dd3ac9311d
If PostgreSQL version is less than 9.1.13 migration set_length_of_description_field_metering fails as there is no special 'create if not exist' expression. This change add special function for this case. Closes-bug: #1348138 Change-Id: Ibe4f370fe400072abd281bd2313261790335eae2
68 lines
2.8 KiB
Python
68 lines
2.8 KiB
Python
# Copyright 2012 New Dream Network, LLC (DreamHost)
|
|
#
|
|
# 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.
|
|
#
|
|
# @author: Mark McClain, DreamHost
|
|
|
|
from alembic import op
|
|
import sqlalchemy as sa
|
|
|
|
OVS_PLUGIN = ('neutron.plugins.openvswitch.ovs_neutron_plugin'
|
|
'.OVSNeutronPluginV2')
|
|
CISCO_PLUGIN = 'neutron.plugins.cisco.network_plugin.PluginV2'
|
|
|
|
|
|
def should_run(active_plugins, migrate_plugins):
|
|
if '*' in migrate_plugins:
|
|
return True
|
|
else:
|
|
if (CISCO_PLUGIN not in migrate_plugins and
|
|
OVS_PLUGIN in migrate_plugins):
|
|
migrate_plugins.append(CISCO_PLUGIN)
|
|
return set(active_plugins) & set(migrate_plugins)
|
|
|
|
|
|
def alter_enum(table, column, enum_type, nullable):
|
|
bind = op.get_bind()
|
|
engine = bind.engine
|
|
if engine.name == 'postgresql':
|
|
values = {'table': table,
|
|
'column': column,
|
|
'name': enum_type.name}
|
|
op.execute("ALTER TYPE %(name)s RENAME TO old_%(name)s" % values)
|
|
enum_type.create(bind, checkfirst=False)
|
|
op.execute("ALTER TABLE %(table)s RENAME COLUMN %(column)s TO "
|
|
"old_%(column)s" % values)
|
|
op.add_column(table, sa.Column(column, enum_type, nullable=nullable))
|
|
op.execute("UPDATE %(table)s SET %(column)s = "
|
|
"old_%(column)s::text::%(name)s" % values)
|
|
op.execute("ALTER TABLE %(table)s DROP COLUMN old_%(column)s" % values)
|
|
op.execute("DROP TYPE old_%(name)s" % values)
|
|
else:
|
|
op.alter_column(table, column, type_=enum_type,
|
|
existing_nullable=nullable)
|
|
|
|
|
|
def create_table_if_not_exist_psql(table_name, values):
|
|
if op.get_bind().engine.dialect.server_version_info < (9, 1, 0):
|
|
op.execute("CREATE LANGUAGE plpgsql")
|
|
op.execute("CREATE OR REPLACE FUNCTION execute(TEXT) RETURNS VOID AS $$"
|
|
"BEGIN EXECUTE $1; END;"
|
|
"$$ LANGUAGE plpgsql STRICT;")
|
|
op.execute("CREATE OR REPLACE FUNCTION table_exist(TEXT) RETURNS bool as "
|
|
"$$ SELECT exists(select 1 from pg_class where relname=$1);"
|
|
"$$ language sql STRICT;")
|
|
op.execute("SELECT execute($$CREATE TABLE %(name)s %(columns)s $$) "
|
|
"WHERE NOT table_exist(%(name)r);" %
|
|
{'name': table_name,
|
|
'columns': values}) |