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From "Wes McKinney (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARROW-602) C++: Provide iterator access to primitive elements inside a Column/ChunkedArray
Date Tue, 21 Mar 2017 14:43:42 GMT

    [ https://issues.apache.org/jira/browse/ARROW-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15934723#comment-15934723
] 

Wes McKinney commented on ARROW-602:
------------------------------------

It's also OK (and maybe simpler) to start a public Google document and link to on this issue


> C++: Provide iterator access to primitive elements inside a Column/ChunkedArray
> -------------------------------------------------------------------------------
>
>                 Key: ARROW-602
>                 URL: https://issues.apache.org/jira/browse/ARROW-602
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Uwe L. Korn
>              Labels: beginner, newbie
>
> Given a ChunkedArray, an Arrow user must currently iterate over all its chunks and then
cast them to their types to extract the primitive memory regions to access the values. A convenient
way to access the underlying values would be to offer a function that takes a ChunkedArray
and returns a C++ iterator over all elements.
> While this may not be the most performant way to access the underlying data, it should
have sufficient performance and adds a convenience layer for new users.



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