I have an application with a big database file ( + 60 GB), with 128 tables. (4D 
v17)

All id fields and foreign keys are of type longint. 

Now, for replication and sharing purposes, I would like to change the type to 
UID.

The process seems quite cumbersome: to start, I need to remove the ‘primary 
key’ flag from all the ID fields, then I need to add UID fields to every table, 
change the foreign keys as well, and use apply formula to make sure the 
relations are intact. I am a bit worried that this will have a major impact on 
the size of the data file.

Furthermore, I need to automate the whole process so the upgrade works 
flawlessly at the customers site.

Has anyone ever done this?
Any tips?

Regards,

Rudy Mortier
Two Way Communications bvba 

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