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Mike Bayer
80b90cbcfe
Fixed the class hierarchy for the :class:`_schema.Sequence` and the more general :class:`_schema.DefaultGenerator` base, as these are "executable" as statements they need to include :class:`_sql.Executable` in their hierarchy, not just :class:`_roles.StatementRole` as was applied arbitrarily to :class:`_schema.Sequence` previously. The fix allows :class:`_schema.Sequence` to work in all ``.execute()`` methods including with :meth:`_orm.Session.execute` which was not working in the case that a ``do_orm_execute()`` handler was also established. Fixes: #6668 Change-Id: I0d192258c7cbd1bce2552f9e748e8fdd680dc45f