Hi Erik, I have a question about primary keys. As far as I can see you're currently using the first field of the relation as a primary key. While that's what other databases do (and it is working well), I think it would be better to make _records_ themselves primary keys. Since records are immutable they are guaranteed to be unique and comparing them is essentially free. I have a feeling that would make whole lot of things much easier (no need to check the primary key field for uniqueness, no need to implement auto increment mechanisms, foreign keys would just become actual records). What do you think about it?
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