[jira] [Commented] (ARROW-12965) [Java][C++] Java implementation of Arrow C data interface

["Roee Shlomo (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-12965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17422362#comment-17422362 ] 

Roee Shlomo commented on ARROW-12965:
-------------------------------------

We noticed that for UnionArray the cpp implementation includes a validity buffer although it shouldn't be there according to the specification. In the arrow2 rust implementation a workaround is used (in the FFI code for Union an empty validity buffer is explicitly added). To me it sounds like a bug that should be resolved in arrow-cpp instead. [~apitrou] Should we try to workaround it in Java too or open a bug ticket?

> [Java][C++] Java implementation of Arrow C data interface
> ---------------------------------------------------------
>
>                 Key: ARROW-12965
>                 URL: https://issues.apache.org/jira/browse/ARROW-12965
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Java
>            Reporter: Hongze Zhang
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 12h 10m
>  Remaining Estimate: 0h
>
> As mentioned in ARROW-7272 or in PR https://github.com/apache/arrow/pull/10201, it would be valuable to have the Arrow C data interface implemented in Java to provide better inter-process data sharing facility without depending on 3rd party serialization protocols.



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