SQL> conn test/test
Connected.
SQL> create table guri(name varchar2(9));

Table created.

SQL> select table_name from user_tables;

no rows selected

SQL> conn /as sysdba
Connected.
SQL> select owner,object_name,object_type from dba_objects where object_name = 'GURI';

OWNER OBJECT_NAME OBJECT_TYPE
---------- ----------- ------------
CISREPLICA GURI TABLE

CREATE OR REPLACE TRIGGER "SYS"."DB_LOGON"
AFTER logon ON DATABASE  WHEN (USER = 'TEST') BEGIN
execute immediate 'ALTER SESSION SET CURRENT_SCHEMA = GURI'; 
END;
ALTER TRIGGER "SYS"."DB_LOGON" ENABLE