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https://issues.apache.org/jira/browse/ARROW-1734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rok Mihevc updated ARROW-1734:
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External issue URL: https://github.com/apache/arrow/issues/17739
> C++/Python: Add cast function on Column-level
> ---------------------------------------------
>
> Key: ARROW-1734
> URL: https://issues.apache.org/jira/browse/ARROW-1734
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++, Python
> Reporter: Uwe Korn
> Assignee: Wes McKinney
> Priority: Major
> Fix For: 0.8.0
>
>
> Add a {{Cast}} function on a column level that casts all underlying arrays.
> There are three possible options we could implement:
> * Make a special cast implementation that takes a ChunkedArray and returns a
> simple Array
> * Make a universal implementation that takes a ChunkedArray and applies a
> Kernel on each Array, returning a ChunkedArray with the same chunking
> * Make a universal implementation that takes a ChunkedArray and applies a
> Kernel on each Array, returning a plain Array with no chunking
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