Re: An issue in remote query optimization

On Tue, Jan 31, 2017 at 2:25 AM, Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp>
wrote:

> 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?
>

No.

analyze ts.tickets;
WARNING: skipping "tickets" --- cannot analyze this foreign table
ANALYZE

>
> Best regards,
> Etsuro Fujita
>
>
>

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