-- remove xml column, and change data format (clear cache needed)
DELETE FROM `kolab_folders`;
ALTER TABLE `kolab_cache_contact` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_event` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_task` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_journal` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_note` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_file` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_configuration` DROP COLUMN `xml`;
ALTER TABLE `kolab_cache_freebusy` DROP COLUMN `xml`;