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Posted to jira@arrow.apache.org by "Weston Pace (Jira)" <ji...@apache.org> on 2021/01/05 08:38:00 UTC

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

     [ https://issues.apache.org/jira/browse/ARROW-9697?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weston Pace updated ARROW-9697:
-------------------------------
    Fix Version/s:     (was: 3.0.0)
                   4.0.0

> [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
>            Assignee: Weston Pace
>            Priority: Major
>              Labels: dataset
>             Fix For: 4.0.0
>
>
> 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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