WorkflowInstanceMapper.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.show.mapper.WorkflowInstanceMapper">

    <select id="instanceCurrentNode" resultType="com.show.model.WorkflowNode">
        SELECT
            t2.*
        FROM
            workflow_instance t
            LEFT JOIN workflow_node t2 ON t.current_node = t2.id
        WHERE
            t.delete_date IS NULL
            AND t2.delete_date IS NULL
            AND t.id = #{instanceId}
    </select>


</mapper>