gengliangwang commented on code in PR #36077:
URL: https://github.com/apache/spark/pull/36077#discussion_r846210112


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ResolveDefaultColumnsUtil.scala:
##########
@@ -60,6 +61,9 @@ object ResolveDefaultColumns {
   val DEFAULTS_IN_EXPRESSIONS_ERROR = "Failed to execute INSERT INTO command 
because the " +
     "VALUES list contains a DEFAULT column reference as part of another 
expression; this is " +
     "not allowed"
+  // This is a TreeNodeTag indicating that the ResolveUserSpecifiedColumns 
rule has applied on a
+  // particular InsertIntoStatement of interest.
+  val USER_SPECIFIED_COLUMNS_RESOLVED = 
TreeNodeTag[Boolean]("UserSpecifiedColumnsResolved")

Review Comment:
   let's remove this



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