Re: [HACKERS] Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling)
| От | Tom Lane |
|---|---|
| Тема | Re: [HACKERS] Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling) |
| Дата | |
| Msg-id | 837.1484680521@sss.pgh.pa.us обсуждение |
| Ответ на | Re: Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling) (Andres Freund <andres@anarazel.de>) |
| Ответы |
Re: [HACKERS] Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling)
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| Список | pgsql-hackers |
Andres Freund <andres@anarazel.de> writes:
> On 2017-01-17 13:43:38 -0500, Tom Lane wrote:
>> I'm not convinced that that optimization is worth preserving, but if we
>> keep it then ProjectSet isn't le mot juste here, any more than you'd want
>> to rename Result to Project without changing its existing
>> functionality.
> Right. I'd removed that, and re-added it; primarily because the plans
> looked more complex without it. After all, you'd thought it worth adding
> that hack ;) I'm happy with removing it again too.
Well, it seemed reasonable to do that as long as the only cost was ten or
so lines in create_projection_plan. But if we're contorting not only the
behavior but the very name of the SRF-evaluation plan node type, that's
not negligible cost anymore. So now I'm inclined to take it out.
regards, tom lane
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