如何使用JPA調用firebird可選擇的存儲過程？

Question

我想使用JPA調用Firebird可選過程。該方法是這樣的：

java.lang.IllegalArgumentException: Named query not found: select a.dol as id, a.out$error_code as error_code from P_TDA_ADD_LINE_TO_BROKER_REP (:IN$DOC,:IN$SHARE, :IN$B_ACC, :IN$S_ACC, :IN$COMMENT) a

at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:665) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:344) at com.sun.proxy.$Proxy33.createNamedQuery(Unknown Source) at com.comp.app.TradesUpload.TradesUpload.addLineToBrokerReport(TradesUpload.java:454) at com.comp.app.TradesUpload.TradesUploadTest.addLineToBrokerReport(TradesUploadTest.java:69) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

• 是否可以調用使用JPA火鳥選擇程序：

  public void addLineToBrokerReport(Map<String, Object> parametersForAddDealsProc) { 
  
       MapUtils.debugPrint(System.out, "Parameters for procedure", parametersForAddDealsProc); 
  
       String q = "select a.dol as id, a.out$error_code as error_code " + 
        "from ADD_LINE (:IN$DOC," + 
        ":IN$SHARE, " + 
        ":IN$B_ACC, " + 
        ":IN$S_ACC, " + 
        ":IN$COMMENT) a"; 
  
       Query query = em.createNamedQuery(q, CallProcedureResult.class); 
       for (Map.Entry<String, Object> entry : parametersForAddDealsProc.entrySet()) { 
        query.setParameter("\"" + entry.getKey()+ "\"", entry.getValue()); 
       } 
       CallProcedureResult result = (CallProcedureResult) query.getSingleResult(); 
       LOG.info("Error_code = " + result.getError_code() + " dol = " + result.getId()); 
  
      } 
  

  調用它返回一個錯誤後？

• 爲什麼如果在方法中存在Query query = em.createNamedQuery(q, CallProcedureResult.class);，那麼「命名查詢未找到」？

Answer 1

em.createNamedQuery第一個參數應該是NamedQuery（不是JPQL）的名稱。您將在註釋或XML中定義的NamedQuery本身，並根據它指定NAME。另外如果你的意思是直接調用SQL（而不是JPQL），你需要一個NamedNativeQuery這是一個本地查詢。

JPA 2.1支持存儲過程;是否可以調用火鳥的東西我不知道，但你也可以嘗試它

Answer 2

Is it possible to call firebird select procedure using JPA?

是的。您可以改用EntityManager#createNativeQuery。

Why "Named query not found" if there is Query query = em.createNamedQuery(q, CallProcedureResult.class); in method?

的EntityManager#createNamedQuery第一個參數必須是一個NamedQuery，它不是，它是在你的情況下，實際的查詢。

無關到您的問題，使用本機查詢中的命名參數是由Hibernate支持，但它不能在跨JPA實現（https://stackoverflow.com/a/28829942/5078385）可移植使用。