Alter session when login

Question

Hi,
on 11G R2,
I want that user3 change session to user2 just on connection. How is it possible ?
I want to avoid user3 to issue :
ALTER SESSION SET CURRENT_SCHEMA =USER2at each connection.
Thanks for help.

Answer 1

it working , see this
SQL> conn hr
Enter password:
Connected.
SQL> select PRIVILEGE from session_privs ;
PRIVILEGE
CREATE SESSION
ALTER SESSION
UNLIMITED TABLESPACE
CREATE TABLE
CREATE CLUSTER
CREATE SYNONYM
CREATE VIEW
CREATE SEQUENCE
CREATE DATABASE LINK
CREATE PROCEDURE
CREATE TRIGGER
CREATE TYPE
CREATE OPERATOR
CREATE INDEXTYPE
ADMINISTER DATABASE TRIGGER
15 rows selected.
SQL> conn scott
Enter password:
Connected.
SQL> select PRIVILEGE from session_privs ;
PRIVILEGE
CREATE SESSION
UNLIMITED TABLESPACE
CREATE TABLE
CREATE CLUSTER
CREATE SEQUENCE
CREATE PROCEDURE
CREATE TRIGGER
CREATE TYPE
CREATE OPERATOR
CREATE INDEXTYPE
ADMINISTER DATABASE TRIGGER
11 rows selected.
SQL> conn hr
Enter password:
Connected.
SQL> CREATE OR REPLACE TRIGGER set_after_logon  AFTER LOGON ON DATABASE
     BEGIN
     execute immediate 'ALTER SESSION SET CURRENT_SCHEMA = SCOTT';
     END;
    /   2    3    4    5
Trigger created.
SQL> conn scott
Enter password:
Connected.
SQL> CREATE OR REPLACE TRIGGER set_after_logon  AFTER LOGON ON DATABASE
     BEGIN
     execute immediate 'ALTER SESSION SET CURRENT_SCHEMA = HR';
     END;
    /   2    3    4    5
Trigger created.
SQL> conn scott
Enter password:
Connected.
SQL> set serverout on
SQL> exec  dbms_output.put_line(SYS_CONTEXT('USERENV','CURRENT_SCHEMA'));
HR
PL/SQL procedure successfully completed.
SQL> conn hr
Enter password:
Connected.
SQL> set serverout on
SQL> exec  dbms_output.put_line(SYS_CONTEXT('USERENV','CURRENT_SCHEMA'));
HR
PL/SQL procedure successfully completed.
SQL>  select owner,trigger_name from dba_triggers where trigger_name like '%AFTER_LOGON%';
OWNER                          TRIGGER_NAME
SCOTT                          SET_AFTER_LOGON
HR                             SET_AFTER_LOGON
OWNER                          NAME                           TYPE               LINE TEXT
SCOTT                          SET_AFTER_LOGON                TRIGGER               1 TRIGGER set_after_logon  AFTER LOGON ON DATABASE
SCOTT                          SET_AFTER_LOGON                TRIGGER               2      BEGIN
SCOTT                          SET_AFTER_LOGON                TRIGGER               3      execute immediate 'ALTER SESSION SET CURRENT_SCHEMA = HR';
SCOTT                          SET_AFTER_LOGON                TRIGGER               4      END;
HR                             SET_AFTER_LOGON                TRIGGER               1 TRIGGER set_after_logon  AFTER LOGON ON DATABASE
HR                             SET_AFTER_LOGON                TRIGGER               2      BEGIN
HR                             SET_AFTER_LOGON                TRIGGER               3      execute immediate 'ALTER SESSION SET CURRENT_SCHEMA = SCOTT';
HR                             SET_AFTER_LOGON                TRIGGER               4      END;
8 rows selected.but.....
SQL> conn SYSTEM
Enter password:
Connected.
SQL> set serverout on
exec dbms_output.put_line(SYS_CONTEXT('USERENV','CURRENT_SCHEMA'));SQL>
HR
PL/SQL procedure successfully completed.
since it set at db level so it get fired for all user who login at db until you specify the condition in trigger for specific user