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https://issues.apache.org/jira/browse/ARROW-6940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17286005#comment-17286005
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David Li commented on ARROW-6940:
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[~apitrou] sorry, what's the context for this ping? It looks like there's a few
things left to do:
* Expose custom_metadata from the record batch reader/writer
* Implement it in Flight (possibly doing the (de)compression in the background
to avoid blocking the consumer/producer)
I could take a look at it when I get to trying compression with Flight.
> [C++] Expose Message-level IPC metadata in both read and write interfaces
> -------------------------------------------------------------------------
>
> Key: ARROW-6940
> URL: https://issues.apache.org/jira/browse/ARROW-6940
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 4.0.0
>
>
> the Message flatbuffer type has {{custom_metadata}} but there is no API
> support for reading and writing values to this field.
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