Re: Partitions are not excluded in stored procedures

On 05/06/2012 17:55, Tom Lane wrote:

Ioannis Anagnostopoulos<ioannis@anatec.com>  writes:

I came across the following problem. Say I have a select query that
given the appropriate where clauses it will only query the correct
partitioned tables and not all of them.  That can be examined by using
the EXPLAIN. However the same select query used in a stored procedure
will transverse all the tables regardless of the where clause parameters
passed by the user as variables of the stored procedure . Is there any
work around other than composing an EXECUTE "select ....."?

Yeah, if the WHERE clauses that correspond to the partitioning
constraints contain parameters, the planner can't prove the exclusions
hold.  So you have to use EXECUTE to get a one-shot plan.  This will
be better in 9.2 (which, basically, will automatically recognize that
it needs to use one-shot plans).

            regards, tom lane

When you say better in 9.2 you mean that we will be able to avoid the EXECUTE, and the plan will be, more or less, calculated per call without great performance hit?

Regards and thank you
Yiannis