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https://issues.apache.org/jira/browse/SPARK-14063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-14063.
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Resolution: Fixed
> SQLContext.range should return Dataset[java.lang.Long]
> ------------------------------------------------------
>
> Key: SPARK-14063
> URL: https://issues.apache.org/jira/browse/SPARK-14063
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.0.0
>
>
> 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 [~retronym] who suggested the best approach is to return
> Dataset[java.lang.Long]. The small 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.
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