Reynold Xin 297c20226d [SPARK-14063][SQL] SQLContext.range should return Dataset[java.lang.Long] ... ## What changes were proposed in this pull request? This patch changed the return type for SQLContext.range from `Dataset[Long]` (Scala primitive) to `Dataset[java.lang.Long]` (Java boxed long). Previously, SPARK-13894 changed the return type of range from `Dataset[Row]` to `Dataset[Long]`. The problem is that due to https://issues.scala-lang.org/browse/SI-4388, Scala compiles primitive types in generics into just Object, i.e. range at bytecode level now just returns `Dataset[Object]`. This is really bad for Java users because they are losing type safety and also need to add a type cast every time they use range. Talked to Jason Zaugg from Lightbend (Typesafe) who suggested the best approach is to return `Dataset[java.lang.Long]`. The downside is that when Scala users want to explicitly type a closure used on the dataset returned by range, they would need to use `java.lang.Long` instead of the Scala `Long`. ## How was this patch tested? The signature change should be covered by existing unit tests and API tests. I also added a new test case in DatasetSuite for range. Author: Reynold Xin <rxin@databricks.com> Closes #11880 from rxin/SPARK-14063.		2016-03-22 11:37:37 -07:00
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src	[SPARK-14063][SQL] SQLContext.range should return Dataset[java.lang.Long]	2016-03-22 11:37:37 -07:00
pom.xml	[SPARK-13780][SQL] Add missing dependency to build.	2016-03-11 10:27:38 -08:00