'Append a :class:`~.schema.Constraint` to this
:class:`~.schema.Table`.
This has the effect of the constraint being included in any
future CREATE TABLE statement, assuming specific DDL creation
events have not been associated with the given
:class:`~.schema.Constraint` object.
Note that this does **not** produce the constraint within the
relational database automatically, for a table that already exists
in the database.   To add a constraint to an
existing relational database table, the SQL ALTER command must
be used.  SQLAlchemy also provides the
:class:`.AddConstraint` construct which can produce this SQL when
invoked as an executable clause.'

def append_constraint(self, constraint):

    constraint._set_parent_with_dispatch(self)
