| From: | Jon Rosebaugh <jon(at)inklesspen(dot)com> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Joining on CTE is unusually slow? |
| Date: | 2014-08-04 22:47:37 |
| Message-ID: | 1407192457.3180378.149115721.2A79E5A5@webmail.messagingengine.com |
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| Lists: | pgsql-general |
On Mon, Aug 4, 2014, at 06:40 PM, Jon Rosebaugh wrote:
> On Tue, Jul 29, 2014, at 05:38 PM, David G Johnston wrote:
> > You should at least provide some explain a/o explain analyse results.
> >
> > Not to sound pedantic here but you are not JOINing on the CTE, you are
> > pushing it into WHERE clause via a pair of sub-selects.
>
> Fair criticisms. Okay, here we go. Table schemas at the end of the
> email. My apologies for the length; I didn't want to try trimming out
> "irrelevant" things that would end up causing actual changes to the
> question I'm asking. I've run EXPLAIN ANALYZE for all the queries.
Looks like line wrapping might have done a number on the explain output.
I've put it all in the following pastebin just in case:
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