better error message

Author: lovasoa

tests/sqlparser_postgres.rs

@@ -2339,7 +2339,7 @@ fn parse_json_table_is_not_reserved() {
             name: ObjectName(name),
             ..
         } => assert_eq!("JSON_TABLE", name[0].value),
-        _ => unreachable!(),
+        _ => panic!("Expected JSON_TABLE to be parsed as a table name"),
     }
 }