zhoukang created SPARK-23665:

             Summary: Add adaptive algorithm to select query result collect 
                 Key: SPARK-23665
                 URL: https://issues.apache.org/jira/browse/SPARK-23665
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.0, 2.1.1
            Reporter: zhoukang

Currently, we use configuration like 
to specify query result collect method.
Actually,we can estimate the size of the result and select collect method 

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