Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/2919#discussion_r19707996
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/api/java/JavaSQLContext.scala ---
@@ -86,9 +87,13 @@ class JavaSQLContext(val sqlContext: SQLContext) extends
UDFRegistration {
/**
* Applies a schema to an RDD of Java Beans.
+ *
+ * WARNING: The ordering of elements in the schema may differ from Scala.
--- End diff --
Thanks for discovering/adding this. Instead of saying that it differs from
Scala, just say that since there is no guaranteed ordering for fields in a Java
Bean `SELECT *` queries will return the columns in an undefined order.
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