Re: Tuning queries inside a function

Mike Nolan wrote:
>>>Maybe you could return a refcursor pointing to the EXPLAIN ANALYZE of
>>>the query inside the function.
>>
>>The raw materials exist to do this: if you know which elements of a
>>query will be replaced by plpgsql variables, you can duplicate the
>>results via
>>
>> PREPARE foo(...) AS ...
>> EXPLAIN EXECUTE foo(...)
>>
>>Certainly there is a lot more that we can and must do about making
>>it easier to debug and tune plpgsql functions. But you can fix 'em
>>with a little determination even now...
>
>
> If I know which elements of a query will be replaced by variables, I can
> enter the query in psql, which I've done. (I can always output the variables
> to the log from inside the function.)

Be aware that if you're pasting values in the place of the variables
then PG can come up with a different plan.

--
Richard Huxton
Archonet Ltd