| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Ranier Vilela <ranier(dot)vf(at)gmail(dot)com> |
| Cc: | Zhihong Yu <zyu(at)yugabyte(dot)com>, Rajkumar Raghuwanshi <rajkumar(dot)raghuwanshi(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Getting ERROR "subplan "SubPlan 1" was not initialized" in EXISTS subplan when using for list partition. |
| Date: | 2021-09-15 15:00:53 |
| Message-ID: | 983045.1631718053@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Ranier Vilela <ranier(dot)vf(at)gmail(dot)com> writes:
> I would like to ask if this alternative fix (attached) would also solve the
> problem or not.
If I'm reading the patch correctly, that fixes it by failing to drop
unused subplans at all --- the second loop you have has no external
effect.
We could, in fact, not bother with removing the no-longer-referenced
subplans, and it probably wouldn't be all that awful. But the intent
of the original patch was to save the executor startup time for such
subplans, so I wanted to preserve that goal if I could. The committed
patch seems small enough and cheap enough to be worthwhile.
regards, tom lane
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