Postgre does not work as a backend with congress

http://logs2.aaronorosen.com/71/135471/2/check/dsvm-tempest-full-congress-pg/efde7db/logs/screen-congress.txt.gz#_2014-11-18_18_16_21_716

2014-11-18 18:16:21.716 804 DEBUG congress.dse.deepsix [-] d6cage:: updateRoutes msgbody: {'keys': ['allservices', 'local.allservices']} log_debug /opt/stack/new/congress/congress/dse/deepsix.py:563
2014-11-18 18:16:21.729 804 ERROR oslo.db.sqlalchemy.exc_filters [-] DBAPIError exception wrapped from (ProgrammingError) operator does not exist: character varying = integer
LINE 3: ...olicy_rules.policy_name IS NULL AND policy_rules.deleted = 0
                                                                    ^
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
 'SELECT policy_rules.id AS policy_rules_id, policy_rules.created_at AS policy_rules_created_at, policy_rules.updated_at AS policy_rules_updated_at, policy_rules.deleted_at AS policy_rules_deleted_at, policy_rules.deleted AS policy_rules_deleted, policy_rules.rule AS policy_rules_rule, policy_rules.policy_name AS policy_rules_policy_name, policy_rules.comment AS policy_rules_comment \nFROM policy_rules \nWHERE policy_rules.policy_name IS NULL AND policy_rules.deleted = %(deleted_1)s' {'deleted_1': 0}
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters Traceback (most recent call last):
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters File "/usr/local/lib/python2.7/dist-packages/oslo/db/sqlalchemy/compat/handle_error.py", line 59, in _handle_dbapi_exception
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters e, statement, parameters, cursor, context)
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1024, in _handle_dbapi_exception
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters exc_info
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters File "/usr/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 196, in raise_from_cause
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters reraise(type(exception), exception, tb=exc_tb)
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 867, in _execute_context
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters context)
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 324, in do_execute
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters cursor.execute(statement, parameters)
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters ProgrammingError: (ProgrammingError) operator does not exist: character varying = integer
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters LINE 3: ...olicy_rules.policy_name IS NULL AND policy_rules.deleted = 0
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters ^
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters 'SELECT policy_rules.id AS policy_rules_id, policy_rules.created_at AS policy_rules_created_at, policy_rules.updated_at AS policy_rules_updated_at, policy_rules.deleted_at AS policy_rules_deleted_at, policy_rules.deleted AS policy_rules_deleted, policy_rules.rule AS policy_rules_rule, policy_rules.policy_name AS policy_rules_policy_name, policy_rules.comment AS policy_rules_comment \nFROM policy_rules \nWHERE policy_rules.policy_name IS NULL AND policy_rules.deleted = %(deleted_1)s' {'deleted_1': 0}
2014-11-18 18:16:21.729 804 TRACE oslo.db.sqlalchemy.exc_filters
2014-11-18 18:16:21.781 804 DEBUG congress.service [-] (ProgrammingError) operator does not exist: character varying = integer

I think we need to do something like this: https://review.openstack.org/#/c/135485/