Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/23262#discussion_r240026388 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala --- @@ -33,7 +33,7 @@ object RDDConversions { data.mapPartitions { iterator => val numColumns = outputTypes.length val mutableRow = new GenericInternalRow(numColumns) - val converters = outputTypes.map(CatalystTypeConverters.createToCatalystConverter) + val converters = outputTypes.map(CatalystTypeConverters.createToCatalystConverter).toArray --- End diff -- shall we use `ExpressionEncoder` here?
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