-- 删除创单后置步骤表（已不再使用）。可重复执行。

SET @db := DATABASE();

SET @exists := (
  SELECT COUNT(1)
  FROM information_schema.TABLES
  WHERE TABLE_SCHEMA = @db
    AND TABLE_NAME = 't_order_side_effect'
);

SET @sql := IF(
  @exists > 0,
  'DROP TABLE `t_order_side_effect`',
  'SELECT ''t_order_side_effect already dropped'' AS info'
);

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;