maropu commented on a change in pull request #29107:
URL: https://github.com/apache/spark/pull/29107#discussion_r456741460
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
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@@ -337,6 +337,10 @@ trait CheckAnalysis extends PredicateHelper {
case Tail(limitExpr, _) => checkLimitLikeClause("tail", limitExpr)
+ case Union(_, byName, allowMissingCol) if byName || allowMissingCol
=>
+ failAnalysis("Union should not be with true `byName` or " +
+ "`allowMissingCol` flags after analysis phase.")
Review comment:
Just a question; users can see this error message? That's the case of an
analyzer bug?
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