RE: Data load ideas
- From: "Jacques Kilchoer" <Jacques.Kilchoer@xxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 4 May 2004 12:27:38 -0700
Would the FKs in a data warehouse do any harm?
I imagine that they would come in handy for your new DBA to do an entity
relationship diagram.=20
-----Original Message-----
Tim Gorman
Why are you using foreign keys in a data warehouse anyway?
The only technical reason for FKs in a DW is when one is trying to use
materialized view query-rewrite and one is utilizing
QUERY_REWRITE_INTEGRITY
=3D ENFORCED to prevent MV "staleness". Otherwise, there is no =
technical
reason for FKs, as there is no need for RI to be enforced in the DW,
because
the DW is not the source-of-record for the data. Validation reporting
is
much more effective than enforced constraints.
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