OceanBase 数据库 Oracle 模式下 PL 模块中不支持包含标识符 NEW

  ```shell
  obclient > create or replace package dbms_context is 
             obj 
             sys_dbms_context := new sys_dbms_context(''); 
             precedure sp_test; 
             end dbms_context;
             /
  ORA-00900: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'new sys_dbms_context('')' at line 1
  ```

  ```shell
  obj sys_dbms_context := NEW sys_dbms_context('');
  ```

obclient > create or replace package dbms_context is 
           obj 
           sys_dbms_context := sys_dbms_context(''); 
           precedure sp_test; 
           end dbms_context;
           /
Query OK, 0 rows affected, 1 warning (0.066 sec)