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https://issues.apache.org/jira/browse/SPARK-31553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17091490#comment-17091490
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Maxim Gekk commented on SPARK-31553:
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I am working on the issue
> Wrong result of isInCollection for large collections
> ----------------------------------------------------
>
> Key: SPARK-31553
> URL: https://issues.apache.org/jira/browse/SPARK-31553
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0, 3.1.0
> Reporter: Maxim Gekk
> Priority: Major
>
> If the size of a collection passed to isInCollection is bigger than
> spark.sql.optimizer.inSetConversionThreshold, the method can return wrong
> results for some inputs. For example:
> {code:scala}
> val set = (0 to 20).map(_.toString).toSet
> val data = Seq("1").toDF("x")
> println(set.contains("1"))
> data.select($"x".isInCollection(set).as("isInCollection")).show()
> {code}
> {code}
> true
> +--------------+
> |isInCollection|
> +--------------+
> | false|
> +--------------+
> {code}
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