[jira] [Created] (HIVE-11800) GenMapRedWalker in MapReduceCompiler.java seems not efficient

[Aihua Xu (JIRA)]

Aihua Xu created HIVE-11800:
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             Summary: GenMapRedWalker in MapReduceCompiler.java seems not 
efficient
                 Key: HIVE-11800
                 URL: https://issues.apache.org/jira/browse/HIVE-11800
             Project: Hive
          Issue Type: Sub-task
          Components: Logical Optimizer
            Reporter: Aihua Xu


Investigate the implementation of GenMapRedWalker in MapReduceCompiler.java to 
see if the performance can be improved. 



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