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[SPARK-11451][SQL] Support single distinct count on multiple columns.
This PR adds support for multiple column in a single count distinct aggregate to the new aggregation path. cc yhuai Author: Herman van Hovell <hvanhovell@questtec.nl> Closes #9409 from hvanhovell/SPARK-11451.
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala 25 additions, 19 deletions...ache/spark/sql/catalyst/expressions/aggregate/Utils.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala 29 additions, 1 deletion...ark/sql/catalyst/expressions/conditionalExpressions.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala 3 additions, 0 deletions...che/spark/sql/catalyst/plans/logical/basicOperators.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ConditionalExpressionSuite.scala 14 additions, 0 deletions...sql/catalyst/expressions/ConditionalExpressionSuite.scala
- sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala 25 additions, 0 deletions.../scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
- sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala 31 additions, 6 deletions...ache/spark/sql/hive/execution/AggregationQuerySuite.scala
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