Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9819#issuecomment-157905961
**[Test build #46251 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/46251/consoleFull)**
for PR 9819 at commit
[`b66ef4d`](https://github.com/apache/spark/commit/b66ef4de6399fa5a7cfd62784d3654085b5d9026).
* This patch **fails Spark unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:\n *
`abstract class ImperativeAggregate extends AggregateFunction with
CodegenFallback `\n * `trait WindowFunction extends Expression `\n * `case
class Lead(input: Expression, offset: Expression, default: Expression)`\n *
`case class Lag(input: Expression, offset: Expression, default: Expression)`\n
* `abstract class AggregateWindowFunction extends DeclarativeAggregate with
WindowFunction `\n * `abstract class RowNumberLike extends
AggregateWindowFunction `\n * `trait SizeBasedWindowFunction extends
AggregateWindowFunction `\n * `case class RowNumber() extends RowNumberLike
`\n * `case class CumeDist(n: Expression)`\n * `case class NTile(buckets:
Expression, n: Expression)`\n * `abstract class RankLike extends
AggregateWindowFunction `\n * `case class Rank(order: Seq[Expression]) extends
RankLike `\n * `case class DenseRank(order: Seq[Expression]) extends RankLike
`\n * `case class PercentRank(order:
Seq[Expression], n: Expression) extends RankLike`\n
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