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From "wangzhenhua (G)" <wangzhen...@huawei.com>
Subject hive cbo calciteplanner
Date Wed, 17 Jun 2015 01:12:00 GMT
Hi all,

I'm reading the source code of Hive cbo (CalcaitePlanner), but I find it hard to follow.
Listed below are some of the questions:
1. What's the relationship between HepPlanner and HiveVolcanoPlanner?
2. I don't have a clue about these concepts: clusters, traitDef and collectGarbage().

Thanks for any help.

________________________________
best regards,
-zhenhua

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