Is it really duck typed if no static type checking is performed on the SQL? Duck typing to me seems to imply checking quacks and waddles at "compile" time. I would think it's at most loosely typed and at worst dynamically typed.

EDIT: Without the new strict mode of course, where it is not duck typed but typed by name.

EDIT 2: Actually maybe duck typing is fine to use for dynamic languages too. The affinity of INT keys and stuff is sort of duck typing I guess.