I posted a couple of weeks back a question regarding the use of a 100 char column as a primary key and the responses uniformily advised the use of a serial column. My concern is that the key is effectively abstract and I want to use the column as a foreign key in other tables.
I have a simple question... why do you want to use the column as a foreign key in other tables? If you use the serial column then all you need is a simple join to get the 100 char column out in your query. If you need to make things simpler, just create a view that does the join for you.
Either there is some requirement here that I am not aware of or it sounds like you may be trying to use a sledge hammer on a nail.
