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Posted to dev@arrow.apache.org by "Wes McKinney (Jira)" <ji...@apache.org> on 2020/06/04 14:15:00 UTC

[jira] [Created] (ARROW-9034) [C++] Implement binary (two bitmap) version of BitBlockCounter

Wes McKinney created ARROW-9034:
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             Summary: [C++] Implement binary (two bitmap) version of BitBlockCounter
                 Key: ARROW-9034
                 URL: https://issues.apache.org/jira/browse/ARROW-9034
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++
            Reporter: Wes McKinney
            Assignee: Wes McKinney
             Fix For: 1.0.0


The current BitBlockCounter from ARROW-9029 is useful for unary operations. Some operations involve multiple bitmaps and so it's useful to be able to determine the block popcounts of the AND of the respective words in the bitmaps. So each returned block would contain the number of bits that are set in both bitmaps at the same locations



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