Re: Rewrite, normal execution vs. EXPLAIN ANALYZE

On 7/24/2010 1:43 AM, Robert Haas wrote:
> On Fri, Jul 23, 2010 at 6:20 PM, Alvaro Herrera
> <alvherre@commandprompt.com>  wrote:
>> It seems like it's EXPLAIN ANALYZE that needs fixing.
>
> I would suggest that if we're going to change this, we back-patch it
> to 9.0 before beta4.

I did some digging and found the commit that changed the behaviour:
http://archives.postgresql.org/pgsql-committers/2004-09/msg00155.php and 
then later Tom fixed a bug in it: 
http://archives.postgresql.org/pgsql-committers/2005-10/msg00316.php

According to the latter commit, not updating the snapshot could be 
preferable for EXPLAIN ANALYZE, but I don't see why this is.  Maybe we 
should wait until we hear from Tom?


Regards,
Marko Tiikkaja