Курсовые по ИТВЭ. 18 и 27 варианты / 18.База данных туристической фирмы(Мозговитова Ю.А. МЭ-52) / D_tur

TRIGGER PROCEDURE FOR DELETE OF tur.
/* ERwin Builtin Wed Dec 07 19:57:42 2005 */
/* DELETE trigger on tur */

/* ERwin Builtin Wed Dec 07 19:57:42 2005 */
/* tur R/3 putevka ON PARENT DELETE RESTRICT */
/* ERWIN_RELATION:PARENT_OWNER="", PARENT_TABLE="tur"
CHILD_OWNER="", CHILD_TABLE="putevka"
P2C_VERB_PHRASE="R/3", C2P_VERB_PHRASE="",
FK_CONSTRAINT="отправляет_в", FK_COLUMNS="num_tur" */
IF CAN-FIND(FIRST putevka WHERE
/* %JoinFKPK(putevka,tur," = "," and") */
putevka.num_tur = tur.num_tur)
THEN DO:
MESSAGE "Cannot DELETE 'tur' because 'putevka' exists.".
RETURN ERROR.
END.


/* ERwin Builtin Wed Dec 07 19:57:42 2005 */