Re: Possible problem in Custom Scan API

On Wed, Apr 12, 2017 at 12:59 AM, Dmitry Ivanov <d(dot)ivanov(at)postgrespro(dot)ru>
wrote:

> Tom Lane wrote:
>
>> Uh, no, construction of a custom plan node is entirely driven by the
>> PlanCustomPath method as far as I can see. You're free to ignore what
>> create_scan_plan did and insert your own tlist.
>>
>
> Are you sure? Even if it's true, this targetlist should still contain each
> and every Var that's been requested. If I'm correct, the only way to ensure
> that is to call build_path_tlist(), which is static (oops!). Perhaps I
> could make my own, but it uses replace_nestloop_params() (again, static),
> and the problem goes further and further.
>

As I understand, making build_path_tlist a non-static function would solve
the problem.
Tom, do you think it's possible?

------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company