Re: BUG #2075: Strange choice of bitmap-index-scan

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Arjen" <acmmailing(at)tweakers(dot)net>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #2075: Strange choice of bitmap-index-scan
Date: 2005-11-30 17:11:51
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"Arjen" <acmmailing(at)tweakers(dot)net> writes:
> So, it uses the correct index, but somehow decides to also use the other
> cat2_... index, which it doesn't need of course.

I've tweaked the heuristics in choose_bitmap_and to (hopefully) work a
bit better in scenarios like this. Thanks for the example.

regards, tom lane

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