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https://issues.apache.org/jira/browse/ARROW-7512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17026878#comment-17026878
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Antoine Pitrou commented on ARROW-7512:
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cc [~wesm]
> [C++] Dictionary memo missing elements in id_to_dictionary_ map after
> deserialization
> -------------------------------------------------------------------------------------
>
> Key: ARROW-7512
> URL: https://issues.apache.org/jira/browse/ARROW-7512
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Affects Versions: 0.15.0
> Reporter: Wamsi Viswanath
> Priority: Major
>
> `id_to_dictionary_` map is empty after de-serialization of schema using
> ReadSchema method.
> An example for reproduction:
> [https://gist.github.com/wamsiv/77dc1db44b5805828172e6c94d61d2d9]
> I see that it is probably being missed here:
> https://github.com/apache/arrow/blob/master/cpp/src/arrow/ipc/metadata_internal.cc#L804
> Please let me know if the behavior is expected and if so then how the client
> is expected to have dictionary array values?
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