Re: index usage

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To: Ben <bench@xxxxxxxxxxxxxxx>
Subject: Re: index usage
From: Tom Lane <tgl@xxxxxxxxxxxxx>
Date: Fri, 28 Jul 2006 17:06:55 -0400
Cc: Daniel Caune <daniel.caune@xxxxxxxxxxx>, pgsql-performance@xxxxxxxxxxxxxx
Comments: In-reply-to Ben <bench@xxxxxxxxxxxxxxx> message dated "Fri, 28 Jul 2006 13:59:57 -0700"
In-reply-to: <Pine.LNX.4.64.0607281359030.11400@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
References: <1E293D3FF63A3740B10AD5AAD88535D202B655F1@xxxxxxxxxxxxxxxxxxxx> <Pine.LNX.4.64.0607281359030.11400@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

Ben <bench@xxxxxxxxxxxxxxx> writes:
> It's volatile, but it will always return an integer.

If it's volatile then it can't be used for an index condition.

			regards, tom lane

References:
- Re: index usage
  - From: Daniel Caune
- Re: index usage
  - From: Ben

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