text: DROP TABLE IF EXISTS `bb_alipay`;
  CREATE TABLE bb_alipay (
    id          bigint(11) unsigned NOT NULL AUTO_INCREMENT,
    project_id  varchar(32)         NOT NULL,
    seller      varchar(32)         NOT NULL,
    private_key text                NOT NULL,
    public_key  text                NOT NULL,
    created_at  timestamp                    DEFAULT CURRENT_TIMESTAMP,
    updated_at  timestamp                    DEFAULT CURRENT_TIMESTAMP
    ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id)
  )
    ENGINE = InnoDB
    DEFAULT CHARSET = utf8;
  CREATE INDEX bb_alipay
    on bb_alipay (project_id);