add index to instance_uuid column in instances

Change-Id: I4d5313cfbd97eba7bd755567a0bed9b65adb14dc

1 files changed, 29 insertions, 0 deletions

diff --git a/nova/db/sqlalchemy/migrate_repo/versions/061_add_index_to_instance_uuid.py b/nova/db/sqlalchemy/migrate_repo/versions/061_add_index_to_instance_uuid.py
new file mode 100644
index 000000000..0ec06b66d
--- /dev/null
+++ b/nova/db/sqlalchemy/migrate_repo/versions/061_add_index_to_instance_uuid.py
@@ -0,0 +1,29 @@
+# Copyright 2011 OpenStack LLC.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from sqlalchemy import Index, MetaData, Table
+
+meta = MetaData()
+
+
+def upgrade(migrate_engine):
+    meta.bind = migrate_engine
+    instances = Table('instances', meta, autoload=True)
+    Index('uuid', instances.c.uuid, unique=True).create(migrate_engine)
+
+
+def downgrade(migrate_engine):
+    meta.bind = migrate_engine
+    instances = Table('instances', meta, autoload=True)
+    Index('uuid', instances.c.uuid, unique=True).drop(migrate_engine)