Zoltan Haindrich created HIVE-18564:
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Summary: 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
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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