dongjoon-hyun commented on a change in pull request #35760:
URL: https://github.com/apache/spark/pull/35760#discussion_r821389146
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
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@@ -1380,6 +1380,31 @@ class Analyzer(override val catalogManager:
CatalogManager)
throw
QueryCompilationErrors.invalidStarUsageError("explode/json_tuple/UDTF",
extractStar(g.generator.children))
+ case u @ Union(children, _, _)
+ // if there are duplicate output columns, give them unique expr ids
+ if children.exists(c => c.output.map(_.exprId).distinct.length <
c.output.length) =>
Review comment:
nit. two more spaces since this is a continuation of the above `case`
statement?
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