[jira] [Created] (SPARK-21160) Filtering rows with "not equal" operator yields unexpected result with null rows

["Edoardo Vivo (JIRA)" <ji...@apache.org>]

Edoardo Vivo created SPARK-21160:
------------------------------------

             Summary: Filtering rows with "not equal" operator yields unexpected result with null rows
                 Key: SPARK-21160
                 URL: https://issues.apache.org/jira/browse/SPARK-21160
             Project: Spark
          Issue Type: Bug
          Components: PySpark, Spark Core, SQL
    Affects Versions: 2.0.2
            Reporter: Edoardo Vivo
            Priority: Minor


```
schema = StructType([StructField("Test", DoubleType())])
test2 = spark.createDataFrame([[1.0],[1.0],[2.0],[2.0],[None]], schema=schema)
test2.where("Test != 1").show()
```
This returns only the rows with the value 2, it does not return the null row. This should not be the expected behavior, IMO. 
Thank you.




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