| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
| Cc: | Peter Geoghegan <pg(at)heroku(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Subject: | Re: Avoid parallel full and right join paths. |
| Date: | 2016-04-21 01:43:29 |
| Message-ID: | 20160421014329.GA975337@alvherre.pgsql |
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| Lists: | pgsql-hackers |
Michael Paquier wrote:
> On Thu, Apr 21, 2016 at 7:13 AM, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
> > On Wed, Apr 20, 2016 at 2:49 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> >> Committed. But I think the regression test needs more thought, so I
> >> left that out.
> >
> > It would be nice if there was a fuzz testing infrastructure that
> > verified that parallel plans produce the same answer as serial plans.
>
> Results of parallel plans and serial plans could be stored in
> temporary tables in the test, then that's a matter of comparing them I
> guess. That's largely doable.
The brin.sql test does that ...
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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