2010/10/13 Peter Eisentraut <peter_e@gmx.net>:
> 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?
>
yes, it's possibility. Now I looking there and I see the as more
important problem the conformance with ANSI SQL. see my last post.
There can be a kind of aggregate functions based on tuplesort.
Regards
Pavel
>