rtpsw commented on code in PR #34311:
URL: https://github.com/apache/arrow/pull/34311#discussion_r1117883531
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cpp/src/arrow/compute/exec.h:
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@@ -240,6 +246,8 @@ struct ARROW_EXPORT ExecBatch {
ExecBatch Slice(int64_t offset, int64_t length) const;
+ Result<ExecBatch> SelectValues(const std::vector<int>& ids) const;
Review Comment:
Regular aggregation works differently - it uses encoders that compute a hash
for the selected keys. The segmenter doesn't use encoders.
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