Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/19567#discussion_r147560424 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala --- @@ -456,8 +456,17 @@ object JdbcUtils extends Logging { case StringType => (array: Object) => - array.asInstanceOf[Array[java.lang.String]] - .map(UTF8String.fromString) + array match { --- End diff -- looking at how we handle StringType, we call `ResultSet.getString` even if the underling type is not string, but uuid, inet, cidr, etc. I think we shoud follow the behavior here, i.e. just call `array.asInstanceOf[Array[java.lang.Object]].map(obj => UTF8String.fromString(obj.toString))`
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