Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9003#issuecomment-149790428
**[Test build #44046 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44046/consoleFull)**
for PR 9003 at commit
[`62c515c`](https://github.com/apache/spark/commit/62c515cad1e2fb712256601f139d098fa4fb3749).
* 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 * `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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