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From: Tom Lane <[email protected]>
To: David Fetter <[email protected]>
Cc: PostgreSQL Docs <[email protected]>
Subject: Re: Missing information on Expressional Indexes
Date: Wed, 17 Mar 2010 00:47:51 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

David Fetter <[email protected]> writes:
> I think this page should mention that the expressions used in an
> expressional index need to be equivalent to an IMMUTABLE function, and
> the docs don't say so.

Sure they do, see CREATE INDEX:

	All functions and operators used in an index definition must be
	"immutable" ...

			regards, tom lane

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