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https://issues.apache.org/jira/browse/HIVE-9372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14278213#comment-14278213
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Rui Li commented on HIVE-9372:
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[~xuefuz] - right... I just didn't realize it could take this long
> Parallel checking non-combinable paths in CombineHiveInputFormat
> ----------------------------------------------------------------
>
> Key: HIVE-9372
> URL: https://issues.apache.org/jira/browse/HIVE-9372
> Project: Hive
> Issue Type: Improvement
> Reporter: Rui Li
> Assignee: Rui Li
> Attachments: HIVE-9372.1.patch, HIVE-9372.2.patch
>
>
> Checking if an input path is combinable is expensive. So we should make it
> parallel.
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