Needs pop up message to occur on screen when data ia manipulated...

Question

Hi
In my application(forms 6i/oracle9i), I want pop up message to occur on the screen of application user A when another application user B manipulates the data. Message would be like '2 rows are updated in Branch Master'. Then there should be availabilty( currently from his screen itself) to user A to see those manipulations being done by user B.
Pop up message should occur in following cases
case 1: Just after User A log in to the Application i.e. all master data changes being done after he has logged out the application.
Case 2: During his session i.e. when he is using application, and in case there are changes to the Master Tables being done by other user.(this time pop up should come on the screen on which user is working.)
I am keeping the log of data changes in Audit_Trail_Log table through trigger.
Secondly, application keeps the login time of users in app_login_status. And logout time in app_login_logout_log table.
I hope you get my requirements. Thanks in advance.

Answer 1

can you try the following things:
Case 1
-- Count the number of inserts after the logout time of user
select count(*) from audit_trail_log where
statement_column like '%INSERT%'
and user<>user
and time_column>=(select max(logouttime) from app_login_logout_log where user=user);
-- Count the number of deletions after the logout time of user
select count(*) from audit_trail_log where
statement_column like '%DELETE%'
and user<>user
and time_column>=(select max(logouttime) from app_login_logout_log where user=user);
-- Count the number of updates after the logout time of user
select count(*) from audit_trail_log where
statement_column like '%UPDATE%'
and user<>user
and time_column>=(select max(logouttime) from app_login_logout_log where user=user);
ADD ALL THREE OF THEM. Put it in a variable. Say sum_updates
On when new form instance, write
message('Number of updates since last login : '||sum_updates);
synchronize;
Case 2
create a timer and in when timer expired trigger write the same code as in when new form instance. Put the sum in sum_updates2
find the difference diff_updates := sum_updates2-sum_updates
and in WHEN-TIMER-EXPIRED write:
if diff_updates<>0 then
message('Number of updates in the database in this session : '||diff_updates);
synchronize;
end if;
I guess, you understand the logic.
P.S : Not tested !!