How to detect loged in user

Hi All,
I have a scenario like this,
i have a global report in which some branch codes are available.
once the end user logged into the system,i want to restrict the report details according to his branch code.
ex: report details (name,age,address,salary,branch)
one user login --> branch code is (COL)
he/she should not be able to view the report details which are related to other branches.
is there any way to do this using Apex...??? or do i need to handle this through the query...???
if i need to handle this through a query then i have to detect the login session clearly like login user name.
Then i can use the name and get the branch code from the login table and pass to the query..i guess im correct ;)
is this possible to detect the user login name and bring it to a sql query ????
ex: login name say MAX branch COL
select * from TABLE_SAMPLE where branch_code=(select branch_code from USER where uname='MAX'; );
can anybody give me a hand on this regard.plss..???
Thanks,
Max
Edited by: Max on Dec 6, 2010 4:46 AM

he/she should not be able to view the report details which are related to other branches.This is known as Fine Grained Access Control (FGAC).
is there any way to do this using Apex...??? or do i need to handle this through the query...???Both. The best approach is to use Virtual Private Database (VPD), utilizing APEX's built-in VPD security attribute to set the context.
VPD requires an Enterprise Edition database. In other editions a similar approach can be developed using parameterized views, again setting the context through the APEX VPD security attribute.
>
if i need to handle this through a query then i have to detect the login session clearly like login user name.
Then i can use the name and get the branch code from the login table and pass to the query..i guess im correct
is this possible to detect the user login name and bring it to a sql query ????
ex: login name say MAX branch COL
select * from TABLE_SAMPLE where branch_code=(select branch_code from USER where uname='MAX'; );
>
Use the <tt>APP_USER</tt> built-in substitution string to get the ID of the authenticated user:
select * from TABLE_SAMPLE where branch_code=(select branch_code from USER where uname= :app_user);

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