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https://issues.apache.org/jira/browse/SPARK-38790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vishnu K Suman updated SPARK-38790:
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Attachment: image-2022-04-05-22-21-27-695.png
> Unexpected behaviour for "IN" operator in spark when null is involved in array
> ------------------------------------------------------------------------------
>
> Key: SPARK-38790
> URL: https://issues.apache.org/jira/browse/SPARK-38790
> Project: Spark
> Issue Type: Bug
> Components: Spark Core, SQL
> Affects Versions: 3.2.1
> Environment: Tested on pyspark 3.2.1
> Reporter: Vishnu K Suman
> Priority: Major
> Attachments: image-2022-04-05-22-21-27-695.png
>
>
> ```
> >>> spark.sql('SELECT 1 in (null, 1)').show()
> +----------------+
> |(1 IN (NULL, 1))|
> +----------------+
> | true|
> +----------------+
> >>> spark.sql('SELECT 1 in (null, 2)').show()
> +----------------+
> |(1 IN (NULL, 2))|
> +----------------+
> | null|
> +----------------+
> ```
> in operator in spark.sql is giving unexpected results
> 1 in (null, 1) => true
> 1 in (null, 2) = null
> I would have expected the second piece of code to throw false.
>
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