46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log as logging
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from sqlalchemy import Index, MetaData, Table
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from nova.i18n import _LI
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LOG = logging.getLogger(__name__)
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def _get_deleted_expire_index(table):
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members = sorted(['deleted', 'expire'])
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for idx in table.indexes:
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if sorted(idx.columns.keys()) == members:
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return idx
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def upgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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reservations = Table('reservations', meta, autoload=True)
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if _get_deleted_expire_index(reservations):
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LOG.info(_LI('Skipped adding reservations_deleted_expire_idx '
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'because an equivalent index already exists.'))
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return
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# Based on expire_reservations query
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# from: nova/db/sqlalchemy/api.py
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index = Index('reservations_deleted_expire_idx',
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reservations.c.deleted, reservations.c.expire)
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index.create(migrate_engine)
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