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[SPARK-11313][SQL] implement cogroup on DataSets (support 2 datasets)
A simpler version of https://github.com/apache/spark/pull/9279, only support 2 datasets. Author: Wenchen Fan <wenchen@databricks.com> Closes #9324 from cloud-fan/cogroup2.
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- sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java 1 addition, 0 deletions.../org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala 39 additions, 0 deletions...che/spark/sql/catalyst/plans/logical/basicOperators.scala
- sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala 20 additions, 0 deletions.../src/main/scala/org/apache/spark/sql/GroupedDataset.scala
- sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala 89 additions, 0 deletions...la/org/apache/spark/sql/execution/CoGroupedIterator.scala
- sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala 4 additions, 0 deletions...cala/org/apache/spark/sql/execution/SparkStrategies.scala
- sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala 41 additions, 0 deletions...scala/org/apache/spark/sql/execution/basicOperators.scala
- sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala 12 additions, 0 deletions...re/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
- sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala 51 additions, 0 deletions...g/apache/spark/sql/execution/CoGroupedIteratorSuite.scala
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