Drop unreachable error path in CREATE USER MAPPING dispatch

Author: LucaCappelletti94

src/parser/mod.rs

@@ -5535,7 +5535,8 @@ impl<'a> Parser<'a> {
                     modifier_loc
                 );
             }
-            self.expect_keywords(&[Keyword::USER, Keyword::MAPPING])?;
+            self.advance_token(); // USER
+            self.advance_token(); // MAPPING
             self.parse_create_user_mapping().map(Into::into)
         } else if self.parse_keyword(Keyword::USER) {
             self.parse_create_user(or_replace).map(Into::into)

tests/sqlparser_postgres.rs

@@ -11840,6 +11840,10 @@ fn parse_create_user_mapping() {
             "CREATE USER MAPPING FOR app",
             "Expected: SERVER, found: EOF",
         ),
+        (
+            "CREATE USER MAPPING FOR",
+            "Expected: identifier, found: EOF",
+        ),
         (
             "CREATE USER MAPPING FOR app SERVER",
             "Expected: identifier, found: EOF",