-- prc_order_bill_ext：计费订单扩展（TAB_ORDER 剩余字段）
SET NAMES utf8mb4;

CREATE TABLE IF NOT EXISTS prc_order_bill_ext (
  bill_id     VARCHAR(36)  NOT NULL COMMENT '计费订单ID，对应 prc_order_bill.bill_id',
  order_no    VARCHAR(64)  NOT NULL COMMENT '订单号',
  create_time DATETIME     NOT NULL COMMENT '创建时间',
  update_time DATETIME     DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (bill_id),
  UNIQUE KEY uk_order_bill_ext_order (order_no),
  CONSTRAINT fk_order_bill_ext_bill FOREIGN KEY (bill_id) REFERENCES prc_order_bill (bill_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='订单计费扩展表';