Postgres' DISTINCT ON clause is an example of a window function, though as
it stands today it seems to be a special-case hack, instead of an example
of a more generalized feature.
On Thu, 24 Aug 2006, AgentM wrote:
>
> On Aug 24, 2006, at 14:11 , Alvaro Herrera wrote:
>
>> Karen Hill wrote:
>>
>>> It would be really great if PostgreSQL supported SQL:2003 Window
>>> functions. I know that oracle and sql server have them already, so it
>>> would make postgres competitive in that area. I know there is a
>>> feature freeze for 8.2, is it doable for 8.3?
>>
>> The sooner you start writing a patch, the sooner you will be done ;-)
>>
>> I agree it would be nice to have them, but currently I don't think
>> there's anyone working on'em.
>
> Could someone elaborate on the window functions? This page
> http://en.wikipedia.org/wiki/SELECT has some examples but they make it seem
> like the functions are an overly-verbose LIMIT statement. So what's the
> benefit?
>
> -M
>
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