Question

两个域实体：

public class FunRole implements Serializable {
    private static final long serialVersionUID = 1L;

    private long id;

    private String role;

    private Function function;
}


public class Function implements Serializable {
    private static final long serialVersionUID = 1L;

    private long id;

    private String code;

    private String desc;

    private BigDecimal ftype;

    private BigDecimal parentid;

    private Set<FunRole> funRoles;
}

有两个表：

many
  "FUN_ROLE" 
   (    "ID" NUMBER, 
    "ROLE" VARCHAR2(40 BYTE), 
    "FUNCTIONID" NUMBER(foreign key)
   )
one:
"FUNCTION" 
   (    "ID" NUMBER(*,0), (primary key)
    "CODE" VARCHAR2(40 BYTE), 
    "DESC" VARCHAR2(4000 BYTE), 
    "FTYPE" NUMBER(38,0), 
    "PARENTID" NUMBER(*,0)
   )

当我使用jpa和hibernate查询Pagination时，但是第一页结果和第二页有相同的数据，我不知道为什么？ jpql查询是：

select g from FunRole g join g.function f where g.role =:role order by g.role asc,f.ftype asc

并且sql是：

select
        * 
    from
        ( select
            car0_.id as id5_,
            car0_.FUNCTIONID as FUNCTIONID5_,
            car0_."ROLE" as ROLE2_5_ 
        from
            FUN_ROLE car0_,
            FUNCTION car1_ 
        where
            car0_.FUNCTIONID=car1_.id 
            and car0_."ROLE"='Operator' 
        order by
            car0_."ROLE" asc,
            car1_.ftype asc ) 
    where
        rownum <= 10;

        select
        * 
    from
        ( select
            row_.*,
            rownum rownum_ 
        from
            ( select
                car0_.id as id0_,
                car0_.FUNCTIONID as FUNCTIONID0_,
                car0_."ROLE" as ROLE2_0_ 
            from
                FUN_ROLE car0_,
                FUNCTION car1_ 
            where
                car0_.FUNCTIONID=car1_.id 
                and car0_."ROLE"='Operator'
            order by
                car0_."ROLE" asc,
                car1_.ftype asc ) row_ ) 
        where
            rownum_ <= 10
            and rownum_ > 0;

，数据结果为：

the first page data:
id:2150,funId:1051,ftype:1,
id:1,funId:1,ftype:1,
id:27,funId:22,ftype:2,
id:2251,funId:6,ftype:2,
id:2250,funId:5,ftype:2,
id:5,funId:4,ftype:2,
id:24,funId:20,ftype:2,--*reqeat*
id:23,funId:19,ftype:2,--*reqeat*
id:2255,funId:18,ftype:2,--*reqeat*
id:2254,funId:17,ftype:2,--*reqeat*
==============================
the second page data is 
id:2102,funId:2100,ftype:2,
id:39,funId:33,ftype:2,
id:2254,funId:17,ftype:2,--*reqeat*
id:2255,funId:18,ftype:2,--*reqeat*
id:23,funId:19,ftype:2,--*reqeat*
id:24,funId:20,ftype:2,--*reqeat*
id:13,funId:11,ftype:3,
id:14,funId:12,ftype:3,
id:12,funId:10,ftype:3,
id:11,funId:9,ftype:3,

为什么jpa manytoone orderby Pagination，结果重复？

0 个答案: