foodie-server/ruoyi-system/src/main/resources/mapper/omgpay/OmgPaymentAttemptMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ruoyi.system.omgpay.mapper.OmgPaymentAttemptMapper">

    <sql id="attemptColumns">
        id, dd_id AS ddId, merchant_trade_no AS merchantTradeNo,
        store_id AS storeId, merchant_id AS merchantId, amount,
        attempt_status AS attemptStatus, active_dd_id AS activeDdId,
        create_time AS createTime, update_time AS updateTime
    </sql>

    <!-- FOR UPDATE serializes concurrent endpoint calls before MerchantTradeNo generation/reuse decisions. -->
    <select id="selectOrderForUpdate"
            resultType="com.ruoyi.system.omgpay.domain.OmgPaymentOrderSnapshot">
        SELECT id, dd_id AS ddId, parent_dd_id AS parentDdId, md_id AS storeId,
               user_id AS userId, amount, state, pay_status AS payStatus, pay_type AS payType
        FROM pos_order WHERE dd_id = #{ddId} LIMIT 1 FOR UPDATE
    </select>

    <select id="selectActiveCreatedByDdId"
            resultType="com.ruoyi.system.omgpay.domain.OmgPaymentAttempt">
        SELECT <include refid="attemptColumns"/>
        FROM pos_order_omg_attempt
        WHERE active_dd_id = #{ddId}
        LIMIT 1
    </select>

    <!-- active_dd_id is a DB-generated key invariant, so Java inserts only the created facts. -->
    <insert id="insertCreated" useGeneratedKeys="true" keyProperty="id">
        INSERT INTO pos_order_omg_attempt
          (dd_id, merchant_trade_no, store_id, merchant_id, amount,
           attempt_status, create_time, update_time)
        VALUES
          (#{ddId}, #{merchantTradeNo}, #{storeId}, #{merchantId}, #{amount},
           #{attemptStatus}, #{createTime}, #{updateTime})
    </insert>
</mapper>