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Cascading Referential Integrity
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To
17/02/2011 11:28:41
General information
Forum:
Visual FoxPro
Category:
Other
Environment versions
Visual FoxPro:
VFP 9 SP1
Miscellaneous
Thread ID:
01499588
Message ID:
01500551
Views:
39
>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
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