Add indexes to new instance_uuid columns.

Resolves bug 1009738 as well as several other bugs that haven't been
reported yet.

Change-Id: I09b456df70aaaba1bc4ac00514e63bda804d7f92

1 files changed, 43 insertions, 0 deletions

diff --git a/nova/db/sqlalchemy/migrate_repo/versions/103_instance_indexes.py b/nova/db/sqlalchemy/migrate_repo/versions/103_instance_indexes.py
new file mode 100644
index 000000000..0eeac2587
--- /dev/null
+++ b/nova/db/sqlalchemy/migrate_repo/versions/103_instance_indexes.py
@@ -0,0 +1,43 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2011 OpenStack LLC.
+# Copyright 2012 Michael Still and Canonical Inc
+# All Rights Reserved.
+#
+#    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
+
+
+def upgrade(migrate_engine):
+    meta = MetaData()
+    meta.bind = migrate_engine
+
+    for table in ['block_device_mapping',
+                  'consoles',
+                  'volumes']:
+        t = Table(table, meta, autoload=True)
+        i = Index('%s_instance_uuid_idx' % table, t.c.instance_uuid)
+        i.create(migrate_engine)
+
+
+def downgrade(migrate_engine):
+    meta = MetaData()
+    meta.bind = migrate_engine
+
+    for table in ['block_device_mapping',
+                  'consoles',
+                  'volumes']:
+        t = Table(table, meta, autoload=True)
+        i = Index('%s_instance_uuid_idx' % table, t.c.instance_uuid)
+        i.drop(migrate_engine)