Re: [HACKERS] An issue in remote query optimization

On 2017/01/31 18:24, Abbas Butt wrote:
> Postgres_fdw optimizes remote queries by pushing down the where clause.
> This feature does not work consistently when the query is executed from
> within a pl/pgsql function. The optimization works when the function
> executes the query for the first 5 times, and fails afterwards.

> I understand that this is because PostgreSQL starts using generic plan
> with pulled up where clause after the 5th invocation hoping that it
> would be faster since we have skiped planning the query on each
> invocation, but in this case this decision is causing the query to slow
> down.
>
> How should we fix this problem?

ANALYZE for the foreign table doesn't work?

Best regards,
Etsuro Fujita