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https://issues.apache.org/jira/browse/HIVE-16653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16007182#comment-16007182
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Vineet Garg commented on HIVE-16653:
------------------------------------

{code} if (stack.size() < 2 || !(stack.get(stack.size() - 2) instanceof 
DummyStoreOperator)) {code} If stack happens to be empty (not sure if it could 
be) second condition will throw an error. May be it is a good idea to 
check/assert if stack is not empty.

> Mergejoin should give itself a correct tag
> ------------------------------------------
>
>                 Key: HIVE-16653
>                 URL: https://issues.apache.org/jira/browse/HIVE-16653
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-16653.01.patch
>
>




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