columns.py 文件源码

def load_dialect_impl(self, dialect):
        if dialect.name == 'postgresql' and self.native:
            # Use the native UUID type.
            return dialect.type_descriptor(postgresql.UUID())
        else:
            # Fallback to either a BINARY or a CHAR.
            kind = types.BINARY(16)
            return dialect.type_descriptor(kind)