Re: How to make operator class?

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: sqllist <pgsql-sql(at)postgresql(dot)org>
Subject: Re: How to make operator class?
Date: 2001-02-10 18:03:24
Message-ID: 3A85826C.D8A40CFF@agliodbs.com
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Tom,

> > Hmmm .... thinking about it logically, shouldn't the database engine be
> > able to use an index on a single column either backwards or forwards?
>
> Sure, but he wanted a sort with the first column in ascending order and
> the second in descending order. You can't get that by scanning an index
> that has both columns in the same order...

Aha. I see the problem. My approach would be to use two seperate
indexes, but maybe that's not sophisticated enough :-)

And, Tom, you're working too hard again. It's Saturday. Go home.

-Josh Berkus (Who is home, just VPN'ing into my office).

--
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