facebook/presto — pull request #999 by miniway (2014-02-04 19:23:12+00:00)
Title: Window function argruments

The window function cannot accept additional parameters now.

At the first implementation of pull request, I changed processRow so that it can accept additional function parameters.

But I thought that some window functions might want to lookup other rows within the same partition.

I guess the window function interface could be dramatically changed at a future implementations but hope this pull request to be a start of the changes.