Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9003#issuecomment-150105932
**[Test build #44119 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44119/consoleFull)**
for PR 9003 at commit
[`1594aba`](https://github.com/apache/spark/commit/1594abafec18dd0ba1c67c7a68c8ff017f88660a).
* This patch **fails Spark unit tests**.
* This patch **does not merge cleanly**.
* This patch adds the following public classes _(experimental)_:\n *
`abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate
with Serializable `\n * `abstract class SecondMoment(child: Expression)
extends CentralMomentAgg(child) `\n * `case class Variance(child: Expression,
mutableAggBufferOffset: Int = 0,`\n * `case class VarianceSamp(child:
Expression, mutableAggBufferOffset: Int = 0,`\n * `case class
VariancePop(child: Expression, mutableAggBufferOffset: Int = 0,`\n * `case
class Skewness(child: Expression, mutableAggBufferOffset: Int = 0,`\n * `case
class Kurtosis(child: Expression, mutableAggBufferOffset: Int = 0,`\n *
`abstract class CentralMomentAgg1(child: Expression)`\n * `case class
Kurtosis(child: Expression) extends CentralMomentAgg1(child) `\n * `case class
Skewness(child: Expression) extends CentralMomentAgg1(child) `\n * `case class
Variance(child: Expression) extends CentralMomentAgg1(child) `\n * `case class
VariancePop(child:
Expression) extends CentralMomentAgg1(child) `\n * `case class
VarianceSamp(child: Expression) extends CentralMomentAgg1(child) `\n
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