Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Cascading Referential Integrity
Message
 
 
À
17/02/2011 11:28:41
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9 SP1
Divers
Thread ID:
01499588
Message ID:
01500551
Vues:
38
>Depends on the trigger and the option (ignore, .restrict..)
>
>In case of a PK to FK Child table and Update is set to cascade
> - it will be as you described
> something like
> if( field of pk changed )
> use childtable (NO INDEX !)
> scan all for FKField = oldvalue of PK
> replace FKField with new value of PK
> endscan
> close childtable
> endif

Thank you for your help!
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform