ALTER TABLE `session` ADD COLUMN `created` datetime NOT NULL DEFAULT '1000-01-01 00:00:00';

ALTER TABLE `session` MODIFY `ip` varchar(40) NOT NULL;

ALTER TABLE `dictionary` DROP COLUMN `id`;

DROP TABLE `cache`;
DROP TABLE `cache_shared`;

CREATE TABLE `cache` (
 `user_id` int(10) UNSIGNED NOT NULL,
 `cache_key` varchar(128) /*!40101 CHARACTER SET ascii COLLATE ascii_general_ci */ NOT NULL,
 `created` datetime NOT NULL DEFAULT '1000-01-01 00:00:00',
 `expires` datetime DEFAULT NULL,
 `data` longtext NOT NULL,
 CONSTRAINT `user_id_fk_cache` FOREIGN KEY (`user_id`)
   REFERENCES `users`(`user_id`) ON DELETE CASCADE ON UPDATE CASCADE,
 INDEX `expires_index` (`expires`),
 INDEX `user_cache_index` (`user_id`,`cache_key`)
) /*!40000 ENGINE=INNODB */ /*!40101 CHARACTER SET utf8 COLLATE utf8_general_ci */;

CREATE TABLE `cache_shared` (
 `cache_key` varchar(255) /*!40101 CHARACTER SET ascii COLLATE ascii_general_ci */ NOT NULL,
 `created` datetime NOT NULL DEFAULT '1000-01-01 00:00:00',
 `expires` datetime DEFAULT NULL,
 `data` longtext NOT NULL,
 INDEX `expires_index` (`expires`),
 INDEX `cache_key_index` (`cache_key`)
) /*!40000 ENGINE=INNODB */ /*!40101 CHARACTER SET utf8 COLLATE utf8_general_ci */;
