I know this would be a better choice. But I can't right now. The application is based on the unique keys. I will be refactoring the app step-by-step. Now I need to make it works with current design.
Thank you.
>Use integers as keys.
>
>>Hi,
>>
>>I ran into the following issue (not major but I want to see if there is a simple way around it). I have a foreign key constraint set in child tables on a unique field in a parent table. I want to change the unique field expression in the parent table (instead of just one field to make it on two fields). When I try to change the unique index key I get a message that 'the primary key or unique constraint cannot be changed until its existing relationships are deleted.' This means that I have to delete the FK constraints on all child tables; then change this unique key, and then create FK constraints again. Is there a simpler method? TIA.
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