Re: best index for ~ ordering?

Well, im wondering if is possible using LIKE '%blah%', even better would be
upper/lower(string) like '%blah%',

Im not at work right now, i will try it latter and makes you know about
the results of using tsearch indexing.

Thanks a lot, man!
Gerardo
> On Tue, Mar 06, 2007 at 06:34:23PM -0300, Gerardo Herzig wrote:
>> Hi all, i have a large table with one varchar field, and im triyng to
>> get information about what index should i use in order to using that
>> index (if this is possible) for ~ searching, and/or using LIKE
>> searching.
>
> What sort of match are you doing? If you're doing left-anchored
> searches (LIKE 'blah%') then your standard btree is good. If you're
> doing unanchored searches (LIKE '%blah%' or similar) you're best doing
> tsearch. If it's right-anchored, you can do an index on the reverse
> of the string.
>
> A
>
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> Andrew Sullivan | ajs(at)crankycanuck(dot)ca
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--
Gerardo Herzig
Direccion General de Organizacion y Sistemas
Facultad de Medicina
U.B.A.