- ALTER TABLE `zt_file` CHANGE `pathname` `pathname` char(100) NOT NULL;
- TRUNCATE `zt_im_usermessage`;
- ALTER TABLE `zt_im_usermessage` DROP `module`;
- ALTER TABLE `zt_im_usermessage` DROP `method`;
- ALTER TABLE `zt_im_usermessage` CHANGE `data` `message` text not null;
- DROP TABLE IF EXISTS `zt_im_chatfile`;
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