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Posted to issues@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2021/10/07 10:14:00 UTC

[jira] [Created] (ARROW-14251) [C++] Allow counting sort to work with indirect indexing

Antoine Pitrou created ARROW-14251:
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             Summary: [C++] Allow counting sort to work with indirect indexing
                 Key: ARROW-14251
                 URL: https://issues.apache.org/jira/browse/ARROW-14251
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Antoine Pitrou


Currently, our array counting sort assumes the indices are trivially ascending on input (as generated by {{std::iota}}). This prevents it from being used in {{ConcreteRecordBatchColumnSorter}}.

Allowing counting sort to be used there may improve performance, though that must be measured.



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