| From: | Salvador Fandiño <sfandino(at)gmail(dot)com> |
|---|---|
| To: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Saving SRF context |
| Date: | 2016-03-12 11:59:16 |
| Message-ID: | 56E40494.3050305@gmail.com |
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| Lists: | pgsql-hackers |
On 03/11/2016 09:19 PM, Salvador Fandiño wrote:
> Hi,
>
> I have implemented a SRF[*] that returns rows one by one (using
> ExprMultipleResult). But now I need to save somewhere some context
> information between calls pertaining to the same result set and I am
> unable to find a proper place for that.
>
> I have seen that cfinfo->flinfo->fn_extra is available, but if I
> understand the mechanics of FmgrInfo correctly, that structure is not
> unique for call frame. It could be shared between several cfinfo
> structures and would be crushed on recursion (I plan to use SPI from my
> function).
>
> So, is that right? should I build a stack there? is there any other
> place where to store context information relative to a SRF call frame?
Replying to myself, pretty much I wanted to know is documented here:
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