hive cbo calciteplanner

[wangzhenhua (G)]

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

[hive building error] can't download pentaho-aggdesigner-algorithm-5.1.5-jhyde.pom

[wangzhenhua (G)]

Hi, all,

When I build hive source using Maven, it gets stuck in:
Downloading: 
http://ec2-50-18-79-139.us-west-1.compute.amazonaws.com/data/spark_2.10-1.3-rc1/org/pentaho/pentaho-aggdesigner-algorithm/5.1.5-jhyde/pentaho-aggdesigner-algorithm-5.1.5-jhyde.pom;,
and I can't connect to the server 
http://ec2-50-18-79-139.us-west-1.compute.amazonaws.com/.
I'm using the spark branch.

Thank you for any help.


best regards,
zhenhua