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This PR removes Hive windows functions from Spark and replaces them with (native) Spark ones. The PR is on par with Hive in terms of features. This has the following advantages: * Better memory management. * The ability to use spark UDAFs in Window functions. cc rxin / yhuai Author: Herman van Hovell <hvanhovell@questtec.nl> Closes #9819 from hvanhovell/SPARK-8641-2. |
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