Xiao Li created SPARK-11914:
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Summary: [SQL] Support coalesce and repartition in Dataset APIs
Key: SPARK-11914
URL: https://issues.apache.org/jira/browse/SPARK-11914
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 1.6.0
Reporter: Xiao Li
repartition: Returns a new [[Dataset]] that has exactly `numPartitions`
partitions.
coalesce: Returns a new [[Dataset]] that has exactly `numPartitions`
partitions. Similar to coalesce defined on an [[RDD]], this operation results
in a narrow dependency, e.g. if you go from 1000 partitions to 100 partitions,
there will not be a shuffle, instead each of the 100 new partitions will claim
10 of the current partitions.
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