koert kuipers created SPARK-15780:
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Summary: Support mapValues on KeyValueGroupedDataset
Key: SPARK-15780
URL: https://issues.apache.org/jira/browse/SPARK-15780
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: koert kuipers
Priority: Minor
Currently when doing groupByKey on a Dataset the key ends up in the values
which can be clumsy:
{noformat}
val ds: Dataset[(K, V)] = ...
val grouped: KeyValueGroupedDataset[(K, (K, V))] = ds.groupByKey(_._1)
{noformat}
With mapValues one can create something more similar to PairRDDFunctions[K, V]:
{noformat}
val ds: Dataset[(K, V)] = ...
val grouped: KeyValueGroupedDataset[(K, V)] =
ds.groupByKey(_._1).mapValues(_._2)
{noformat}
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