db schema improvements: openstack entity id set to 64 length

Columns like device id, tenant id and Type, status
set to the 64 length as it does not have values beyond
this length.

Closes-bug: #1587579

Change-Id: Ib0193f5db889f7f73f2cab0ea7158585eb1e2e5c

tacker/db/migration/alembic_migrations/versions/b07673bb8654_set_status_type_tenant_id_length.py

@@ -0,0 +1,54 @@
+# Copyright 2016 OpenStack Foundation
+#
+#    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.
+#
+
+"""set-status-type-tenant-id-length
+
+Revision ID: b07673bb8654
+Revises: c7cde2f45f82
+Create Date: 2016-06-01 12:46:07.499279
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'b07673bb8654'
+down_revision = 'c7cde2f45f82'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade(active_plugins=None, options=None):
+    for table in ['devices', 'devicetemplates', 'vims', 'servicetypes']:
+        op.alter_column(table,
+                        'tenant_id',
+                        type_=sa.String(64))
+    op.alter_column('vims',
+                    'type',
+                    type_=sa.String(64))
+    op.alter_column('devices',
+                    'instance_id',
+                    type_=sa.String(64))
+    op.alter_column('devices',
+                    'status',
+                    type_=sa.String(64))
+    op.alter_column('proxymgmtports',
+                    'device_id',
+                    type_=sa.String(64))
+    op.alter_column('proxyserviceports',
+                    'service_instance_id',
+                    type_=sa.String(64))
+    op.alter_column('servicetypes',
+                    'service_type',
+                    type_=sa.String(64))