maropu commented on a change in pull request #29087:
URL: https://github.com/apache/spark/pull/29087#discussion_r551765532
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -692,13 +712,41 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef] with
SQLConfHelper with Logg
havingClause: HavingClauseContext,
windowClause: WindowClauseContext,
relation: LogicalPlan): LogicalPlan = withOrigin(ctx) {
+ val isDistinct = selectClause.setQuantifier() != null &&
+ selectClause.setQuantifier().DISTINCT() != null
+
+ // Visit common project
Review comment:
nit: the comment `Visit common project` looks a bit ambiguous...
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