Weston Pace created ARROW-16637:
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Summary: [C++] Add row-based utilities for encoding a batch and
merging row tables
Key: ARROW-16637
URL: https://issues.apache.org/jira/browse/ARROW-16637
Project: Apache Arrow
Issue Type: Sub-task
Components: C++
Reporter: Weston Pace
This PR adds a "row table" which is a high level API for a 2D structure that
has row-major storage. It adds utilities to encode to & from the existing
columnar structure via this high level API. Internally it uses RowTableImpl.
It also adds a merge utility that can merge two row tables together.
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