DO
  BEGIN
    IF (:TOWN = :TOWNTODELETE) THEN
      -- Позиционное удаление записи
      DELETE FROM TOWNS
      WHERE CURRENT OF TCUR;
    ELSE
      SUSPEND;
  END
END

EXECUTE BLOCK
RETURNS (
    o CHAR(63))
AS
BEGIN
  FOR
      SELECT
          rdb$relation_name AS name
      FROM
          rdb$relations AS CURSOR c
  DO
  BEGIN
    o = c.name;
    SUSPEND;
  END
END

EXECUTE BLOCK
RETURNS (
    o1 CHAR(63),
    o2 CHAR(63))
AS
BEGIN
  FOR
      SELECT
          rdb$relation_name
      FROM
          rdb$relations
      WHERE
          rdb$relation_name = 'RDB$RELATIONS' AS CURSOR c
  DO
  BEGIN
    FOR
        SELECT
            -- с префиксом разрешается как курсор
            :c.rdb$relation_name x1,
            -- без префикса как псевдоним таблицы rdb$relations
            c.rdb$relation_name x2
        FROM
            rdb$relations c
        WHERE
            rdb$relation_name = 'RDB$DATABASE' AS CURSOR d
    DO
    BEGIN
      o1 = d.x1;
      o2 = d.x2;
      SUSPEND;
    END
  END
END