Re: [HACKERS] TODO item: Implement Boyer-Moore searching (First time hacker)

Heikki Linnakangas <[email protected]> Mon, 08 Sep 2008 09:45:18 +0300
Newsgroups gmane.comp.db.postgresql.devel.patches
Organization EnterpriseDB
Message-ID <[email protected]>
Tom Lane wrote:
> Heikki Linnakangas <[email protected]> writes:
>> Also, it would be nice to use B-M(-H) for LIKE as well.
> 
> Right offhand, that seems impossible, at least in patterns with %.
> Or were you thinking of trying to separate out the fixed substrings
> of a pattern and search for them with BMH?

Yep, something like that. Even if it only handled the special case of 
'%foobar%', that would be nice, because that's a pretty common special case.

> Anyway, it's not material for this patch, since it'd involve pretty
> fundamental redesign of the LIKE code.

Yep.

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com

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