Edoardo Vivo created SPARK-21160:
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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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