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Posted to issues@arrow.apache.org by "Neal Richardson (Jira)" <ji...@apache.org> on 2020/08/11 21:22:00 UTC

[jira] [Created] (ARROW-9697) [C++][Dataset] num_rows method for Dataset/Scanner

Neal Richardson created ARROW-9697:
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             Summary: [C++][Dataset] num_rows method for Dataset/Scanner
                 Key: ARROW-9697
                 URL: https://issues.apache.org/jira/browse/ARROW-9697
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++
            Reporter: Neal Richardson
             Fix For: 2.0.0


Something like Scanner::ToTable except first Project to keep 0 columns, and for each record batch, grab the num_rows. Then sum the resulting vector.



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