roundcubemail-plugins-kolab/plugins/calendar/drivers/database/SQL/mysql/2015022700.sql

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-- add identifier for recurring instances and exceptions
ALTER TABLE `events` ADD `instance` varchar(16) NOT NULL DEFAULT '' AFTER `uid`;
ALTER TABLE `events` ADD `isexception` tinyint(1) NOT NULL DEFAULT '0' AFTER `instance`;
UPDATE `events` SET `instance` = DATE_FORMAT(`start`, '%Y%m%d')
WHERE `recurrence_id` != 0 AND `instance` = '' AND `all_day` = 1;
UPDATE `events` SET `instance` = DATE_FORMAT(`start`, '%Y%m%dT%k%i%s')
WHERE `recurrence_id` != 0 AND `instance` = '' AND `all_day` = 0;
-- extend alarms columns for multiple values
ALTER TABLE `events` CHANGE `alarms` `alarms` TEXT NULL DEFAULT NULL;