Re: How to observe plan_cache_mode transition from custom to generic plan?
| От | Richard Michael |
|---|---|
| Тема | Re: How to observe plan_cache_mode transition from custom to generic plan? |
| Дата | |
| Msg-id | CABR0jERj6UZfjPCvK193-fvBh2+1+oK3msZprK1k04O9v=53+g@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: How to observe plan_cache_mode transition from custom to generic plan? (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: How to observe plan_cache_mode transition from custom to generic plan?
|
| Список | pgsql-general |
Hi Tom,
On Thu, Sep 9, 2021 at 6:02 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
Richard Michael <rmichael@edgeofthenet.org> writes:
> After reading Laurenz's reply, I experimented again with `PREPARE
> basic(int) AS SELECT $1 AS number;" and the query plan logged in the log
> file (by auto_explain) does indeed show "Output: $1" on the sixth EXPLAIN
> EXECUTE! Sorry I missed this earlier. (The EXPLAIN EXECUTE output itself
> does not contain an "Output:" line, so I didn't notice this lack of
> parameter substitution in psql.)
I think EXPLAIN VERBOSE would add that bit of detail.
Indeed it does! I literally just now experimented with this and was returning to the ML reply to myself to avoid wasting more of anyone's time.
Would a tiny patch to the PREPARE docs be accepted? I'd like to help clarify investigating `plan_cache_mode` for future readers.
Thanks for replying, regards,
Richard
regards, tom lane
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