alter session set container=DB;
select username, account_status from dba_users;ALTER SESSION SET "_optimizer_push_pred_cost_based" = FALSE;
ALTER SESSION SET "_optimizer_squ_bottomup" = FALSE;
ALTER SESSION SET "_optimizer_cost_based_transformation" = 'OFF';
>create user test identified by test default tablespace users;
User TEST created.
>create user "tEst" identified by test default tablespace users;
User "tEst" created.
>create user "TeST" identified by test default tablespace users;
User "TeST" created.
Скорее всего в расписании было выключение БД, которое потом потерялось и осталось только копирование батником.