(2018/11/28 13:38), Etsuro Fujita wrote:
> BTW another thing I noticed is this comment on costing aggregate
> pushdown paths using local statistics in estimate_path_cost_size:
>
> * Also, core does not care about costing HAVING expressions and
> * adding that to the costs. So similarly, here too we are not
> * considering remote and local conditions for costing.
>
> I think this was true when aggregate pushdown went in, but isn't anymore
> because of commit 7b6c07547190f056b0464098bb5a2247129d7aa2. So we
> should update estimate_path_cost_size so that it accounts for the
> selectivity and cost of the HAVING expressions as well?
There seems to be no objections, I updated the patch as such. Attached
is an updated version of the patch.
Best regards,
Etsuro Fujita