> The developers spent a good chunk of the late 90s/2000s writing Oracle PL/SQL code; hundreds of packages and thousands of stored procedures with oodles of business logic.

I've developed a hypothetical approach for versioning of stored procedures within the model described here as part of Alembic, known as "replaceable objects": http://alembic.readthedocs.org/en/latest/cookbook.html#repla...