Pengcheng Xiong created HIVE-8681:
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Summary: CBO: Column names are missing from join expression in Map
join with CBO enabled
Key: HIVE-8681
URL: https://issues.apache.org/jira/browse/HIVE-8681
Project: Hive
Issue Type: Improvement
Reporter: Pengcheng Xiong
Assignee: Pengcheng Xiong
On Hive 14 when CBO is enabled the column names are missing from the join
expression. Rather than to use external names "key", "value", some internal
names such as "_col0" or "_col1" are used. For map join with more than two
tables it is very hard to figure the actual join order. In this patch, I am
going to address this issue not only for join but also for all the other
operators. And it will also be addressed in not only CLI but also TEZ
environment.
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