Re: How to prohibit parallel scan through tableam?

On 27.11.2019 15:12, Rafia Sabih wrote:
>
>
> On Wed, 27 Nov 2019 at 12:33, Konstantin Knizhnik 
> <k.knizhnik@postgrespro.ru <mailto:k.knizhnik@postgrespro.ru>> wrote:
>
>     Hi hackers,
>
>     I wonder how it is possible to prohibit parallel scan for the
>     external
>     storage accessed through tableam?
>     For example if I want to implement specialized tableam for fast
>     access
>     to temp tables, how can I inform optimizer that
>     parallel scan is not possible (because table data is local to the
>     backend)?
>
>  How about setting parallel_setup_cost to disable_cost in costsize.c 
> for your specific scan method.

How can I do it if i just implementing my AM and not going to change any 
postgres code?

-- 
Konstantin Knizhnik
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company