Re: Regex query not using index

Yes that works, but the whole point of the exercise is replace many OR
statements with 1 regex expression. So it's not what I'm looking for.

On Feb 19, 2008 9:16 PM, Chris <dmagick(at)gmail(dot)com> wrote:
> Postgres User wrote:
> > Thanks, my dumb mistake.
> > I need to perform the equivalent of a WHERE clause OR expression using
> > regex to match exact strings.
> >
> > _________________________________________________________________________
> >
> > this example hits the index:
> > select * from eod where name ~ '^BA$'
> >
> > but when I try to add another possible value to the regex, it does a row scan:
> > select * from eod where name ~ ^BA$|^AA$'
> >
> > both of these statements return the right results, but the 2nd ignores
> > the index even though both values are left-anchored.
> >
> > any workaround- this behavior doesn't seem to make sense
>
> try changing it to
>
> select * from eod where (name ~ '^BA$' or name ~ '^AA$')
>
> though in this example they should both be name = 'XX' rather than regex'es.
>
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