Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/6297#issuecomment-135655316
[Test build #41730 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/41730/console)
for PR 6297 at commit
[`25425ac`](https://github.com/apache/spark/commit/25425ac742e231bd45b62ee31bf217a94e568e55).
* This patch **fails Scala style tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `case class Stddev(child: Expression) extends StddevAgg(child) `
* `case class StddevPop(child: Expression) extends StddevAgg(child) `
* `case class StddevSamp(child: Expression) extends StddevAgg(child) `
* `abstract class StddevAgg(child: Expression) extends AlgebraicAggregate
`
* `abstract class StddevAgg1(child: Expression) extends UnaryExpression
with PartialAggregate1 `
* `case class Stddev(child: Expression) extends StddevAgg1(child) `
* `case class StddevPop(child: Expression) extends StddevAgg1(child) `
* `case class StddevSamp(child: Expression) extends StddevAgg1(child) `
* `case class ComputePartialStd(child: Expression) extends
UnaryExpression with AggregateExpression1 `
* `case class ComputePartialStdFunction (`
* `case class MergePartialStd(child: Expression, isSample: Boolean)
extends UnaryExpression with AggregateExpression1 `
* `case class MergePartialStdFunction(`
* `case class StddevFunction(`
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