Re: DISTINCT ON

Tom Lane wrote:
> Greg Stark <gsstark(at)mit(dot)edu> writes:
>
>> On Wed, Nov 4, 2009 at 3:17 AM, Emmanuel Cecchet <manu(at)asterdata(dot)com> wrote:
>>
>>> SELECT DISTINCT ON ('1'::varchar, '1'::varchar) a FROM (SELECT 1 AS a) AS a
>>> ORDER BY '1'::varchar, '1'::varchar, '2'::varchar;
>>>
>
>
>> This sounds familiar. What version of Postgres are you testing this on?
>>
>
> Presumably something before this bug
> http://archives.postgresql.org/pgsql-sql/2008-07/msg00123.php
> got fixed
> http://archives.postgresql.org/pgsql-committers/2008-07/msg00341.php
>
I am using 8.3.6 and it looks like the fix was only integrated in 8.4.
So using 8.4 should solve the problem.

Thanks
Emmanuel

--
Emmanuel Cecchet
Aster Data
Web: http://www.asterdata.com