Error with a Sequence, but not sure ...

Question

Hi,
i have a problem, i dont know the reason for this. I will try to explain it.
I have 2 HTML DB Pages, the first shows the values of the second in a report with a search function for the different columns. The second page you can edit the entries and add new ones. The second page consists of different fields (date, text and number...), one field is filled with a primary key which is a sequence. No Problem till yet.
When i want to add an entry and an error occurs(ex. text in a date field, the validation works and the message will be shown:" Incorrect format for a date"). Then i correct the mistake and want to add the entry after i had filled all required fields.
Then this message appears:
ORA-20001: Error in DML: p_rowid=1201, p_alt_rowid=EVENT_ID, p_rowid2=, p_alt_rowid2=. ORA-01403: no data found
     Error      ORA-20001: Error in DML: p_rowid=1201, p_alt_rowid=EVENT_ID, p_rowid2=, p_alt_rowid2=. ORA-01403: no data found
OK      
That happens only when a required field isnt filled at the moment of the submit, then i correct it, Submit it again and the message appears. When i fill all the fields without an error(validation message) it works.
I need a solution for this problem, i hope you can help me.
Thanks Marcus.

Answer 1

Sounds like your PK sequence is getting prematurely incremented when the page is submitted. When the validations fail, the (bad) PK is getting into your hidden PK item and so when you correct the values and Submit again, it is trying to update some other record than the one that the OnLoad Row Fetch process had loaded.
Just a guess, you would need to explain your problem in much more detail before we can assist you.
Specifically,
1. What are your OnLoad and After Submit processes on the Page 2 ( the editable page)?
2. How is the PK on your table being generated? Using a before-row trigger or within the HTML DB page itself?
3. If trigger generated PK, be sure to use the "Returning primary key into item" feature on the Automatic DML (after submit) process. This will ensure that the record you just created will be loaded when the page is refreshed.
Hope this helps.