thisisnic
commented
1 year ago We don't currently support window functions. There are a few blockers before we're there, most of which are in #32991, though I don't think anyone is looking at those at the moment, so while I'd love to see them, I don't think it's something we're likely to have any time soon.
See https://github.com/apache/arrow/issues/34201#issuecomment-1454307957 for more details around this.
Describe the enhancement requested
i.e. functions like rolling mean, min, max, etc.
In https://github.com/r-lib/slider/issues/195 I got a request for rolling window functions to work with arrow backends. I have a feeling the way that would work (if it existed) was for arrow to translate something like
mutate(df, mean = slide_mean(col, before = 3))internally to something the C++ engine understands.But I'm not sure if arrow supports rolling functions at all, so this is also more of a discussion issue to figure out if that was on the roadmap
Component(s)
R