Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/17417#discussion_r108056334
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/expressions/Window.scala ---
@@ -162,11 +162,11 @@ object Window {
* Creates a [[WindowSpec]] with the frame boundaries defined,
* from `start` (inclusive) to `end` (inclusive).
*
- * Both `start` and `end` are relative from the current row. For
example, "0" means "current row",
+ * Both `start` and `end` are relative to the current row. For example,
"0" means "current row",
* while "-1" means one off before the current row, and "5" means the
five off after the
* current row.
*
- * We recommend users use `Window.unboundedPreceding`,
`Window.unboundedFollowing`,
+ * We recommend that users use `Window.unboundedPreceding`,
`Window.unboundedFollowing`,
--- End diff --
Either way is correct, it wasn't wrong
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