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Posted to issues@arrow.apache.org by "Licht Takeuchi (JIRA)" <ji...@apache.org> on 2017/11/13 15:45:01 UTC

[jira] [Commented] (ARROW-971) [C++/Python] Implement Array.isvalid/notnull/isnull

    [ https://issues.apache.org/jira/browse/ARROW-971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16249741#comment-16249741 ] 

Licht Takeuchi commented on ARROW-971:
--------------------------------------

[~wesmckinn] Is this already implemented in C++?
https://github.com/apache/arrow/blob/e8331f46f8b324271e694557789ea53b082fdc05/cpp/src/arrow/array.h#L185

> [C++/Python] Implement Array.isvalid/notnull/isnull
> ---------------------------------------------------
>
>                 Key: ARROW-971
>                 URL: https://issues.apache.org/jira/browse/ARROW-971
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Python
>            Reporter: Wes McKinney
>             Fix For: 0.9.0
>
>
> For arrays with nulls, this amounts to returning the validity bitmap. Without nulls, an array of all 1 bits must be constructed. For isnull, the bits must be flipped (in this case, the un-set part of the new bitmap must stay 0, though).



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