[jira] [Resolved] (SPARK-19882) Pivot with null as the pivot value throws NPE

["Wenchen Fan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-19882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-19882.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.2.0

Issue resolved by pull request 17226
[https://github.com/apache/spark/pull/17226]

> Pivot with null as the pivot value throws NPE
> ---------------------------------------------
>
>                 Key: SPARK-19882
>                 URL: https://issues.apache.org/jira/browse/SPARK-19882
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Hyukjin Kwon
>             Fix For: 2.2.0
>
>
> This seems a regression.
> - Spark 1.6
> {code}
> Seq(Tuple1(None), Tuple1(Some(1))).toDF("a").groupBy($"a").pivot("a").count().show()
> {code}
> prints
> {code}
> +----+----+---+
> |   a|null|  1|
> +----+----+---+
> |null|   0|  0|
> |   1|   0|  1|
> +----+----+---+
> {code}
> - Current master
> {code}
> Seq(Tuple1(None), Tuple1(Some(1))).toDF("a").groupBy($"a").pivot("a").count().show()
> {code}
> prints
> {code}
> java.lang.NullPointerException was thrown.
> java.lang.NullPointerException
>   at org.apache.spark.sql.catalyst.expressions.aggregate.PivotFirst$$anonfun$4.apply(PivotFirst.scala:145)
>   at org.apache.spark.sql.catalyst.expressions.aggregate.PivotFirst$$anonfun$4.apply(PivotFirst.scala:143)
>   at scala.collection.immutable.List.map(List.scala:273)
>   at org.apache.spark.sql.catalyst.expressions.aggregate.PivotFirst.<init>(PivotFirst.scala:143)
>   at org.apache.spark.sql.catalyst.analysis.Analyzer$ResolvePivot$$anonfun$apply$7$$anonfun$24.apply(Analyzer.scala:509)
> {code}



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