Deprecate primaryKey in favour of primaryKeys

[peterdesmet]

For consistency, I think we should deprecate primaryKey in favour of primaryKeys:

I notice myself typing primaryKeys (plural), forgetting that is not a property of Table Schema.

[khusmann]

Hmmm isn't it more correct in the singular? Although the primary key for a table may be determined by multiple fields, there is only one primary key definition per table. Whereas many foreign key and unique key definitions can exist simultaneously in a given table, so the plural there makes sense.

I'm less familiar with DB design so maybe I'm missing something?