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[SQL] Improve SparkSQL Aggregates
* Add native min/max (was using hive before). * Handle nulls correctly in Avg and Sum. Author: Michael Armbrust <michael@databricks.com> Closes #683 from marmbrus/aggFixes and squashes the following commits: 64fe30b [Michael Armbrust] Improve SparkSQL Aggregates * Add native min/max (was using hive before). * Handle nulls correctly in Avg and Sum. (cherry picked from commit 19c8fb02) Signed-off-by:Reynold Xin <rxin@apache.org>
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala 4 additions, 0 deletions.../main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala 75 additions, 10 deletions...rg/apache/spark/sql/catalyst/expressions/aggregates.scala
- sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala 7 additions, 0 deletions...e/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
- sql/core/src/test/scala/org/apache/spark/sql/TestData.scala 10 additions, 0 deletionssql/core/src/test/scala/org/apache/spark/sql/TestData.scala
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