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I would love to see some performance comparisons between joins without RI constraints and joins with
the constraints. In fact I would like to see the difference between the CQE and SQE in relation to
this.
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
rob@xxxxxxxxx
Sent: Tuesday, April 01, 2008 7:22 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Referential Integrity Constraints may enhance performance!
RI Constraints may help performance! Even if you've already built the
appropriate keys in a relationship like a key on item number in your item
master, and a the appropriate keys in your order header, if you have a RI
constraint defined between these two files, and often join them, the
optimizer really likes the information provided by a RI constraint.
I'll take any bullet I can to encourage people to start using constraints.
Rob Berendt
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