[jira] [Created] (SPARK-33134) Incorrect nested complex JSON fields raise an exception

[Maxim Gekk (Jira)]

Maxim Gekk created SPARK-33134:
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             Summary: Incorrect nested complex JSON fields raise an exception
                 Key: SPARK-33134
                 URL: https://issues.apache.org/jira/browse/SPARK-33134
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.2, 3.1.0
            Reporter: Maxim Gekk


The code below:
{code:scala}
val pokerhand_raw = Seq("""[{"cards": [11], "playerId": 
583651}]""").toDF("events")
    val event = new StructType()
      .add("playerId", LongType)
      .add("cards", ArrayType(
        new StructType()
          .add("id", LongType)
          .add("rank", StringType)))
    val pokerhand_events = pokerhand_raw
      .select(explode(from_json($"events", ArrayType(event))).as("event"))
    pokerhand_events.show
{code}
throw the exception in the PERMISSIVE mode (default):
{code:java}
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to 
org.apache.spark.sql.catalyst.util.ArrayData
  at 
org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow.getArray(rows.scala:48)
  at 
org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow.getArray$(rows.scala:48)
  at 
org.apache.spark.sql.catalyst.expressions.GenericInternalRow.getArray(rows.scala:195)
  at 
org.apache.spark.sql.catalyst.expressions.JsonToStructs.$anonfun$converter$2(jsonExpressions.scala:560)
  at 
org.apache.spark.sql.catalyst.expressions.JsonToStructs.nullSafeEval(jsonExpressions.scala:597)
  at 
org.apache.spark.sql.catalyst.expressions.UnaryExpression.eval(Expression.scala:461)
  at 
org.apache.spark.sql.catalyst.expressions.ExplodeBase.eval(generators.scala:313)
  at 
org.apache.spark.sql.execution.GenerateExec.$anonfun$doExecute$8(GenerateExec.scala:108)
{code}
The same works in Spark 2.4:
{code:scala}
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 2.4.6
      /_/

Using Scala version 2.11.12 (OpenJDK 64-Bit Server VM, Java 1.8.0_265)
...
scala> pokerhand_events.show()
+-----+
|event|
+-----+
+-----+
{code}



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