text: -- migrate:up
  
  BEGIN;
  
  SET FOREIGN_KEY_CHECKS = 0;
  
  ALTER TABLE `tournament` ADD INDEX `idx_tournament_created_450ed3` (`created_at`, `updated_at`);
  ALTER TABLE `team` ADD COLUMN `description` LONGTEXT COMMENT '描述' AFTER `updated_at`;
  
  SET FOREIGN_KEY_CHECKS = 1;
  
  COMMIT;
  
  -- migrate:down
  
  BEGIN;
  
  SET FOREIGN_KEY_CHECKS = 0;
  
  ALTER TABLE `team` DROP COLUMN `description`;
  ALTER TABLE `tournament` DROP INDEX `idx_tournament_created_450ed3`;
  
  SET FOREIGN_KEY_CHECKS = 1;
  
  COMMIT;