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https://issues.apache.org/jira/browse/ARROW-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15929977#comment-15929977
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Uwe L. Korn commented on ARROW-602:
-----------------------------------
A chunked array is just a collection of arrays of the same type, so we should
be able to construct instances of {{std::iterator<int64_t, ...>}}. The iterator
would then iterate over all the values in all these underlying arrays.
As Arrow arrays are nullable, the iterator must either be on {{std::pair<bool,
value_type>}} or we would have to specify that the iterator only iterates over
all non-null values.
> 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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