Re: Why extract( ... from timestamp ) is not immutable? - Mailing list pgsql-general

From Jasen Betts
Subject Re: Why extract( ... from timestamp ) is not immutable?
Date
Msg-id jgocmm$l1j$8@reversiblemaps.ath.cx
Whole thread Raw
In response to Why extract( ... from timestamp ) is not immutable?  (hubert depesz lubaczewski <depesz@depesz.com>)
List pgsql-general
On 2012-01-25, Adrian Klaver <adrian.klaver@gmail.com> wrote:
> On Wednesday, January 25, 2012 7:48:34 am hubert depesz lubaczewski wrote:
>> On Wed, Jan 25, 2012 at 07:44:14AM -0800, Adrian Klaver wrote:
>> > > I thought that this is what I will achieve with extract(epoch from
>> > > now() at time zone 'UTC') but clearly it doesn't work.
>> > > So what options do I have?
>> >
>> > Isn't extract(epoch from now()) getting what you want?
>>
>> you can't make index on it.
>
> I am afraid I am not following. So you can make an index on?:
>
> extract(epoch from now() at time zone 'UTC')

that one gets you the wrong result.

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