zhengruifeng commented on code in PR #36977:
URL: https://github.com/apache/spark/pull/36977#discussion_r911626136


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
##########
@@ -2139,16 +2139,16 @@ class Analyzer(override val catalogManager: 
CatalogManager)
     }
 
     def lookupBuiltinOrTempFunction(name: Seq[String]): Option[ExpressionInfo] 
= {
-      if (name.length == 1) {
-        v1SessionCatalog.lookupBuiltinOrTempFunction(name.head)
+      if (name.length == 1 || name.length == 3) {

Review Comment:
   let me try to handle system functions and user functions seperately, then 
the changes in `Analyzer` could be reverted.



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