Re: POSIX regex performance bug in 7.3 Vs. 7.2 - Mailing list pgsql-hackers

From Christopher Kings-Lynne
Subject Re: POSIX regex performance bug in 7.3 Vs. 7.2
Date
Msg-id 20030201203052.C32061-100000@houston.familyhealth.com.au
Whole thread Raw
In response to POSIX regex performance bug in 7.3 Vs. 7.2  (wade <wade@wavefire.com>)
Responses Re: POSIX regex performance bug in 7.3 Vs. 7.2  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Why on earth are you using a CVS version!?!?!?!

Chris

On Fri, 31 Jan 2003, wade wrote:

> Hello,
>   We recently upgraded a project from 7.2 to 7.3.1 to make use of some of
> the cool new features in 7.3.  The installed version is CVS stable from
> yesterday.  However, we noticed a major performance hit in POSIX regular
> expression matches against columns using the ~* operator.
> http://arch.wavefire.com/badregex73.txt has explain analyze output from 7.2
> and 7.3.1 respectively.  Both of these tables have only 101 rows.  The
> 7.3.1 install is using the default settings from postgresql.conf.
>
>   Any ideas as to why this should be happening?
>
>   Should anyone require additional information, please let me know.
>
> -Wade Klaver
>
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