Setting and retrieving session using pl/sql

Question

How to set and retrieve session using pl/sql?Can anyone help me?

Answer 1

mrs wrote:
create or replace
function get_login_details(in_user in VARCHAR2,in_pwd in VARCHAR2,in_cname in VARCHAR2)
..snipped..The code should look as follows:
create or replace function AuthenticateUser( userName varchar2, userPassw varchar2, userGroup varchar2 )
return integer is
  i integer;
begin
  --// purpose of the SQL is simply to check if such a row exist -
--// no data from the row needs to be fetched
  select 1 into i from acl_users_gv
  where user_name = userName
  and password = userPassw
  and entity_group_name = userGroup;
  --// if the SQL succeeded, then the row exists and matches
  --// the authentication details
  return( 0 );
exception when NO_DATA_FOUND then
  --// SQL failed to find a row - authentication details do
  --// not exist
  return( 1 );
end;No need to fetch data unnecessarily. No need too check the fetched data when the column values are already checked via the SQL filter condition (predicate).
No need to return a flag variable as a freely formatted text string containing Successful Login and login failed. That is not a robust design to use a string variable like that. Use boolean for true/false. Or use integer values 0/1.
This is my function get_login_details.And I need to get this 'o_mesg' in other java file also.Standard PL/SQL call from Java. The SQL string to execute contains an anonymous PL/SQL and needs to use bind variables. E.g.
begin
  :result := AuthenticateUse( :userName, :userPassw, :userGroup );
end;
Can you suggest the right way, how I can get this variable in other pages?That depends on whether there is database session state. If there is, authentication can be done once only via a trusted context, that specifies whether the session is authenticated.
If this is done from an app server that uses a db session pool and stateless db sessions, the state needs to be kept in the app server.
Do you understand what stateful versus stateless db sessions are, and what the differences are?