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https://issues.apache.org/jira/browse/HIVE-19237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16495216#comment-16495216
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Zoltan Haindrich commented on HIVE-19237:
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I've demoted the set to a simple String;
now that you mention it...I think it would be probably better to clear the
branchingOp instead of the roots and the find the roots in that tree...that way
there would be no need for the marker or anything....
> Only use an operatorId once in a plan
> -------------------------------------
>
> Key: HIVE-19237
> URL: https://issues.apache.org/jira/browse/HIVE-19237
> Project: Hive
> Issue Type: Bug
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-19237.01.patch, HIVE-19237.02.patch,
> HIVE-19237.03.patch, HIVE-19237.04.patch, HIVE-19237.05.patch,
> HIVE-19237.05.patch, HIVE-19237.06.patch, HIVE-19237.07.patch
>
>
> Column stats autogather plan part is added from a plan compiled by the driver
> itself; however that driver starts to use operatorIds from 1 ; so it's
> possible that 2 SEL_1 operators end up in the same plan...
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