为什么悬浮图表的数据出不来？但在数据集里给出参数值就可以显示图表，去掉参数值后就没有数据出来，这是为什么？

这是数据集语句

SELECT

    a.inviter as '邀约人',

    a.inviter_count AS '邀约人数',

    a.participate_count AS '到面人数',

    CASE WHEN a.inviter_count = 0 THEN 0 ELSE a.participate_count / a.inviter_count END AS '到面率',

    a.result_count AS '通过人数',

    CASE WHEN a.participate_count = 0 THEN 0 ELSE a.result_count / a.participate_count END AS '通过率',

    a.employment_count AS '入职人数',

    CASE WHEN a.result_count = 0 THEN 0 ELSE a.employment_count / a.result_count END AS '入职率'

FROM(

    SELECT 

        inviter,

        COUNT(*) AS inviter_count,

        SUM(CASE WHEN participate = '是' THEN 1 ELSE 0 END) AS participate_count,

        SUM(CASE WHEN result = '通过' THEN 1 ELSE 0 END) AS result_count,

        SUM(CASE WHEN employment = '是' THEN 1 ELSE 0 END) AS employment_count 

    FROM dy_zp_information_entry 

    WHERE in_date = '${days}' 

    ${if(len(inviter) == 0,"","AND inviter = '" + inviter + "'")}

    GROUP BY inviter

) a

这是图表的数据字段

这是页面预览