| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Clinton Adams <clinton(dot)adams(at)gmail(dot)com> |
| Cc: | pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #14404: High row estimates when query uses master inherited tables |
| Date: | 2016-11-02 19:53:10 |
| Message-ID: | 25623.1478116390@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-bugs |
I wrote:
> Ah. So this must be something to do with the foreign-key-driven rowcount
> estimates we added in 9.6. Will look into it, thanks for the report!
I think the answer is that we failed to consider inheritance cases at all
while developing the aforementioned logic. For the moment, I've
band-aided this by disabling the FK estimation logic when either relation
is an inheritance parent. If you need a patch immediately, see
regards, tom lane
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