Code cleanup: refactor the 4 methods like
SemanticAnalyzer.genGroupByPlanGroupByOperator
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Key: HIVE-548
URL: https://issues.apache.org/jira/browse/HIVE-548
Project: Hadoop Hive
Issue Type: Improvement
Reporter: Zheng Shao
We have 4 methods to generate the GroupByOperators in the SemanticAnalyzer:
{code}
SemanticAnalyzer.genGroupByPlanGroupByOperator
SemanticAnalyzer.genGroupByPlanMapGroupByOperator
SemanticAnalyzer.genGroupByPlanGroupByOperator1
SemanticAnalyzer.genGroupByPlanGroupByOperator2
{code}
While they are all different, a substantial portion of them are the same. We
should factor out all the common functionality into shared functions.
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