text: -- gpa mysql model -s=test/mysql/sql/customer.sql -t=test/mysql/model/customer.go -p=test_mysql_model && gofmt -w test/mysql/model/customer.go
  
  CREATE TABLE `customer`
  (
      `id`          SERIAL PRIMARY KEY,
      `card_id`     SMALLINT     NOT NULL DEFAULT 0 COMMENT 'card id',
      `member_id`   MEDIUMINT             DEFAULT 0 COMMENT 'member id',
      `order`       INT          not null default 12 COMMENT 'order by',
      `name`        VARCHAR(255) NOT NULL,
      `email`       VARCHAR(255) NOT NULL,
      `address`     text                  DEFAULT NULL,
      `create_time` DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
      `update_time` DATETIME              DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
      UNIQUE KEY (`card_id`),
      INDEX (email)
  ) ENGINE = InnoDB
    DEFAULT CHARSET = utf8mb4;