Re: Optimizing maximum/minimum queries (yet again) - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Optimizing maximum/minimum queries (yet again)
Date
Msg-id 18894.1113018028@sss.pgh.pa.us
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In response to Re: Optimizing maximum/minimum queries (yet again)  (Bruno Wolff III)
Responses Re: Optimizing maximum/minimum queries (yet again)  (Bruno Wolff III)
List pgsql-hackers
Bruno Wolff III <> writes:
> It should be possible to make this work for bool_and and bool_or as those
> are equivalent to min and max for the boolean type.

This would just be a matter of marking them properly in the catalogs.

However, are they really equivalent in the corner cases?  In particular,
I think boolean AND across zero input rows is probably supposed to
return TRUE, not NULL.
        regards, tom lane


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