Horton

Re: wip: functions median and percentile

Peter Eisentraut <peter_e@gmx.net>

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From: Peter Eisentraut <peter_e@gmx.net>
To: Pavel Stehule <pavel.stehule@gmail.com>
Cc: Greg Stark <gsstark@mit.edu>, Tom Lane <tgl@sss.pgh.pa.us>, Dean Rasheed <dean.a.rasheed@gmail.com>, Hitoshi Harada <umi.tanuki@gmail.com>, Robert Haas <robertmhaas@gmail.com>, David Fetter <david@fetter.org>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2010-10-13T10:48:17Z
Lists: pgsql-hackers 
On mån, 2010-10-11 at 20:46 +0200, Pavel Stehule wrote:
> The problem is in interface. The original patch did it, but I removed
> it. We cannot to unsure immutability of some parameters now.

How about you store the "immutable" parameter in the transition state
and error out if it changes between calls?