Hi all, I'm studying CBO code in hive. I have a question about bushy join optimization.
Bushy join did get introduced in hive via HIVE-7577 <https://issues.apache.org/jira/browse/HIVE-7577>, and played an important role in optimizing several queries in TPCDS benchmark. Somehow I saw the bushy join rule was removed in HIVE-7687 <https://issues.apache.org/jira/browse/HIVE-7687>, and didn't find much comment about the removal. I wonder if the bushy join is totally gone from hive trunk? And if so, why is that? Or did I miss anything? Thanks in advance. *Rossi*
