Spring Data JPA NamedStoredProcedureQuery Multiple Out参数 [英] Spring Data JPA NamedStoredProcedureQuery Multiple Out Parameters

问题描述

我有一个简单的存储过程，用于测试Spring Data JPA存储过程功能.

I have a simple stored procedure I'm using to test out Spring Data JPA Stored Procedure feature.

create or replace procedure plus1inout (arg in int,res1 out int,res2 out int) is
BEGIN   
 res1 := arg + 1; 
 res2 := res1 + 1;
END;

我的代码是:

@Repository
public interface AdjudConverDateSPRepository extends JpaRepository<AdjudConverDateSP, Long> {
    @Procedure(name = "plus1")
    Object[] plus1(@Param("arg") Integer arg);
}

@Entity
@NamedStoredProcedureQuery(name = "plus1", procedureName = "ADJUD.PLUS1INOUT",
        parameters = {
        @StoredProcedureParameter(mode = ParameterMode.IN, name = "arg", type = Integer.class),
        @StoredProcedureParameter(mode = ParameterMode.OUT, name = "res1", type = Integer.class),
        @StoredProcedureParameter(mode = ParameterMode.OUT, name = "res2", type = Integer.class)
})
public class AdjudConverDateSP implements Serializable {
        //stub to satisfy hibernate identifier requirement
        @Id @GeneratedValue
        private Long id;

}

当我只有一个OUT参数时，一切正常.但是一旦添加了第二个OUT参数，我就会收到一条异常消息，说它无法在实体中找到该过程.

Everything works fine when I have a single OUT parameter. But once I add a second OUT parameter I get an exception saying it can't find the procedure in the entity.

Caused by:
  org.springframework.data.mapping.PropertyReferenceException: No property plus1 found for type AdjudConverDateSP!  at
  org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:75) at 
  org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:327) at
  org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:307) at
  org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:270) at
  org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:241) at
  org.springframework.data.repository.query.parser.Part.<init>(Part.java:76) at
  org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:235) at
  org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:373) at
  org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:353)

推荐答案

看起来@Procedure期望只有一个OUT参数直接与方法返回类型绑定...

It looks like @Procedure expects only one OUT parameter which is binded directly to the method return type...

要处理多个OUT参数，可以直接使用JPA API:

To handle multiple OUT params you can use the JPA API directly:

StoredProcedureQuery proc = em.createNamedStoredProcedureQuery("plus1");

proc.setParameter("arg", 1);
proc.execute();
Integer res1 = (Integer) proc.getOutputParameterValue("res1");
Integer res2 = (Integer) proc.getOutputParameterValue("res2");
...

这篇关于Spring Data JPA NamedStoredProcedureQuery Multiple Out参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！