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Referential integrity with filter
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From
14/09/2001 02:32:24
Cristian Tenea
Aquila Part Prod Com
Ploiesti, Romania
 
 
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Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Title:
Referential integrity with filter
Miscellaneous
Thread ID:
00556328
Message ID:
00556328
Views:
56
HI,

I try to build a referential integrity on relation wich on many-side have a filter to limit record indexed - records without values are not indexed. When I try to append record the trigger dosen't allow.

In other words there are an index on 'nrdoc' with filter '.not.empty(nrdoc)' wich is foreign related to primary index 'nrdoc' from 'docs' table with restrict rules. What I try to do is to enforce integrity on records wich have a value to 'nrdoc', other with empty value I want ignored. When append a record wich have empty 'nrdoc' I can't - what are evaluated first index or trigger?

How to do this behaviour? In VFP7 referential procedures are generated with regards of filter expresions on index?

Thanks.
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