I have a table, let’s call it Users. This table has primary key called Id. Despite having Id as primary key (unique clustered), it has other index (unique nonclustered) on the same column(Id).
I would like to drop this constraint, but foreign keys reference this unique nonclustered index and I get The constraint ... is being referenced by table... error.
What is the best way to drop such index? Do you have any scripts that drop, do something, and recreate foreign key on specific column in specific table? There is a lot of foreign keys, so it would be nice if I could do it automatically. I could use INFORMATION_SCHEMA and other system object to extract information about these keys, but I don’t want to write, what have already been written or can be done in other way.
In order to drop a nonclustered index that is referenced by a foreign key you must furst drop the foreign key constraint.
Take a look at the following scrips available from a poster over at SQL Server Central. They may require some tweaking for your “exact” requirements however they provide the basis for scripting out and then subsequently rebuilding foreign keys.
Scrip out Foreign Keys