I get sick of my sequence, please somebody help me !

Hi,
I have made a form which you can use to insert a new employee.
I also have made a sequence for employee ID. It starts from 1 to
999999.
If I call my form for the first time to insert an employee the
value of my sequence is 1, of course.
But If I don't want to insert that employee right now. I close
my form. And next time I call my form again the value of my
sequence is 2 now !.
I don't have insert any employee at the mean time.
I want to increase the value of that sequence if I have add a
new employee.
Does anyone know to arrange that ?
Thanks in advance !
Chu

Hi
The drawback of using a sequence is that it doesn't care what
you are doing with the number provided. Once the sequence has
issued a new number, it forgets about it.
Why were sequences invented?
Without sequences, you have to provide your own table with a row
holding the last used number. To update, you have to lock the
table. The problem arises if you have a big number of users
doing the same task (like entering orders) - everybody is trying
to lock that single row asking for a new number - now the row is
becoming a 'hot spot', degrading the system performance to a
crawl.
Here sequences become handy: Since sequences don't have to lock
a single row, it's not degrading performance but still providing
a distinctive number. But you cannot give back a issued number.
Question: Does the emp-id really has to be an 'unbroken' line of
numbers? One point of chosing a number for a primary key is that
the number itself doesn't have a meaning in itself, so in
general, missing numbers are not a concern. In another situation
(like line-items in an order) however, missing numbers cannot be
tolerated.
In general, for an unbroken line of emp-ids, you have to build
it yourself. I know how to do it with Oracle Forms but not how
to do it with Portal Forms, I'm affraid. Maybe somebody else can
provide this....
Hope that helps
Tino

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Oracle OLAP 9.0.1.0.1                              Manual
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OracleOra9ias_homeClientCache                         Manual
OracleOra9ias_homeEMWebsite               Started          Started
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OracleportalProcessManager                         Manual
OracleportalWebCache                    Started          Automatic
OracleportalWebCacheAdmin               Started          Automatic
OracleportalWebCacheMon                              Manual
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[email protected]

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