Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9819#issuecomment-164580690
**[Test build #47676 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/47676/consoleFull)**
for PR 9819 at commit
[`b4d9ca9`](https://github.com/apache/spark/commit/b4d9ca94757f3c83a00defdb74a4b63968d368ab).
* This patch **fails SparkR unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:\n *
`abstract class ImperativeAggregate extends AggregateFunction with
CodegenFallback `\n * `case class UnresolvedWindowExpression(`\n * `case
class WindowExpression(`\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() extends
RowNumberLike with SizeBasedWindowFunction `\n * `case class NTile(buckets:
Expression) extends RowNumberLike with SizeBasedWindowFunction `\n * `abstract
class RankLike extends AggregateWindowFunction `\n * `case class
Rank(children: Seq[Expression]) extends Rank
Like `\n * `case class DenseRank(children: Seq[Expression]) extends RankLike
`\n * `case class PercentRank(children: Seq[Expression]) extends RankLike with
SizeBasedWindowFunction `\n
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