Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/18074#discussion_r119072616
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/window/WindowExec.scala
---
@@ -153,12 +153,13 @@ case class WindowExec(
}
/**
- * Collection containing an entry for each window frame to process. Each
entry contains a frames'
- * WindowExpressions and factory function for the WindowFrameFunction.
+ * Collection containing an entry for each window frame to process. Each
entry contains a frame's
+ * [[WindowExpression]]s and factory function for the
WindowFrameFunction.
*/
private[this] lazy val windowFrameExpressionFactoryPairs = {
type FrameKey = (String, FrameType, Option[Int], Option[Int])
type ExpressionBuffer = mutable.Buffer[Expression]
+ type WindowExpressionBuffer = mutable.Buffer[WindowExpression]
--- End diff --
@jaceklaskowski this is still not reverted. Please, back out any non-doc
changes. I can't spend 4 rounds of review on things like this, it's not fair to
anyone else waiting
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