Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/13333#discussion_r64810777
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -1795,7 +1795,9 @@ class Analyzer(
def apply(plan: LogicalPlan): LogicalPlan = plan transform {
case logical: LogicalPlan => logical transformExpressions {
case WindowExpression(wf: WindowFunction, spec) if
spec.orderSpec.isEmpty =>
- failAnalysis(s"WindowFunction $wf requires window to be ordered")
+ failAnalysis(s"WindowFunction $wf requires window to be ordered,
please add ORDER BY " +
--- End diff --
While you are at it, can you fix this and say "Window function" rather than
WindowFunction?
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