RE: Different Plans for Literal Vs Bind Variables
- From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
- To: "oraseeker@xxxxxxxxx" <oraseeker@xxxxxxxxx>, Ian MacGregor <ian@xxxxxxxxxxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 13 Jan 2009 09:31:34 -0700
Hi Karen, I think the OP said this query was coming from Peoplesoft so he
couldn't change it - that eliminates the options of using literals or hints and
leaves him with either a stored outline or SQL profile or modifying the view
and then dealing with any side effects that may have for other queries that use
the same view.
I think the million dollar question here is - why is the CBO using the default
5% selectivity? Why isn't it calculating the selectivity based on the peeked
bind value like it's supposed to?
Regards,
Brandon
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