Failed to issue SQL query: query = CREATE TABLE `attachment` (`id` INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY, `expire` DATETIME NULL, `temp_id` VARCHAR(255) NULL, `item_class` VARCHAR(255) NOT NULL, `item_id` VARCHAR(255) NULL, `item_org_id` INT(11) NULL, `contents_data` LONGBLOB NOT NULL, `contents_mimetype` VARCHAR(255) NOT NULL, `contents_filename` VARCHAR(255) NOT NULL, INDEX `temp_id` (`temp_id`), INDEX `item_class_item_id` (`item_class`, `item_id`), INDEX `item_org_id` (`item_org_id`)) ENGINE = innodb CHARACTER SET utf8 COLLATE utf8_unicode_ci, mysql_error = Specified key was too long; max key length is 1000 bytes, mysql_errno = 1071

mysql的模式改为innodb就没事了

以前安装过一次吧？把wamp文件夹也删了，从wamp开始重新装一下就好了

我也同样的问题，到40%报错

和mysql有关系吗