Re: Rewrite, normal execution vs. EXPLAIN ANALYZE

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>

To: Marko Tiikkaja <marko.tiikkaja@cs.helsinki.fi>

Cc: David Fetter <david@fetter.org>, pgsql-hackers@postgresql.org

Date: 2010-07-23T19:00:47Z

Lists: pgsql-hackers

On Fri, Jul 23, 2010 at 2:13 PM, Marko Tiikkaja
<marko.tiikkaja@cs.helsinki.fi> wrote:
> On 7/23/2010 8:52 PM, David Fetter wrote:
>>
>> On Thu, Jul 22, 2010 at 08:43:35PM +0300, Marko Tiikkaja wrote:
>>>
>>> Did I misunderstand the code?  And if I didn't, why do we do this
>>> differently?
>>
>> You mentioned in IRC that this was in aid of getting wCTEs going.  How
>> are these things connected?
>
> Currently, I'm trying to make wCTEs behave a bit like RULEs do.  But if
> every rewrite product takes a new snapshot, wCTEs will behave very
> unpredictably.
>
> But because EXPLAIN ANALYZE does *not* take a new snapshot for every rewrite
> product, I'm starting to think that maybe this isn't the behaviour we wanted
> to begin with?

Where should I be looking in the code for this?

-- 
Robert Haas
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