text: -- @testpoint: create_wlm_session_info(int flag),将当前内存中记录的TopSQL算子级别相关统计信息清理,当入参为无效值（为空、特殊字符、多参）时，合理报错
  
  ----step1：入参为空; expect:合理报错
  select create_wlm_session_info();
  
  ----step2：入参为特殊字符; expect:合理报错
  select create_wlm_session_info('@#$');
  
  ----step3：多参; expect:合理报错
  select create_wlm_session_info(1,2);
  