Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/1935#issuecomment-52441094
[QA tests have
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/18718/consoleFull)
for PR 1935 at commit
[`9153652`](https://github.com/apache/spark/commit/915365256212dae5e4ae43b1ec24238dbb85914e).
* This patch **fails** unit tests.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `case class CountDistinct(expressions: Seq[Expression]) extends
PartialAggregate `
* `case class CollectHashSet(expressions: Seq[Expression]) extends
AggregateExpression `
* `case class CollectHashSetFunction(`
* `case class CombineSetsAndCount(inputSet: Expression) extends
AggregateExpression `
* `case class CombineSetsAndCountFunction(`
* `case class CountDistinctFunction(`
* `case class MaxOf(left: Expression, right: Expression) extends
Expression `
* `case class NewSet(elementType: DataType) extends LeafExpression `
* `case class AddItemToSet(item: Expression, set: Expression) extends
Expression `
* `case class CombineSets(left: Expression, right: Expression) extends
BinaryExpression `
* `case class CountSet(child: Expression) extends UnaryExpression `
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