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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2017/11/27 21:21:00 UTC

[jira] [Resolved] (ARROW-1573) [C++] Implement stateful kernel function that uses DictionaryBuilder to compute dictionary indices

     [ https://issues.apache.org/jira/browse/ARROW-1573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney resolved ARROW-1573.
---------------------------------
    Resolution: Fixed
      Assignee: Wes McKinney

This was done in ARROW-1559. The API is in https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/kernels/hash.h#L38

> [C++] Implement stateful kernel function that uses DictionaryBuilder to compute dictionary indices
> --------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-1573
>                 URL: https://issues.apache.org/jira/browse/ARROW-1573
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
>              Labels: Analytics
>
> An operator utilizing this kernel may need some way to indicate to multithreaded schedulers that it cannot be parallelized on chunked arrays (unless we implement a concurrent hash table)



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