Is that for the same reason that stored procedures, column constraints, indexes, and performance are not tested the same way any other code is? When I write a

Is that for the same reason that stored procedures, column constraints, indexes, and performance are not tested the same way any other code is? When I write a schema, I plan for testing it with dummy data. If it's PostgreSQL I write a test using PGTap. It's code. You test it. I don't get why everyone doesn't get that.