Re: create index on function - why?

From: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, wweng(at)kencast(dot)com
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: create index on function - why?
Date: 2002-12-22 10:18:22
Message-ID: 5.1.0.14.0.20021222211601.04f26150@mail.rhyme.com.au
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At 11:46 AM 15/02/2002 -0500, Tom Lane wrote:
>A functional index is sort of like a hidden, precomputed column added to
>your table.

One of the things I keep running into is the desire for a mixed
functional/data index. I know the workaround is to build a function that
combines all fields, but would it be hard to allow mixed indexes:

create table users(id integer, last_name text);
create index users_id_name on users(id,lower(name));

?

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