hibernate 查询笛卡尔积问题



今天写了一个hql作查询，结果查询出很多条重复的记录，肯定做了笛卡尔积，我一直很疑惑一个问题就是，怎样判断这个查询语句中是否一定会做笛卡尔积，我也做了表之间的关联，可能关联的不全也不知道怎么回事，怎么避免这种情况呢？我把控制台打印sql复制如下，哪位大牛了解的给小弟解析下，千恩万谢，我已经困惑很久了。

select
             tkcbh0_.KCBHID as KCBHID38_,
            tkcbh0_.CKDID as CKDID38_,
            tkcbh0_.CKRK as CKRK38_,
            tkcbh0_.CREATEDBY as CREATEDBY38_,
            tkcbh0_.CREATEDTIME as CREATEDT3_38_,
            tkcbh0_.CRKSJ as CRKSJ38_,
            tkcbh0_.CRKSL as CRKSL38_,
            tkcbh0_.CZR as CZR38_,
            tkcbh0_.DElETEDBY as DElETEDBY38_,
            tkcbh0_.DELETEDFLAG as DELETEDF6_38_,
            tkcbh0_.DELETEDTIME as DELETEDT7_38_,
            tkcbh0_.MODIFIEDBY as MODIFIEDBY38_,
            tkcbh0_.MODIFIEDTIME as MODIFIED8_38_,
            tkcbh0_.RKDID as RKDID38_,
            tkcbh0_.WZID as WZID38_ 
        from
            t_kcbh tkcbh0_,
            T_CKD tckd1_,
            t_rkd trkd2_ 
        where
             (
                tkcbh0_.DELETEDFLAG=0 
             )
            and(
                (
                    tckd1_.DJBH like '%6%' escape '/'  
                    and tkcbh0_.CKDID=tckd1_.CKDID
                )
                OR(
                    trkd2_.DJBH like '%6%' escape '/'  
                    and tkcbh0_.RKDID=trkd2_.RKDID
                )
        &