| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Richard Guo <guofenglinux(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Alexandra Wang <alexandra(dot)wang(dot)oss(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "bruce(at)momjian(dot)us" <bruce(at)momjian(dot)us>, lepihov(at)gmail(dot)com |
| Subject: | Re: plan shape work |
| Date: | 2025-09-26 02:37:20 |
| Message-ID: | 3977574.1758854240@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Richard Guo <guofenglinux(at)gmail(dot)com> writes:
> FWIW, I'm a bit concerned about the double for loop inside
> choose_plan_name(), especially since the outer loop runs with a true
> condition. Maybe I'm just worrying over nothing, as we probably don't
> expect a large number of subroots in practice, but the nested loops
> still make me a little uneasy.
I really doubt that a query could have enough subplans to make
that a problem. But if I'm wrong, it's surely something we could
improve in a localized way later.
regards, tom lane
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