Java 如何映射来自JPA2.1中NamestoredProcess的非实体结果集?
我正在使用JPA2.1调用一个postgresql过程,并希望将结果集转换为一个名为StoreAndCategoryID的非实体类,该类包含两个名为:storeid,categoryid的整数字段。这两个字段是从过程返回的字段Java 如何映射来自JPA2.1中NamestoredProcess的非实体结果集?,java,postgresql,jpa,Java,Postgresql,Jpa,我正在使用JPA2.1调用一个postgresql过程,并希望将结果集转换为一个名为StoreAndCategoryID的非实体类,该类包含两个名为:storeid,categoryid的整数字段。这两个字段是从过程返回的字段 @NamedStoredProcedureQuery( name = "Category.func_getcategorybytextsearchid", procedureName = "func_getcategorybytextsearchid",
@NamedStoredProcedureQuery(
name = "Category.func_getcategorybytextsearchid",
procedureName = "func_getcategorybytextsearchid",
parameters = {@StoredProcedureParameter(name = "textsearchid", type = Integer.class,
mode = javax.persistence.ParameterMode.IN ),
@StoredProcedureParameter(name = "mycursor", type = void.class,
mode = ParameterMode.REF_CURSOR )}
)
下面的代码是在Postgresql上执行的过程
CREATE OR REPLACE FUNCTION func_getcategorybytextsearchid(textsearchid integer )
RETURNS refcursor AS
$BODY$
declare mycursor refcursor ;
BEGIN
mycursor = 'mycursor';
OPEN mycursor FOR (
select storeid, categoryid
from item_full_text_search
where itemfulltextsearchid = $1;
RETURN mycursor ;
end;
下面的java代码显示了如何调用该过程
StoredProcedureQuery q =
em.createNamedStoredProcedureQuery("Category.func_getcategorybytextsearchid");
q.setParameter("textsearchid", textsearchid);
if (q.execute())
{
//the result set needs to convert to StoreAndCategoryID class if possible.
StoreAndCategoryID storeAndCategoryID = q.getOutputParameterValue("mycursor");
}
public class StoreAndCategoryID
{
int storeid;
int categoryid;
}
如何更改@namedStoredProcedureRequesty以返回/转换非实体类StoreAndCategoryID
谢谢,您不能使用
storedProcedureRequesty
将存储过程结果集映射到非实体类。
但是,如果您要使用(如果您可以使用JPQL查询而不是存储过程调用)TypedQuey
您可以使用
或者在
NativeQuery
中,您可以使用@SqlResultSetMapping和@ConstructorResult来完成
@SqlResultSetMapping(name = "CalendarsMapping", classes = {
@ConstructorResult(targetClass = Calendar.class, columns = { @ColumnResult(name = "OutDate"),
@ColumnResult(name = "CategoryID", type = Long.class), @ColumnResult(name = "CategoryName"),
@ColumnResult(name = "DepositDate"), @ColumnResult(name = "EventDate"),
@ColumnResult(name = "EventType"), @ColumnResult(name = "Status"),
@ColumnResult(name = "Effective", type = String.class),
@ColumnResult(name = "Indicator", type = String.class), @ColumnResult(name = "TermDate"),
@ColumnResult(name = "TID"), @ColumnResult(name = "TName"), @ColumnResult(name = "Series"),
@ColumnResult(name = "Symbol"), @ColumnResult(name = "TType", type = String.class) }) })
StoredProcedureQuery procedureQuery = entityManager.createStoredProcedureQuery(
"GetDepAndTerm", "CalendarsMapping");
procedureQuery.getResultList();
我遵循了这一点,但仍然是运行时异常,未知实体。有什么想法吗?嗨,Gowthamirddy你找到解决办法了吗?