22 lines
713 B
XML
22 lines
713 B
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="io.as.modules.daycard.dao.DayCardPoolDao">
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<!-- 使用 FOR UPDATE SKIP LOCKED 抢占一张未使用的天卡，避免并发下单分配到同一张卡 -->
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<select id="selectOneForUpdateSkipLocked" resultType="io.as.modules.daycard.entity.DayCardPoolEntity">
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SELECT * FROM day_card_pool
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WHERE delete_flag = 'UNDEL'
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AND (
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status = 'UNUSED'
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OR (status = 'REUSABLE' AND expire_at > NOW())
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)
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ORDER BY
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CASE WHEN status = 'REUSABLE' THEN 0 ELSE 1 END,
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id ASC
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LIMIT 1
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FOR UPDATE SKIP LOCKED
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</select>
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</mapper>
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