beliefer commented on a change in pull request #30387:
URL: https://github.com/apache/spark/pull/30387#discussion_r547623075
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/window/WindowFunctionFrame.scala
##########
@@ -147,31 +148,133 @@ class FrameLessOffsetWindowFunctionFrame(
expressions: Array[OffsetWindowFunction],
inputSchema: Seq[Attribute],
newMutableProjection: (Seq[Expression], Seq[Attribute]) =>
MutableProjection,
- offset: Int)
+ offset: Int,
+ ignoreNulls: Boolean = false)
extends OffsetWindowFunctionFrameBase(
target, ordinal, expressions, inputSchema, newMutableProjection, offset) {
+ /** The input expression of Lead/Lag. */
+ private lazy val inputExpression = expressions.toSeq.map(_.input).head
+
+ /** The index of input expression in the row. */
+ private lazy val idx = inputAttrs.zipWithIndex.find(_._1 ==
inputExpression).map(_._2).head
+
+ /** Holder the UnsafeRow where the input operator by function is not null. */
+ private var nextSelectedRow = EmptyRow
+
+ /**
+ * The number of UnsafeRows skipped to get the next UnsafeRow where
Review comment:
OK
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