Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/16925#discussion_r101123120
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -380,7 +380,10 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef]
with Logging {
}
// Window
- withDistinct.optionalMap(windows)(withWindows)
+ val withWindow = withDistinct.optionalMap(windows)(withWindows)
+
+ // Hint
+ withWindow.optionalMap(ctx.hint)(withHints)
--- End diff --
nit: we already `import ctx._` at the beginning, to be consistent we can
just write `hint`
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