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Re: STRICT SQL functions never inline

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: STRICT SQL functions never inline
Date: 2011-11-09 00:29:34
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Josh Berkus <josh(at)agliodbs(dot)com> writes:
> After having some production issues, I did some testing and it seems
> that any SQL function declared STRICT will never inline.

It won't unless the planner can prove that the resulting expression
behaves the same, ie, is also strict for *all* the parameters.  Which
in most cases isn't true, or at least is very difficult to prove.
This is not a bug.

			regards, tom lane

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