DROP TABLE IF EXISTS `t_sensitive_messages`;
CREATE TABLE `t_sensitive_messages` (
  `id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
  `_mid` bigint(20) NOT NULL,
  `_from` varchar(64) NOT NULL,
  `_type` tinyint NOT NULL DEFAULT 0,
  `_target` varchar(64) NOT NULL,
  `_line` int(11) NOT NULL DEFAULT 0,
  `_data` BLOB NOT NULL,
  `_searchable_key` TEXT DEFAULT NULL,
  `_dt` DATETIME NOT NULL DEFAULT NOW(),
  `_content_type` int(11) NOT NULL DEFAULT 0,
  UNIQUE INDEX `sensitive_message_uid_index` (`_mid` ASC)
);