Re: Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling)

Hi Tom,

On 2016-09-14 19:28:25 -0400, Tom Lane wrote:
> Andres Freund <andres(at)anarazel(dot)de> writes:
> > On 2016-09-12 19:35:22 -0400, Tom Lane wrote:
> >> Anyway I'll draft a prototype and then we can compare.
>
> > Ok, cool.
>
> Here's a draft patch that is just meant to investigate what the planner
> changes might look like if we do it in the pipelined-result way.
> Accordingly, I didn't touch the executor, but just had it emit regular
> Result nodes for SRF-execution steps. However, the SRFs are all
> guaranteed to appear at top level of their respective tlists, so that
> those Results could be replaced with something that works like
> nodeFunctionscan.

> So I think we should continue investigating this way of doing things.
> I'll try to take a look at the executor end of it tomorrow. However
> I'm leaving Friday for a week's vacation, and may not have anything to
> show before that.

Are you planning to work on the execution side of things? I otherwise
can take a stab...

Greetings,

Andres Freund