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https://issues.apache.org/jira/browse/ARROW-6378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16917991#comment-16917991
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Francois Saint-Jacques commented on ARROW-6378:
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We're thinking of yanking PartitionDataSource and make `GetKey()/SetKey()` part
of the DataSource interface directly. See
[https://github.com/apache/arrow/pull/5221]
> [C++][Dataset] Implement TreeDataSource
> ---------------------------------------
>
> Key: ARROW-6378
> URL: https://issues.apache.org/jira/browse/ARROW-6378
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Francois Saint-Jacques
> Assignee: Francois Saint-Jacques
> Priority: Major
> Labels: dataset
>
> The TreeDataSource is required to support partitions pruning of sub-trees.
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