Zoltan Haindrich commented on HIVE-19009:

sure, seems like I've forgot to add the link to the reviewboard earlier: 

* reoptimization also works if the query is vectorized
* collection rules were too strict; there are cases when in the same query the 
same subtree is calculated multiple times
* added session level storage

> Retain and use runtime statistics thru out a session
> ----------------------------------------------------
>                 Key: HIVE-19009
>                 URL: https://issues.apache.org/jira/browse/HIVE-19009
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-19009.01.patch, HIVE-19009.02.patch

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