Uwe L. Korn created ARROW-1734:
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Summary: 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 L. Korn
Assignee: Uwe L. Korn
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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