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Posted to jira@arrow.apache.org by "Ben Kietzman (Jira)" <ji...@apache.org> on 2021/05/05 20:59:00 UTC

[jira] [Resolved] (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 ]

Ben Kietzman resolved ARROW-9697.
---------------------------------
    Resolution: Fixed

Issue resolved by pull request 10060
[https://github.com/apache/arrow/pull/10060]

> [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: David Li
>            Priority: Major
>              Labels: dataset, pull-request-available
>             Fix For: 5.0.0
>
>          Time Spent: 2h
>  Remaining Estimate: 0h
>
> 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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