| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Marko Tiikkaja <marko(at)joh(dot)to>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: BUG #15383: Join Filter cost estimation problem in 10.5 |
| Date: | 2020-02-27 19:24:55 |
| Message-ID: | 20200227192455.GA1788@alvherre.pgsql |
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| Lists: | pgsql-bugs pgsql-hackers |
On 2019-Nov-30, Tom Lane wrote:
> Or, since I think we're out of the realm of what would be sane to
> back-patch anyway, maybe it's time to take two steps back and try
> to find a real, non-stopgap solution. As I said upthread, I think
> the core problem here is failure to distinguish quals associated with
> the uniqueness condition from additional "filter" quals that have to
> be checked anyway. I wonder how hard that is to fix.
So does anyone have a way to move this forward? David, any input on
this?
Thanks
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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