/usr/lib/python2.7/dist-packages/txdav/common/datastore/sql_schema/upgrades/postgres-dialect/upgrade_from_21_to_22.sql is in calendarserver 5.2+dfsg-1.
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-- Copyright (c) 2011-2014 Apple 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.
----
---------------------------------------------------
-- Upgrade database schema from VERSION 21 to 22 --
---------------------------------------------------
-- Calendar home related updates
alter table CALENDAR_HOME_METADATA
add column AVAILABILITY text default null;
-- Calendar bind related updates
alter table CALENDAR_BIND
add column TIMEZONE text default null;
-- update schema version
update CALENDARSERVER set VALUE = '22' where NAME = 'VERSION';
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