Github user dongjoon-hyun commented on the issue:

    https://github.com/apache/spark/pull/19129
  
    It's marked as 2.0.1 and 2.1.0 with the following commit logs.
    ```
    ~/s/spark-2.2:branch-2.0$ git log --oneline | grep SPARK-15639
    977fbbfcae [SPARK-15639] [SPARK-16321] [SQL] Push down filter at RowGroups 
level for parquet reader
    91dffcabde Revert "[SPARK-15639][SQL] Try to push down filter at RowGroups 
level for parquet reader"
    7d6bd11964 [SPARK-15639][SQL] Try to push down filter at RowGroups level 
for parquet reader
    ```
    
    Which section is proper?
    - Upgrading From Spark SQL 1.6 to 2.0
    - Upgrading From Spark SQL 2.0 to 2.1
    
    I think it's `Upgrading From Spark SQL 1.6 to 2.0`,  effectively.


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