Windowing functions - future plans

[Thomas Kellerer]

Hi,

I was wondering if there are plans to extend the window framing clause to allow the number of rows in the frame to be specified.

Something like:

ROWS BETWEEN 5 PRECEDING AND 5 FOLLOWING

I did find a comment on the TODO list regarding the framing clause ("Implement full support for window framing clauses") but the explanation did not mention allowing a number instead of UNBOUND for the frame definition.

Oracle and DB2 do support this syntax ;)

Regards
Thomas


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[David Fetter]

On Sun, Nov 01, 2009 at 12:04:32PM +0100, Thomas Kellerer wrote:

> Hi,
>
> I was wondering if there are plans to extend the window framing
> clause to allow the number of rows in the frame to be specified.
>
> Something like:
>
> ROWS BETWEEN 5 PRECEDING AND 5 FOLLOWING
>
> I did find a comment on the TODO list regarding the framing clause
> ("Implement full support for window framing clauses") but the
> explanation did not mention allowing a number instead of UNBOUND for
> the frame definition.
>
> Oracle and DB2 do support this syntax ;)

Patches welcome :)

Cheers,
David.
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