[SPARK-18855] Add RDD flatten function

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Abandoned
• Component/s: Spark Core
• Labels: flatten rdd
• Assignee: Unassigned
• Reporter: Linbo
• Created: 14/Dec/16 05:51
• Updated: 08/Oct/17 10:26
• Resolved: 16/Dec/16 01:46

Description

A new RDD flatten function is similar to flatten function of scala collections:

spark-shell

scala> val rdd = sc.makeRDD(List(List(1, 2, 3), List(4, 5), List(6)))
rdd: org.apache.spark.rdd.RDD[List[Int]] = ParallelCollectionRDD[0] at makeRDD at <console>:24

scala> rdd.flatten.collect
res0: Array[Int] = Array(1, 2, 3, 4, 5, 6)

Issue Links

• links to: [Github] Pull Request #16276 (linbojin)
• links to: [Github] Pull Request #19454 (sohum2002)