Re: Query slow as Function

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От Andrew Dunstan
Тема Re: Query slow as Function
Дата
Msg-id 4F3FD4AE.30908@dunslane.net
обсуждение исходный текст
Ответ на Re: Query slow as Function  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Query slow as Function  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-performance

On 02/18/2012 11:37 AM, Tom Lane wrote:
> Andreas Kretschmer<akretschmer@spamfence.net>  writes:
>> You can check the plan with the auto_explain - Extension, and you can
>> force the planner to create a plan based on the actual input-value by
>> using dynamic SQL (EXECUTE 'your query string' inside the function)
> Steve *is* using EXECUTE, so that doesn't seem to be the answer.  I'm
> wondering about datatype mismatches myself --- the function form is
> forcing the parameter to be char(9), which is not a constraint imposed
> in the written-out query.  There are lots of other possibilities
> though.  It would be hard to say much without a self-contained example
> to try.
>
>

He's using EXECUTE ... USING. Does that plan with the used parameter?

cheers

andrew

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