用户表用户名大小写敏感

原始表修改

# 原始表新增new_username 
ALTER TABLE sys_users CHANGE username new_username VARCHAR(191) CHARACTER SET utf8 COLLATE utf8_bin;
# 原始表修改username 
ALTER TABLE sys_users MODIFY username VARCHAR(191) CHARACTER SET utf8 COLLATE utf8_bin;

创建

CREATE TABLE sys_users_new (
    id INT,
    username VARCHAR(191) CHARACTER SET utf8 COLLATE utf8_bin,
    -- 其他字段...
);