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

From Tom Lane
Subject Re: [HACKERS] TODO item: Implement Boyer-Moore searching (First time hacker)
Date
Msg-id 27136.1220634737@sss.pgh.pa.us
Whole thread Raw
In response to Re: [HACKERS] TODO item: Implement Boyer-Moore searching (First time hacker)  ("David Rowley" <dgrowley@gmail.com>)
Responses Re: [HACKERS] TODO item: Implement Boyer-Moore searching (First time hacker)  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
List pgsql-patches
"David Rowley" <dgrowley@gmail.com> writes:
> Tom Lane wrote:
>> Hmm.  B-M-H has worst case search speed O(M*N) (where M = length of
>> pattern, N = length of search string); whereas full B-M is O(N). Maybe we
>> should build the second table when M is large?

> I'll look into this. If it pays off for longer searches I'll submit a patch.
> I won't have the time until after the 15th, so perhaps that's in November's
> commit fest?

Yes.  Let's get B-M-H in during this fest and then you can look into
whether a follow-on patch is worthwhile.

            regards, tom lane

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