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Re: Query slow as Function

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andreas Kretschmer <akretschmer(at)spamfence(dot)net>
Cc: Steve Horn <steve(at)stevehorn(dot)cc>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Query slow as Function
Date: 2012-02-18 16:37:22
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Andreas Kretschmer <akretschmer(at)spamfence(dot)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.

			regards, tom lane

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