Github user chenghao-intel commented on a diff in the pull request: https://github.com/apache/spark/pull/1612#discussion_r16642061 --- Diff: core/src/main/scala/org/apache/spark/rdd/JdbcRDD.scala --- @@ -57,6 +61,8 @@ class JdbcRDD[T: ClassTag]( mapRow: (ResultSet) => T = JdbcRDD.resultSetToObjectArray _) extends RDD[T](sc, Nil) with Logging { + private var schema: Seq[(String, Int, Boolean)] = null --- End diff -- Move the schema stuff to `JdbcResultSetRDD`? We'd better keep the Spark core clean and same implementation pattern with the other Core RDDs.
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