postgresql Postgres Sql '无法通过Hibernate'确定参数'的数据类型

zqdjd7g9  于 2023-02-08  发布在  PostgreSQL
关注(0)|答案(3)|浏览(274)

我有Jpa存储库

@Repository
public interface CardReaderRepository extends JpaRepository<CardReaderEntity, Integer > {

}

当我在这个存储库中执行查询时,如下所示:

@Query(
    value = "SELECT new ir.server.component.panel.response." +
            "InvalidCardReaderDataDigestResponse(" +
            "    cr.driverNumber, cr.exploiterCode, cr.lineCode, " +
            "    cr.transactionDate, cr.offLoadingDate, " +
            "    cr.cardReaderNumber, " +
            "    sum(cr.count) , sum(cr.remind) " +
            ") " +
            "FROM CardReaderEntity cr " +
            "WHERE cr.company.id = :companyId " +
            "AND cr.status.id in :statusIds " +
            "AND cr.deleted = false " +
            "AND  (:fromDate is null or cr.offLoadingDate >= :fromDate ) " +
            "AND  (:toDate   is null or cr.offLoadingDate <= :toDate   ) " +
            "group by cr.driverNumber, cr.exploiterCode, cr.lineCode, cr.transactionDate, cr.offLoadingDate, cr.cardReaderNumber"
)
Page<InvalidCardReaderDataDigestResponse> findAllInvalidCardReaderDataDigestByCompanyIdAndStatusIdIn(
        @Param( "companyId" )   int companyId,
        @Param( "fromDate" )    Date fromDate,
        @Param( "toDate" )      Date toDate,
        @Param( "statusIds" )   List<Integer> statusIds,
        Pageable pageable
);

错误为:

org.postgresql.util.PSQLException: ERROR: could not determine data type of parameter $3
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2433) ~[postgresql-42.2.2.jar:42.2.2]
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2178) ~[postgresql-42.2.2.jar:42.2.2]
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:306) ~[postgresql-42.2.2.jar:42.2.2]

但当查询更改为:

@Query(
    value = "SELECT new ir.server.component.panel.response." +
            "InvalidCardReaderDataDigestResponse(" +
            "    cr.driverNumber, cr.exploiterCode, cr.lineCode, " +
            "    cr.transactionDate, cr.offLoadingDate, " +
            "    cr.cardReaderNumber, " +
            "    sum(cr.count) , sum(cr.remind) " +
            ") " +
            "FROM CardReaderEntity cr " +
            "WHERE cr.company.id = :companyId " +
            "AND cr.status.id in :statusIds " +
            "AND cr.deleted = false " +
            "AND  (:fromDate is null ) " +
            "AND  (:toDate   is null ) " +
            "group by cr.driverNumber, cr.exploiterCode, cr.lineCode, cr.transactionDate, cr.offLoadingDate, cr.cardReaderNumber"
)
Page<InvalidCardReaderDataDigestResponse> findAllInvalidCardReaderDataDigestByCompanyIdAndStatusIdIn(
        @Param( "companyId" )   int companyId,
        @Param( "fromDate" )    Date fromDate,
        @Param( "toDate" )      Date toDate,
        @Param( "statusIds" )   List<Integer> statusIds,
        Pageable pageable
);

此工作没有错误,但希望运行fromDatetoDate
注:

    • 读卡器实体中的关闭加载日期**:
@Basic
@Temporal( TemporalType.TIMESTAMP )
public Date getOffLoadingDate() {
    return offLoadingDate;
}
public void setOffLoadingDate(Date offLoadingDate) {
    this.offLoadingDate = offLoadingDate;
}

我的java文件中的所有日期导入都是java.util.Date

uqxowvwt

uqxowvwt1#

PostgreSQL驱动程序试图找出参数的类型,以便将这些参数直接告知PostgreSQL服务器。这是PostgreSQL服务器能够比较字段所必需的。在java.sql.Timestamp的情况下,PostgreSQL驱动程序无法执行此操作,因为PostgreSQL有两个匹配的字段。一方面,有时间戳,另一边是带时区信息的timestamptz,结果是,PostgreSQL驱动程序只会将其与Oid. UNSPECIFIED匹配。由于PostgreSQL服务器能够检测到类型,因此大多数情况下此行为不是问题。在PostgreSQL驱动程序类PgPreparedStatement中有此问题的详细描述。
因此,只有当Postgres无法检测到正确的类型时(当您检查null时),您才可以强制转换为timestamp/date类型。

(:fromDate is null )

使用

(cast(:fromDate as date) is null )

与至今相同

2eafrhcq

2eafrhcq2#

根据我的经验,在让PostgreSQL检查外部值是否为null之前,必须为外部值指定一个类型。例如,下面的代码对PostgreSQL不起作用:

SELECT * FROM table WHERE $1 IS NULL OR column = $1;

可行的办法是:

SELECT * FROM table WHERE $1::text IS NULL OR column = $1::text;

你可以试着给你的变量应用正确的类型,看看是否能成功。

@Query(
    value = "SELECT new ir.server.component.panel.response." +
            "InvalidCardReaderDataDigestResponse(" +
            "    cr.driverNumber, cr.exploiterCode, cr.lineCode, " +
            "    cr.transactionDate, cr.offLoadingDate, " +
            "    cr.cardReaderNumber, " +
            "    sum(cr.count) , sum(cr.remind) " +
            ") " +
            "FROM CardReaderEntity cr " +
            "WHERE cr.company.id = :companyId " +
            "AND cr.status.id in :statusIds " +
            "AND cr.deleted = false " +
            "AND  (:fromDate::timestamp is null or cr.offLoadingDate >= :fromDate::timestamp ) " +
            "AND  (:toDate::timestamp   is null or cr.offLoadingDate <= :toDate::timestamp   ) " +
            "group by cr.driverNumber, cr.exploiterCode, cr.lineCode, cr.transactionDate, cr.offLoadingDate, cr.cardReaderNumber"
)

事实上,PostgreSQL在大多数情况下不会要求类型,检查空值是需要类型的特殊情况之一。

5q4ezhmt

5q4ezhmt3#

仅在与null进行比较时添加强制转换,而不在实际数据比较时添加。

@Query(
    value = "SELECT new ir.server.component.panel.response." +
            "InvalidCardReaderDataDigestResponse(" +
            "    cr.driverNumber, cr.exploiterCode, cr.lineCode, " +
            "    cr.transactionDate, cr.offLoadingDate, " +
            "    cr.cardReaderNumber, " +
            "    sum(cr.count) , sum(cr.remind) " +
            ") " +
            "FROM CardReaderEntity cr " +
            "WHERE cr.company.id = :companyId " +
            "AND cr.status.id in :statusIds " +
            "AND cr.deleted = false " +
            "AND  (cast(:fromDate as timestamp) is null or cr.offLoadingDate >= :fromDate ) " +
            "AND  (cast(:toDate as timestamp)   is null or cr.offLoadingDate <= :toDate   ) " +
            "group by cr.driverNumber, cr.exploiterCode, cr.lineCode, cr.transactionDate, cr.offLoadingDate, cr.cardReaderNumber"
)
Page<InvalidCardReaderDataDigestResponse> findAllInvalidCardReaderDataDigestByCompanyIdAndStatusIdIn(
        @Param( "companyId" )   int companyId,
        @Param( "fromDate" )    Date fromDate,
        @Param( "toDate" )      Date toDate,
        @Param( "statusIds" )   List<Integer> statusIds,
        Pageable pageable
);

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