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非唯一发现SqlAlias异常：在自动发现本机 sql 查询期间遇到重复的 sql 别名 [ASC_ID]

java mysql sql hibernate jpa
2022-09-01 11:44:11

我有三个表，和 - 其外观如下：CREDENTIAL_USERCREDENTIAL_EXPIRATIONASC_DETAILS

CREDENTIAL_USER { ASC_ID, name, ITEM}和CREDENTIAL_USER { MONTH, YEAR, ASC_ID}ASC_DETAILS {ASCID, NAME, ROLE}.

我执行了一个简单的本机 SQL 联接，以仅选择CREDENTIAL_USER。ASC_ID和ASC_DETAAILS。ASCID as ：

Query query = entityManager.createNativeQuery("SELECT ad.ASCID,ad.NAME,ad.CRED_EMPLOYEE_FNAME,ad.CRED_EMPLOYEE_LNAME,ad.CRED_EMPLOYEE_EMAIL,ad.CRED_EMPLOYEE_REMINDER,"+
                              " cu.*, ce.*, cl.* FROM ASC_DETAILS ad,CREDENTIAL_USER cu, CREDENTIAL_EXPIRATION ce, CREDENTIAL_LICENSE cl WHERE"+ 
                              " cu.IS_CRD_EMPLOYEE = true AND cl.IS_EMPLOYEE = true AND  ce.LICENSE_ID = cl.LICENSE_ID  AND cu.ASC_ID=ad.ASCID"+ 
                              " AND ce.LICENSE_EXP_YR >= "+year+" AND (ce.IS_LICENSE_YES=1 OR ce.IS_LICENSE_YES=3) AND cu.ASC_ID=ce.ASC_ID AND"+
                              " cu.ID=ce.EMPLOYEE_ID");
             List<Object[]> list = query.getResultList();

它在本地运行良好，但得到org.hibernate.loader.custom.NonUniqueDiscoveredSqlAliasException: Encountered a duplicated sql alias [ASC_ID] during auto-discovery of a native-sql query

服务器上的异常JBoss

堆栈跟踪 ：

23:30:00,300 ERROR [stderr] (pool-10-thread-1) javax.persistence.PersistenceException: org.hibernate.loader.custom.NonUniqueDiscoveredSqlAliasException: Encountered a duplicated sql alias [ASC_ID] during auto-discovery of a native-sql query
23:30:00,301 ERROR [stderr] (pool-10-thread-1)  at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361)
23:30:00,302 ERROR [stderr] (pool-10-thread-1)  at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289)
23:30:00,303 ERROR [stderr] (pool-10-thread-1)  at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:261)
23:30:00,303 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
23:30:00,304 ERROR [stderr] (pool-10-thread-1)  at  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
23:30:00,304 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
23:30:00,305 ERROR [stderr] (pool-10-thread-1)  at java.lang.reflect.Method.invoke(Method.java:616)
23:30:00,305 ERROR [stderr] (pool-10-thread-1)  at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:310)
23:30:00,306 ERROR [stderr] (pool-10-thread-1)  at sun.proxy.$Proxy42.getResultList(Unknown Source)
 23:30:00,307 ERROR [stderr] (pool-10-thread-1)  at com.asc.dao.UserDAO.getPendingNotificationCredEmployee(UserDAO.java:991)
23:30:00,307 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
23:30:00,308 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
23:30:00,308 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
23:30:00,309 ERROR [stderr] (pool-10-thread-1)  at java.lang.reflect.Method.invoke(Method.java:616)
23:30:00,309 ERROR [stderr] (pool-10-thread-1)  at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
23:30:00,310 ERROR [stderr] (pool-10-thread-1)  at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:196)
23:30:00,311 ERROR [stderr] (pool-10-thread-1)  at sun.proxy.$Proxy34.getPendingNotificationCredEmployee(Unknown Source)
23:30:00,311 ERROR [stderr] (pool-10-thread-1)  at com.asc.service.UserService.getPendingNotificationCredEmployee(UserService.java:2661)
23:30:00,312 ERROR [stderr] (pool-10-thread-1)  at com.asc.service.UserService$$FastClassByCGLIB$$de8fbe27.invoke(<generated>)
23:30:00,312 ERROR [stderr] (pool-10-thread-1)  at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
23:30:00,313 ERROR [stderr] (pool-10-thread-1)  at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:617)
23:30:00,314 ERROR [stderr] (pool-10-thread-1)  at com.asc.service.UserService$$EnhancerByCGLIB$$d2e7fa8d.getPendingNotificationCredEmployee(<generated>)
23:30:00,314 ERROR [stderr] (pool-10-thread-1)  at com.asc.service.ExpirationNotificationService.sendAlertToAdmin(ExpirationNotificationService.java:47)
23:30:00,315 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
23:30:00,316 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
23:30:00,316 ERROR [stderr] (pool-10-thread-1)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
23:30:00,317 ERROR [stderr] (pool-10-thread-1)  at java.lang.reflect.Method.invoke(Method.java:616)
23:30:00,317 ERROR [stderr] (pool-10-thread-1)  at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273)
23:30:00,318 ERROR [stderr] (pool-10-thread-1)  at org.springframework.scheduling.support.MethodInvokingRunnable.run(MethodInvokingRunnable.java:65)
23:30:00,318 ERROR [stderr] (pool-10-thread-1)  at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51)
23:30:00,319 ERROR [stderr] (pool-10-thread-1)  at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
23:30:00,320 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
23:30:00,320 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
23:30:00,321 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.FutureTask.run(FutureTask.java:166)
23:30:00,321 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165)
23:30:00,322 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266)
23:30:00,323 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
23:30:00,323 ERROR [stderr] (pool-10-thread-1)  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
23:30:00,324 ERROR [stderr] (pool-10-thread-1)  at java.lang.Thread.run(Thread.java:679)
23:30:00,325 ERROR [stderr] (pool-10-thread-1) Caused by: org.hibernate.loader.custom.NonUniqueDiscoveredSqlAliasException: Encountered a duplicated sql alias [ASC_ID] during auto-discovery of a native-sql query
23:30:00,326 ERROR [stderr] (pool-10-thread-1)  at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:594)

答案 1

CREDENTIAL_USER { ASC_ID、 name、 ITEM}、CREDENTIAL_USER { MONTH、 YEAR ASC_ID} 都包含ASC_ID因此ASC_ID在选择查询中变得不明确。明智地选择数据列，并为每列提供单独的别名


答案 2

第一次使用coleasece时，我也遇到了这个问题。我通过写以下内容解决了这个问题：

...
coalesce(column_name, 'default_value') as key_word,
...

在我的查询中。

仅添加合并（column_name，“default_value”），将创建几个带有别名的值，并发生此错误。coalesce


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