Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9003#issuecomment-150729081
**[Test build #44267 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44267/consoleFull)**
for PR 9003 at commit
[`cf8a14b`](https://github.com/apache/spark/commit/cf8a14bb24924079af2c30234a083a1e6c6d4c23).
* This patch **fails Spark unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:\n *
`abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate
with Serializable `\n * `case class Variance(child: Expression,`\n * `case
class VarianceSamp(child: Expression,`\n * `case class VariancePop(child:
Expression,`\n * `case class Skewness(child: Expression,`\n * `case class
Kurtosis(child: Expression,`\n * `case class Kurtosis(child: Expression)
extends UnaryExpression with AggregateExpression `\n * `case class
Skewness(child: Expression) extends UnaryExpression with AggregateExpression
`\n * `case class Variance(child: Expression) extends UnaryExpression with
AggregateExpression `\n * `case class VariancePop(child: Expression) extends
UnaryExpression with AggregateExpression `\n * `case class VarianceSamp(child:
Expression) extends UnaryExpression with AggregateExpression `\n
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