Rename instance_info_cache unique key constraints.

Rename (via drop and recreate) the instance_uuid unique
constraints on the instance_info_cache table so they reflect
the column change name (UUID conversion) we complete in Folsom.

Fixes LP Bug #1080837.

Change-Id: I9dd01ebc896c1d7b51c212980e48db16bad18dec

1 files changed, 65 insertions, 0 deletions

diff --git a/nova/db/sqlalchemy/migrate_repo/versions/143_rename_instance_info_cache_sequence.py b/nova/db/sqlalchemy/migrate_repo/versions/143_rename_instance_info_cache_sequence.py
new file mode 100644
index 000000000..b7b867358
--- /dev/null
+++ b/nova/db/sqlalchemy/migrate_repo/versions/143_rename_instance_info_cache_sequence.py
@@ -0,0 +1,65 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright (c) 2012 Red Hat, 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 migrate.changeset import UniqueConstraint
+from sqlalchemy import MetaData, Table
+
+
+OLD_MYSQL_NAME = 'instance_id'
+NEW_MYSQL_NAME = 'instance_uuid'
+
+OLD_PG_NAME = 'instance_info_caches_instance_id_key'
+NEW_PG_NAME = 'instance_info_caches_instance_uuid_key'
+
+
+def upgrade(migrate_engine):
+    meta = MetaData()
+    meta.bind = migrate_engine
+
+    # NOTE(dprince): Rename the unique key constraints for both MySQL
+    # and PostgreSQL so they reflect the most recent UUID conversions
+    # from Folsom.
+    instance_info_caches = Table('instance_info_caches', meta, autoload=True)
+
+    if migrate_engine.name == "mysql":
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=NEW_MYSQL_NAME).create()
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=OLD_MYSQL_NAME).drop()
+    if migrate_engine.name == "postgresql":
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=NEW_PG_NAME).create()
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=OLD_PG_NAME).drop()
+
+
+def downgrade(migrate_engine):
+    meta = MetaData()
+    meta.bind = migrate_engine
+
+    instance_info_caches = Table('instance_info_caches', meta, autoload=True)
+
+    if migrate_engine.name == "mysql":
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=OLD_MYSQL_NAME).create()
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=NEW_MYSQL_NAME).drop()
+    if migrate_engine.name == "postgresql":
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=OLD_PG_NAME).create()
+        UniqueConstraint('instance_uuid', table=instance_info_caches,
+                         name=NEW_PG_NAME).drop()