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https://issues.apache.org/jira/browse/HIVE-26986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17789079#comment-17789079
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Denys Kuzmenko commented on HIVE-26986:
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[~seonggon], could you please clarify, do we have a correctness issue with
query71? If not, let's close HIVE-26660 or remove the link from the current
ticket since it's only about performance.
> A DAG created by OperatorGraph is not equal to the Tez DAG.
> -----------------------------------------------------------
>
> Key: HIVE-26986
> URL: https://issues.apache.org/jira/browse/HIVE-26986
> Project: Hive
> Issue Type: Sub-task
> Affects Versions: 4.0.0-alpha-2
> Reporter: Seonggon Namgung
> Assignee: Seonggon Namgung
> Priority: Major
> Labels: pull-request-available
> Attachments: Query71 OperatorGraph.png, Query71 TezDAG.png
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> A DAG created by OperatorGraph is not equal to the corresponding DAG that is
> submitted to Tez.
> Because of this problem, ParallelEdgeFixer reports a pair of normal edges to
> a parallel edge.
> We observe this problem by comparing OperatorGraph and Tez DAG when running
> TPC-DS query 71 on 1TB ORC format managed table.
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