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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/10/08 21:27:22 UTC

[GitHub] [arrow] rtpsw commented on pull request #14352: ARROW-17642: [C++] Add ordered aggregation

rtpsw commented on PR #14352:
URL: https://github.com/apache/arrow/pull/14352#issuecomment-1272400060

   This PR implements a generalization of ordered aggregation called segmented aggregation, in which the segment-keys split the input rows into segments of consecutive rows with common values for these segment-keys. In other words, the extra keys are not required to be ordered but only to change from one segment to the next. I opted to generalize this way because the extra implementation effort is quite small and the result is useful.


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