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https://issues.apache.org/jira/browse/ARROW-10440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17299773#comment-17299773
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Weston Pace commented on ARROW-10440:
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Yes, it should be able to satisfy your use case, now that you've mentioned the
need here. Right now a `FileWriter` only has the `schema` which wouldn't have
the path being written but it seems reasonable that it could have a path
accessor as well. [~bkietz] can you confirm?
> [C++][Dataset][Python] Add a callback to visit file writers just before
> Finish()
> --------------------------------------------------------------------------------
>
> Key: ARROW-10440
> URL: https://issues.apache.org/jira/browse/ARROW-10440
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 2.0.0
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Major
> Fix For: 5.0.0
>
>
> This will fill the role of (for example) {{metadata_collector}} or allow
> stats to be embedded in IPC file footer metadata.
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