SmartSubstationPlatform/riis-system/src/main/resources/mapper/auxcontrol/DeviceWorkDataMapper.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.yfd.platform.modules.auxcontrol.mapper.DeviceWorkDataMapper">

    <select id="getDeviceWorkDataPage" resultType="com.yfd.platform.modules.auxcontrol.domain.DeviceWorkData">
        SELECT
        station_id,
        device_id,
        device_name,
        signal_id,
        signal_name,
        `value`,
        unit,
        start_time
        FROM
        fk_device_work_data
        WHERE 1=1
        AND signal_id=#{signalId}
        <if test="startDate != null and startDate != ''">
            AND start_time &gt;= #{startDate}
        </if>
        <if test="endDate != null and endDate != ''">
            AND start_time &lt;= #{endDate}
        </if>
        ORDER BY start_time DESC

    </select>
    <select id="getHistoricalCurve" resultType="com.yfd.platform.modules.auxcontrol.domain.DeviceWorkData">
        SELECT
        start_time,
        `value`,
        unit
        FROM
        fk_device_work_data
        WHERE
        signal_id=#{signalId}
        AND start_time >= NOW() - INTERVAL 1 HOUR
        ORDER BY
        start_time DESC
    </select>
    <select id="getDeviceWorkData" resultType="java.util.Map">
        SELECT
        di.*,-- 保留第一个子查询的所有字段
        COALESCE ( sub.yc_value, '无' ) AS value
        ,-- 将 NULL 转为 "无"
        di.unit,
        sub.signalId AS sub_signalId,-- 可选：重命名避免字段冲突
        sub.ip AS sub_ip
        FROM
        (
        SELECT
            *,
            JSON_UNQUOTE(
            JSON_EXTRACT( custom1, '$.signalId' )) AS signalId,
            JSON_UNQUOTE(
            JSON_EXTRACT( custom1, '$.unit' )) AS unit,
            JSON_UNQUOTE(
            JSON_EXTRACT( custom1, '$.ip' )) AS ip -- 确保提取的是 ip 字段

        FROM
            sys_dictionary_items
        WHERE
            dictid = 'ca593d0a2a60f7ef37c89e615b97024b'
        ) di
        LEFT JOIN (-- 使用 LEFT JOIN 保留 di 的所有记录
        SELECT
            b.yc_value,
            b.signal_id AS signalId,
            c.ip_addr AS ip
        FROM
            fk_meter_device a
            INNER JOIN fk_device_signal b ON a.device_id = b.meter_device_id
            INNER JOIN fk_gateway_device c ON a.netdevice_ip = c.ip_addr
        ) sub ON di.signalId = sub.signalId
        AND di.ip = sub.ip ORDER BY  orderno;
    </select>
</mapper>