| From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | David L <segedunum(at)actuaria(dot)co(dot)uk> |
| Cc: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, pgsql-admin(at)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Using Views as Tables |
| Date: | 2017-01-09 08:28:58 |
| Message-ID: | CANP8+jJoTsFa+WQxBF4XTQQAWD9Q=vakKfiWhN7_M=qABXUcdQ@mail.gmail.com |
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| Lists: | pgsql-admin |
> On 9 Jan 2017 1:46 a.m., "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> wrote:
>> I.e. the query planner does NOTHING different for a select from a view
>> than if you just run the query that makes the up the view by hand.
On 9 January 2017 at 08:22, David L <segedunum(at)actuaria(dot)co(dot)uk> wrote:
> Yes I know. That's the point.
At the moment, nobody can see a reason for the behaviour you are describing.
To take this further you'd need to show evidence or a repeatable test
that showed the effect you are describing is real, even if nobody here
can understand what would be causing it, yet.
Perhaps try executing your test case a million times and report on any
tests that are very substantially longer in the way you describe?
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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