From: | Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl> |
---|---|
To: | val(at)webtribe(dot)net |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Indexes on Character Types |
Date: | 2004-07-28 18:51:31 |
Message-ID: | 20040728185131.GA4406@dcc.uchile.cl |
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Lists: | pgsql-general |
On Wed, Jul 28, 2004 at 12:31:00PM +0100, val(at)webtribe(dot)net wrote:
> In the 7.3 documentation about character data types
> (http://www.postgresql.org/docs/7.3/static/datatype-
> character.html), it states:
> "Tip: There are no performance differences between these* three
> types, apart from the increased storage size when using the
> blank-padded type."
> *referencing character, character varying and text data types
>
> Is that statement applicable to indexes applied to those
> columns? Is there any difference in performance for an index
> applied to a character, character varying and text data type?
Yes, no. Apart from the increased storage size when using the
blank-padded type.
--
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
Criptografía: Poderosa técnica algorítmica de codificación que es
empleada en la creación de manuales de computadores.
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