Wes McKinney created ARROW-6883:
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             Summary: [C++] Support sending delta DictionaryBatch or 
replacement DictionaryBatch in IPC stream writer class
                 Key: ARROW-6883
                 URL: https://issues.apache.org/jira/browse/ARROW-6883
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++
            Reporter: Wes McKinney
             Fix For: 1.0.0


I didn't see other JIRA issues about this, but this is one significant matter 
to have complete columnar format coverage in the C++ library.

This functionality will flow through to the various bindings, so it would be 
helpful to add unit tests to assert that things work correctly e.g. in Python 
from an end-user perspective



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