ALTER TABLE `test`
ADD COLUMN `avatarbase64tmpsave` mediumblob NULL COMMENT '待优化方案:头像的base64编码;后端透明存储';
SET GLOBAL max_allowed_packet=67108864;
SHOW GLOBAL VARIABLES LIKE "%packet%";
ALTER TABLE `test`
ADD COLUMN `avatarbase64tmpsave` mediumblob NULL COMMENT '待优化方案:头像的base64编码;后端透明存储';
SET GLOBAL max_allowed_packet=67108864;
SHOW GLOBAL VARIABLES LIKE "%packet%";