Re: [I] [C++][Python] `list_sort` - sorting individual ListScalars [arrow]

["raisadz (via GitHub)" <gi...@apache.org>]

raisadz commented on issue #48060:
URL: https://github.com/apache/arrow/issues/48060#issuecomment-3510653418

   > I'm slightly surprised we don't have this yet, not even as an aggregation. It would be nice to add it as a C++ kernel indeed.
   > 
   > [@raisadz](https://github.com/raisadz) for the min/max/mean/median/sum, you could use [aggregation kernels](https://arrow.apache.org/docs/cpp/compute.html#aggregations), though I'm sure this can be done more efficiently working directly on the ListArray:
   > 
   > import pyarrow as pa
   > import pyarrow.compute as pc
   > arr = pa.array([[1, 2, None, 0], [7, 7, None, 0], [1, 2, 3]])
   > offsets = pc.list_parent_indices(arr)
   > table = pa.Table.from_arrays([arr.values, offsets], names=["values", "offsets"])
   > table.group_by(["offsets"]).aggregate([("values", "min")])
   > 
   > pyarrow.Table
   > offsets: int64
   > values_min: int64
   > ----
   > offsets: [[0,1,2]]
   > values_min: [[0,0,1]]
   
   Thanks a lot for pointing me to the aggregation kernels @rok, it seems to work well for my task!


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