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https://issues.apache.org/jira/browse/HIVE-18564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich reassigned HIVE-18564:
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> Add a mapper to make plan transformations more easily understandable
> --------------------------------------------------------------------
>
> Key: HIVE-18564
> URL: https://issues.apache.org/jira/browse/HIVE-18564
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
>
> This part is started as a small helper class to enable plan independent
> mapping of runtime operator informations. But in reality its a bit different;
> and might have its own different kind of usages.
> Goals were:
> * connect plan pieces which are responsible for the same part together;
> currently I'm using it to connect RelNode, AST, Operator, RuntimeStats
> * make it easy to attach new data
> * make it easy to lookup some related information
> This concept seems to be also usefull during writing tests; because it
> enables the lookup of specific pieces like HiveFilter
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