Sun Rui created SPARK-11395:
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Summary: Support over and window specification in SparkR
Key: SPARK-11395
URL: https://issues.apache.org/jira/browse/SPARK-11395
Project: Spark
Issue Type: New Feature
Components: SparkR
Affects Versions: 1.5.1
Reporter: Sun Rui
1. implement over() in Column class.
2. support window spec
(http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.expressions.WindowSpec)
3. support utility functions for defining window in DataFrames.
(http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.expressions.Window)
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