srielau commented on code in PR #46138:
URL: https://github.com/apache/spark/pull/46138#discussion_r1575173778


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala:
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@@ -365,6 +367,8 @@ class AstBuilder extends DataTypeAstBuilder with 
SQLConfHelper with Logging {
     val cols = 
Option(ctx.identifierList()).map(visitIdentifierList).getOrElse(Nil)
     val partitionKeys = 
Option(ctx.partitionSpec).map(visitPartitionSpec).getOrElse(Map.empty)
 
+    blockBang(ctx.errorCapturingNot())

Review Comment:
   I don't see how that helps. We don't have context to tell us whether it's a 
legal or illegal usage of `!`.
   This is the best I could come up with.  



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