fix mistake

Author: ulysses-you

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala

@@ -3652,7 +3652,7 @@ class AstBuilder(conf: SQLConf) extends SqlBaseBaseVisitor[AnyRef] with Logging
 
   override def visitRefreshFunction(ctx: RefreshFunctionContext): LogicalPlan = withOrigin(ctx) {
     val functionIdentifier = visitMultipartIdentifier(ctx.multipartIdentifier)
-    RefreshFunction(UnresolvedNamespace(functionIdentifier))
+    RefreshFunction(functionIdentifier)
   }
 
   override def visitCommentNamespace(ctx: CommentNamespaceContext): LogicalPlan = withOrigin(ctx) {

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/v2Commands.scala

@@ -520,4 +520,4 @@ case class CommentOnTable(child: LogicalPlan, comment: String) extends Command {
 /**
  * The logical plan of the REFRESH FUNCTION command that works for v2 catalogs.
  */
-case class RefreshFunction(func: LogicalPlan) extends Command
+case class RefreshFunction(func: Seq[String]) extends Command

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/DDLParserSuite.scala

@@ -2114,12 +2114,9 @@ class DDLParserSuite extends AnalysisTest {
   }
 
   test("REFRESH FUNCTION") {
-    parseCompare("REFRESH FUNCTION c",
-      RefreshFunction(UnresolvedNamespace(Seq("c"))))
-    parseCompare("REFRESH FUNCTION b.c",
-      RefreshFunction(UnresolvedNamespace(Seq("b", "c"))))
-    parseCompare("REFRESH FUNCTION a.b.c",
-      RefreshFunction(UnresolvedNamespace(Seq("a", "b", "c"))))
+    parseCompare("REFRESH FUNCTION c", RefreshFunction(Seq("c")))
+    parseCompare("REFRESH FUNCTION b.c", RefreshFunction(Seq("b", "c")))
+    parseCompare("REFRESH FUNCTION a.b.c", RefreshFunction(Seq("a", "b", "c")))
   }
 
   private case class TableSpec(

sql/core/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveSessionCatalog.scala

@@ -612,9 +612,9 @@ class ResolveSessionCatalog(
           replace)
       }
 
-    case RefreshFunction(ResolvedNamespace(_, ns)) =>
+    case RefreshFunction(func) =>
       val FunctionIdentifier(function, database) =
-        parseSessionCatalogFunctionIdentifier(ns, "REFRESH FUNCTION")
+        parseSessionCatalogFunctionIdentifier(func, "REFRESH FUNCTION")
       // Fallback to v1 command
       RefreshFunctionCommand(database, function)
   }