java - 运行 Hibernate Criteria 时，未按给定顺序创建 HQL 查询

Question

在运行 Hibernate Criteria 时，HQL 查询未按给定顺序创建 并显示异常

  ERROR SqlExceptionHelper:131 - Unknown column 'stsup4_.SUPPLIER_ID' in 'on clause'

生成的 HQL 未按预期顺序创建。 当我在 mysql 中运行生成的相同 HQL 并进行一些更改时，我得到了输出。

Java代码如下

        Session session = connector.getSession();
        Criteria cr = session.createCriteria(ST_PRODUCTMASTER.class, "ST_PRODUCT");
        cr.createCriteria("ST_PRODUCT.ST_PRODUCT_MANUFACTURER_PARENT", "STPRODMAN", JoinType.LEFT_OUTER_JOIN, Restrictions.eq("PROD_MAN_STATUS", "ACTIVE"));
        cr.createCriteria("STPRODMAN.ST_MANUFACTURER", "STMAN", JoinType.LEFT_OUTER_JOIN);
        cr.createCriteria("ST_PRODUCT.ST_PRODUCT_SUPPLIER_PARENT", "STPRODSUP", JoinType.LEFT_OUTER_JOIN, Restrictions.eq("PROD_SUPPLIER_STATUS", "ACTIVE"));
        cr.createCriteria("STPRODSUP.ST_SUPPLIER", "STSUP", JoinType.LEFT_OUTER_JOIN);
        cr.createCriteria("ST_PRODUCT.ST_PRODUCT_RATES", "ZSTPR", JoinType.LEFT_OUTER_JOIN,  Restrictions.eqProperty("ST_SUPPLIER.SUPPLIER_ID", "STSUP.SUPPLIER_ID"));
        cr.createCriteria("ST_PRODUCT.ST_MEDICINE_CATEGORY", "MEDI_CAT", JoinType.LEFT_OUTER_JOIN);
        cr.createCriteria("ST_PRODUCT.ST_TAX_MASTER", "TAX", JoinType.INNER_JOIN);
        cr.createCriteria("ST_PRODUCT.ST_UNIT", "UNIT", JoinType.INNER_JOIN);
        cr.add(Restrictions.eq("ST_PRODUCT.PRODUCT_STATUS", "ACTIVE"));


        ProjectionList p1 = Projections.projectionList();
        p1.add(Projections.property("ST_PRODUCT.PRODUCT_ID"));
        p1.add(Projections.property("ST_PRODUCT.PRODUCT_NAME"));
        p1.add(Projections.property("UNIT.UNIT_DISPLAY_UNIT"));
        p1.add(Projections.property("TAX.TAX_PURCHASE"));
        p1.add(Projections.property("ST_PRODUCT.PRODUCT2_DISCOUNT"));
        p1.add(Projections.property("ST_PRODUCT.PRODUCT2_DIS_AMOUNT"));
        p1.add(Projections.property("ST_MEDICINE_CATEGORY.CAT_CATEGORY_ID"));
        p1.add(Projections.property("MEDI_CAT.CAT_SHORT_NAME"));
        p1.add(Projections.property("UNIT.UNIT_ID"));
        p1.add(Projections.property("TAX.TAX_ID"));
        //MANUFACTURER
        p1.add(Projections.property("STMAN.MAN_ID"));
        p1.add(Projections.property("STPRODMAN.BASE_LEVEL"));
        p1.add(Projections.property("STPRODMAN.FREE_QTY"));
        //SUPPLIER
        p1.add(Projections.property("STSUP.SUPPLIER_ID"));
        p1.add(Projections.property("STPRODSUP.BASE_LEVEL"));
        p1.add(Projections.property("STPRODSUP.FREE_QTY"));

        cr.setProjection(p1);
        List l = cr.list();
        System.out.println("Size items::" + l.size());

错误 SqlExceptionHelper:131 - “on 子句”中的未知列“stsup4_.SUPPLIER_ID” 这是 Hibernate 生成的 SQL

    select
    this_.PRODUCT_ID as y0_,
    this_.PRODUCT_NAME as y1_,
    unit8_.UNIT_DISPLAY_UNIT as y2_,
    tax7_.TAX_PURCHASE as y3_,
    this_.PRODUCT2_DISCOUNT as y4_,
    this_.PRODUCT2_DIS_AMOUNT as y5_,
    this_.CAT_CATEGORY_ID as y6_,
    medi_cat6_.CAT_SHORT_NAME as y7_,
    unit8_.UNIT_ID as y8_,
    tax7_.TAX_ID as y9_,
    stman2_.MAN_ID as y10_,
    stprodman1_.BASE_LEVEL as y11_,
    stprodman1_.FREE_QTY as y12_,
    stsup4_.SUPPLIER_ID as y13_,
    stprodsup3_.BASE_LEVEL as y14_,
    stprodsup3_.FREE_QTY as y15_ 
from
    ST_PRODUCTMASTER this_ 
left outer join
    ST_MEDICINE_CATEGORY medi_cat6_ 
        on this_.CAT_CATEGORY_ID=medi_cat6_.CAT_CATEGORY_ID 
left outer join
    ST_PRODUCT_MANUFACTURER stprodman1_ 
        on this_.PRODUCT_ID=stprodman1_.PRODUCT_ID 
        and (
            stprodman1_.PROD_MAN_STATUS=? 
        ) 
left outer join
    ST_MANUFACTURER stman2_ 
        on stprodman1_.MAN_ID=stman2_.MAN_ID 
left outer join
    ST_PRODUCT_RATES zstpr5_ 
        on this_.PRODUCT_ID=zstpr5_.PRODUCT_ID 
        and (
            zstpr5_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 
        ) 
left outer join
    ST_PRODUCT_SUPPLIER stprodsup3_ 
        on this_.PRODUCT_ID=stprodsup3_.PRODUCT_ID 
        and (
            stprodsup3_.PROD_SUPPLIER_STATUS=? 
        ) 
left outer join
    ST_SUPPLIER stsup4_ 
        on stprodsup3_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 
inner join
    ST_TAX_MASTER tax7_ 
        on this_.TAX_ID=tax7_.TAX_ID 
inner join
    ST_UNIT unit8_ 
        on this_.UNIT_ID=unit8_.UNIT_ID 
where
    (
        this_.PRODUCT_DELETED <> 'DELETED'
    ) 
    and this_.PRODUCT_STATUS=?

zstpr5_ 在 stsup4_
之前生成 因此 zstpr5_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 无法访问

 left outer join
    ST_PRODUCT_RATES zstpr5_ 
        on this_.PRODUCT_ID=zstpr5_.PRODUCT_ID 
        and (
            zstpr5_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 
        ) 
left outer join
    ST_PRODUCT_SUPPLIER stprodsup3_ 
        on this_.PRODUCT_ID=stprodsup3_.PRODUCT_ID 
        and (
            stprodsup3_.PROD_SUPPLIER_STATUS=? 
        ) 
left outer join
    ST_SUPPLIER stsup4_ 
        on stprodsup3_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 

实际预期订单是

left outer join
    ST_PRODUCT_SUPPLIER stprodsup3_ 
        on this_.PRODUCT_ID=stprodsup3_.PRODUCT_ID 
        and (
            stprodsup3_.PROD_SUPPLIER_STATUS=? 
        ) 
left outer join
    ST_SUPPLIER stsup4_ 
        on stprodsup3_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 
left outer join
    ST_PRODUCT_RATES zstpr5_ 
        on this_.PRODUCT_ID=zstpr5_.PRODUCT_ID 
        and (
            zstpr5_.SUPPLIER_ID=stsup4_.SUPPLIER_ID 
        ) 

Hibernate 正在生成一个带有表名的数字， 1_, 2_, 3_

即使在创建 SQL 时不维护此顺序， 它甚至不是按照我们给出的顺序创建的。

Answer 1

由于您尚未发布映射文件，我将解释 Hibernate 如何对连接进行排序。

Hibernate 使用映射 xml 文件来确定连接的顺序，因此如果您在该表中有关系(一对多或任何其他标记)，只需将其移动到另一个表的标记之上。

您可以阅读更多相关信息 here .