Re: best index for ~ ordering?

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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