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https://issues.apache.org/jira/browse/HIVE-22983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17068398#comment-17068398
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Zoltan Haindrich commented on HIVE-22983:
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+1
> Fix the comments on ConstantPropagate
> -------------------------------------
>
> Key: HIVE-22983
> URL: https://issues.apache.org/jira/browse/HIVE-22983
> Project: Hive
> Issue Type: Improvement
> Components: Logical Optimizer
> Reporter: Zhihua Deng
> Assignee: Zhihua Deng
> Priority: Minor
> Labels: pull-request-available
> Attachments: HIVE-22983.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The constantPropagate traverse the DAG from root to child, the child won’t
> start until all his parents have been visited.
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