java - JPA 查询问题

Question

我正在尝试执行以下 JPA 查询:

    public static final String UPDATE_INVENTORY_CUSTOMER_FOR_AMS_MAPPING = "UPDATE Inventory inventory SET" 
    + " inventory.customer.id = :" + DataAccessConstants.PARAM_CUSTOMER_ID
    + " ,inventory.lastUpdateUserId = :" + DataAccessConstants.PARAM_USER_ID
    + " where inventory.amsConsignorName = :" + DataAccessConstants.PARAM_AMS_CONSIGNOR_NAME
    + " and inventory.amsConsignorOrgCd = :" + DataAccessConstants.PARAM_AMS_CONSIGNOR_ORG_CD
    + " and inventory.amsConsignorTypeName = :" + DataAccessConstants.PARAM_AMS_CONSIGNOR_TYPE
    + " and inventory.status.code in (:" + DataAccessConstants.PARAM_STATUS + ")";  

但它看到以下内容:

update ATL_INVENTORY,  set CONSIGNOR_ID=?, LAST_UPDATE_USER_ID=? where AMS_CONSIGNOR_NAME=? and AMS_CONSIGNOR_ORG_CD=? and AMS_CONSIGNOR_TYPE_NAME=? and (CODE in (? , ? , ? , ?))

关于表名后面为什么有逗号的任何想法？

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解决方案

我必须将原始查询更改为以下内容:

update Inventory inv set " 
    + "inv.customer.id = :" + DataAccessConstants.PARAM_CUSTOMER_ID + " "
    + "where inv.amsConsignorName =:" + DataAccessConstants.PARAM_AMS_CONSIGNOR_NAME + " "
    + "and inv.amsConsignorOrgCd =:" + DataAccessConstants.PARAM_AMS_CONSIGNOR_ORG_CD + " "
    + "and inv.amsConsignorTypeName =:" + DataAccessConstants.PARAM_AMS_CONSIGNOR_TYPE + " "
    + "and exists(select 1 from Code code where inv.status = code and code.code in (:" + DataAccessConstants.PARAM_STATUS + "))

然后产生了这个:

update ATL_INVENTORY set CONSIGNOR_ID=? where AMS_CONSIGNOR_NAME=? and AMS_CONSIGNOR_ORG_CD=? and AMS_CONSIGNOR_TYPE_NAME=? and (exists (select 1 from ATL_CODE code1_ where ATL_INVENTORY.STATUS=CODE_ID and (code1_.CODE in (? , ? , ? , ?))))

基于此处的说明:Incorrect SQL generated for JPA QL Update statement involving multiple entities

Answer 1

您的查询代码为 UPDATE Inventory inventory SET，但生成的 SQL 显示为 update ATL_INVENTORY, set。为什么文字 SQL 字符串不是您编码的内容？当我遇到这样的谜团时，通常是由于假设正在做一件事而实际上正在做另一件事。

这表明您编写的 SQL 并未按照您假设的方式用于生成该 SQL。查看此查询可能来自何处。我敢打赌真正的来源中有一个错位的逗号。

您使用的是哪种 JPA 实现？如果我对一个错误的假设不正确，它表示实现中存在错误。你以前用过吗？ UPDATE 成功了吗？如果是，它肯定埋在您的代码库中的某个地方。

你有一个接口(interface)，里面有一堆常量。就个人而言，我不喜欢那样的设计。这是一个anti-pattern with a name .