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From Manish Khettry <manish.khet...@gmail.com>
Subject Re: jira question
Date Wed, 03 Aug 2005 04:24:05 GMT
On 8/1/05, Mike Matrigali <mikem_app@sbcglobal.net> wrote:
> I still think
> it would be nice if the optimizer could tell that an expression in
> a where clause matched the result of the expression which generated
> the column, otherwise indexes on the generated column aren't as interesting.

The expression used for the generated column must be stored in the
data dictionary. Does derby serialize expressions? I was looking
around in the classes in impl/sq/compile (ValueNode and such) and
these classes don't seem to implement Formatable.


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