MERGE into使用问题？ Parameter 'b' not found. Available parameters are [list, param1]

Question

报错：
Servlet.service() for servlet [dispatcherServlet] in context with path [/likelong] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'b' not found. Available parameters are [list, param1]] with root cause

org.apache.ibatis.binding.BindingException: Parameter 'b' not found. Available parameters are [list, param1]
服务层代码部分结构：

 List<TSkuPlu> productPage = TSkuPluMapper.selectMyPageByOracle(pageNum,num,queryWrapper);
       Map map = baseMapper.findTest(productPage);

XML部分：

 <insert id="findTest"  parameterType="java.util.Map">
        MERGE into TB_PRODUCT A
        using
       ( select
            #{item.plucode} plucode,
            #{item.pluname} pluname            
            from TSKUPLU
        ) b
        ON (
        A.GOODS_ID=b.plucode
        )
        WHEN MATCHED THEN
        UPDATE SET
        A.NAME=b.pluname       
        WHEN NOT MATCHED THEN
        INSERT (A.GOODS_ID)
        VALUES (b.plucode)

    </insert>

Answer 1

问题解决了：
严格来讲，我的格式是没有问题的。但是xml写错服务方。我有A-》B双方，我做的中间商。这个方法应该写到B的mapper里。新手错误啊，还是逻辑不清晰的问题。