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fromDate和toDate
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。
3条答案
按热度按时间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。
使用
与至今相同
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:
可行的办法是:
你可以试着给你的变量应用正确的类型,看看是否能成功。
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。
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。