Re: Bitmap index thoughts

From: Gavin Sherry <swm(at)alcove(dot)com(dot)au>
To: Heikki Linnakangas <heikki(at)enterprisedb(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Bitmap index thoughts
Date: 2007-02-08 16:28:25
Message-ID: Pine.LNX.4.58.0702090327120.31875@linuxworld.com.au
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On Thu, 8 Feb 2007, Heikki Linnakangas wrote:

> Gavin Sherry wrote:
> > I will update the code tomorrow. The focus will be cleaning up the
> > executor modifications. Please look else where for now.
>
> I'm getting a segfault with this test script:
>
> --------
> CREATE TABLE bmtest (i int);
>
> INSERT INTO bmtest SELECT 1 FROM generate_series(1,100000) a;
> INSERT INTO bmtest SELECT 10 FROM generate_series(1,100) a;
> DELETE FROM bmtest WHERE i = 1;
> VACUUM bmtest;
>
> CREATE INDEX i_bmtest ON bmtest USING bitmap (i);
>
> INSERT INTO bmtest SELECT 10 FROM generate_series(1,100000) a;
> --------
>

Hmm... this triggers a bug in the newly rewritten update code I think.
I'll post a fix soon.

Thanks for testing!

Gavin

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