Re: return MAX and when it happened

Sam Mason wrote:
> On Wed, Nov 19, 2008 at 05:06:14PM -0600, Scara Maccai wrote:
>
>> I think I wrote it, but there's something I don't get from the docs: do
>> I have to call
>>
>> get_call_result_type(fcinfo, NULL, &tupdesc)
>>
>
> I've always tried to stay away from C level extensions so far! How
> many records are you expecting to aggregate across? If it's only a few
> thousand a simple SQL language function may be ok:
>

It's going to be used in millions of records.
That's why I went straight to the C implementation. But your SQL
function is a lot easier to read.

> Sorry I can't be of more help!
>
You helped me a lot, thank you.

Anyone can answer me?
Do I have to call

get_call_result_type

every time or I can just call it the first time? I don't think the docs
are very clear in case of a function returning 1 Composite Type.