'Target must support UPDATE where the same table is present in a
subquery in the WHERE clause.
This is an ANSI-standard syntax that apparently MySQL can\'t handle,
such as:
UPDATE documents SET flag=1 WHERE documents.title IN
(SELECT max(documents.title) AS title
FROM documents GROUP BY documents.user_id'

@property
def update_where_target_in_subquery(self):

    return exclusions.open()
