Wes McKinney created ARROW-4083:
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Summary: [C++] Allowing ChunkedArrays to contain a mix of
DictionaryArray and dense Array (of the dictionary type)
Key: ARROW-4083
URL: https://issues.apache.org/jira/browse/ARROW-4083
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Wes McKinney
Fix For: 0.13.0
In some applications we may receive a stream of some dictionary encoded data
followed by some non-dictionary encoded data. For example this happens in
Parquet files when the dictionary reaches a certain configurable size threshold.
We should think about how we can model this in our in-memory data structures,
and how it can flow through to relevant computational components (i.e. certain
data flow observers -- like an Aggregation -- might need to be able to process
either a dense or dictionary encoded version of a particular array in the same
stream)
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