Yin Huai created SPARK-6366:
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             Summary: In Python API, the default save mode for save and 
saveAsTable should be "error" instead of "append".
                 Key: SPARK-6366
                 URL: https://issues.apache.org/jira/browse/SPARK-6366
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Yin Huai


If a user want to append data, he/she should explicitly specify the save mode. 
Also, in Scala and Java, the default save mode is ErrorIfExists.



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