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https://issues.apache.org/jira/browse/SPARK-33134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hyukjin Kwon reassigned SPARK-33134:
------------------------------------
Assignee: Maxim Gekk
> 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
> Assignee: Maxim Gekk
> Priority: Major
>
> The code below:
> {code:scala}
> val pokerhand_raw = Seq("""[{"cards": [19], "playerId":
> 123456}]""").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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