You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/03/22 08:27:25 UTC
[jira] [Assigned] (SPARK-14063) SQLContext.range should return
Dataset[java.lang.Long]
[ https://issues.apache.org/jira/browse/SPARK-14063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-14063:
------------------------------------
Assignee: Apache Spark (was: Reynold Xin)
> 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: Apache Spark
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org