VFP 6 via ODBC and data integrity questions

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Good day all,

I have just began work on a project to let users subscribe to a service and place orders into a database that is VFP 6 based.

Using PHP4, I am able to interface with their program (that also uses ODBC locally) in all aspects (INSERT, UPDATE, DELETE, and SELECT).

My worries come when inserting a new user/order from the web.

The morons who designed the database made the Primary Key as character and NULLable (once only of course), but I have to deal with that.

My question is this...

How can I know the new user I INSERT will be unique? (the field is character, but counts like a number field) This especially holds true since I have to deal with local users possibly adding at the exact same moment as PHP (ie. a racing issue).

Can anyone tell me how to avoid problems?

Would odbc_prepare() reserve a new key for me?

Thanks.

Brian
PJC Services

P.S. Kudos to all of the developers. This is a great job you guys are doing.

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