Re: 7.3 no longer using indexes for LIKE queries

From: Bruno Wolff III <bruno(at)wolff(dot)to>
To: Matthew Gabeler-Lee <mgabelerlee(at)zycos(dot)com>
Cc: "'pgsql-general(at)postgresql(dot)org'" <pgsql-general(at)postgresql(dot)org>
Subject: Re: 7.3 no longer using indexes for LIKE queries
Date: 2002-12-05 17:25:24
Message-ID: 20021205172524.GA2942@wolff.to
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On Wed, Dec 04, 2002 at 16:02:28 -0500,
Matthew Gabeler-Lee <mgabelerlee(at)zycos(dot)com> wrote:
> Can anyone explain the rationale behind that sort order? I'm guessing it
> has something to do with getting sequences of words sorted 'right', but I
> fail to see how that is right. I'd think when sorting it would make sense
> to have all sequences of words that start with the same word(s) together.
>
> $ echo -e 'bobbill\nbobrob\nbob bill\nbob robber' | LC_ALL=en_US sort
> bobbill
> bob bill -\
> bobrob |-- Seems these ought to be adjacent?
> bob robber -/
>
> Perhaps I'm just old fashioned. In any case, I don't define locale
> collation orders, so *shrug*.

I prefer en_US for sorting names. I like that last names like "des Jardins",
"desJardins" and "Des Jardins" will all show up next to each other, because
that is what I think humans will expect. (Note that I sort by first, middle
and last names separately.)

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