On 26 June 2014 10:01, David Rowley <dgrowleyml@gmail.com> wrote:
>> Did you comment on the transitive closure question? Should we add a
>> test for that, whether or not it works yet?
>>
>
> In my previous email.
>
> I could change the the following to use c.id in the targetlist and group by
> clause, but I'm not really sure it's testing anything new or different.
>
> EXPLAIN (COSTS OFF)
> SELECT a.id FROM a
> LEFT JOIN (SELECT b.id,1 as dummy FROM b INNER JOIN c ON b.id = c.id GROUP
> BY b.id) b ON a.id = b.id AND b.dummy = 1;
OK, agreed, no need to include.
-- Simon Riggs http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services
