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https://issues.apache.org/jira/browse/SPARK-29626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-29626:
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Affects Version/s: (was: 3.0.0)
3.1.0
> notEqual() should return true when the one is null, the other is not null
> -------------------------------------------------------------------------
>
> Key: SPARK-29626
> URL: https://issues.apache.org/jira/browse/SPARK-29626
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 3.1.0
> Reporter: zhouhuazheng
> Priority: Minor
>
> the one is null，the other is not null, then use the function notEqual(), we
> hope it return true .
> eg:
> scala> df.show()
> +------+-------+
> | age| name|
> +------+-------+
> | null|Michael|
> | 30| Andy|
> | 19| Justin|
> | 35| null|
> | 19| Justin|
> | null| null|
> |Justin| Justin|
> | 19| 19|
> +------+-------+
> scala> df.filter(col("age").notEqual(col("name"))).show
> +---+------+
> |age| name|
> +---+------+
> | 30| Andy|
> | 19|Justin|
> | 19|Justin|
> +---+------+
> scala> df.filter(col("age").equalTo(col("name"))).show
> +------+------+
> | age| name|
> +------+------+
> | null| null|
> |Justin|Justin|
> | 19| 19|
> +------+------+
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