[jira] [Updated] (FLINK-20989) Functions in ExplodeFunctionUtil should handle null data to avoid NPE

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-20989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated FLINK-20989:
-----------------------------------
    Labels: pull-request-available  (was: )

> Functions in ExplodeFunctionUtil should handle null data to avoid NPE
> ---------------------------------------------------------------------
>
>                 Key: FLINK-20989
>                 URL: https://issues.apache.org/jira/browse/FLINK-20989
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.11.3
>            Reporter: godfrey he
>            Assignee: godfrey he
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.11.4
>
>
> The following test case will encounter NPE:
> {code:scala}
>     val t = tEnv.fromValues(
>       DataTypes.ROW(
>         DataTypes.FIELD("a", DataTypes.INT()),
>         DataTypes.FIELD("b", DataTypes.ARRAY(DataTypes.STRING()))
>       ),
>       row(1, Array("aa", "bb", "cc")),
>       row(2, null),
>       row(3, Array("dd"))
>     )
>     tEnv.registerTable("T", t)
>     tEnv.executeSql("SELECT a, s FROM T, UNNEST(T.b) as A (s)").print()
> {code}
> Exception is 
> {code:java}
> Caused by: java.lang.NullPointerException
> 	at scala.collection.mutable.ArrayOps$ofRef$.length$extension(ArrayOps.scala:192)
> 	at scala.collection.mutable.ArrayOps$ofRef.length(ArrayOps.scala:192)
> 	at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:32)
> 	at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
> 	at org.apache.flink.table.planner.plan.utils.ObjectExplodeTableFunc.eval(ExplodeFunctionUtil.scala:34)
> {code}
> The reason is functions in ExplodeFunctionUtil do not handle null data



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