Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/12708#discussion_r61790515
--- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala ---
@@ -335,6 +358,19 @@ trait Row extends Serializable {
def getAs[T](fieldName: String): T = getAs[T](fieldIndex(fieldName))
/**
+ * Returns the value of a given fieldName as a scala.util.Try object.
+ */
+ def attempt[T](fieldName: String): Try[T] =
Try(getAs[T](fieldIndex(fieldName)))
--- End diff --
Those kind of problems will never manifest in an external Row with the
wrong datatypes. The execution engine will never produce values that are of a
different type than the schema.
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