Database DATE field

I have a process on a page that loads a form's field data into a %rowtype variable and passes it to a package in the database.
The package then performs an update to the table holding the data.
There is a DATE field that I can not validate on the APEX front-end.
So, if the user enters something in the date field that is invalid,
it gets passed to the package on the back-end that's doing the update and it throws a database error back to APEX.
Question: How can I intercept this during the update.
Sure, I can update the other fields and send a flag back to APEX indicating that something is wrong with the date field and APEX can then redirect the user to a "You entered an invalid date field". But then I'm just re-creating the APEX validation that I can't use.
This is where the customer has put me. 8-)
Just wondered if I'm missing something. I guess I could do some formatting validation in the APEX process, but then I'm still just mimicking the APEX-provided validations.
Thanks.
Edited by: semaphore on Sep 15, 2008 8:33 AM

Why can't you validate the date field in apex front end?
You can certainly determine if the field is a valid date or if it falls within a range.
It's just custom item validation that needs to be done.
I have apex pages with start and end dates and I check that end date is greater or equal to start date, etc.
If its got to be a range of dates you can pick a date from a lookup.
You could also populate it from a calendar.

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