Re: Case insensitive selects?

From: David Wheeler <david(at)wheeler(dot)net>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Case insensitive selects?
Date: 2001-02-15 16:36:43
Message-ID: Pine.LNX.4.21.0102150836150.16929-100000@theory
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On Thu, 15 Feb 2001, Michael Fork wrote:

> Indexes *can* and *will* be used if you create the appropiate
> functional indexes, i.e:
>
> CREATE INDEX idx_table_field_upper ON table(upper(field));
>
> SELECT field FROM table WHERE upper(field) LIKE upper('some string');

Hmmm...I'd hate to have two indexes on every field I query like this, one
case-senstive, one case-insensitve (like the one you create here). Is
there a configuration option or something that will tell pgsql to do
case-insensitive comparisons (kinda like MS SQL Server has)? That could
save us on indexing overhead, since we want all of our WHERE comparisons
to be case-insensitive, anyway.

I should also not that we're also using --with-multibyte and having all of
our databases use Unicode exclusively.

Thanks!

David

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