使用休眠批量更新行

Question

我正在使用休眠4.3.10。根据hibernate文档（13.4），应该支持DML样式更新。任何人都可以指出我做错了什么？我有以下代码：

Session session = CurrentJobContextUtil.getCurrentContext().getSession(); 
Query query = session.createQuery("update Survey s set s.state = :newState where s.endDate < :time and s.state != :newState"); 
query.setParameter("newState",newState); 
query.setDate("time", time); 
int count = (int)query.uniqueResult(); 

我得到异常：

org.hibernate.hql.internal.QueryExecutionRequestException: Not supported for DML operations [update com.customerconnect.jobmanager.data.model.Survey s set s.state = :newState where s.endDate < :time] 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.errorIfDML(QueryTranslatorImpl.java:318) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:369) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:236) 
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1300) 
    at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103) 
    at org.hibernate.internal.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:966) 
    at com.customerconnect.jobmanager.data.dao.SurveyDAOImpl.updateSurveyState(SurveyDAOImpl.java:26) 
    at com.customerconnect.jobmanager.CCJobDataSvc.expireSurveys(CCJobDataSvc.java:510) 
    at com.customerconnect.jobmanager.jobs.SurveyJobs.expireSurveys(SurveyJobs.java:30) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
    at java.lang.reflect.Method.invoke(Unknown Source) 
    at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65) 
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) 
    at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) 
    at java.util.concurrent.FutureTask.run(Unknown Source) 
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source) 
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 

Answer 1

变化(int)query.uniqueResult()到query.executeUpdate();它会返回受影响的行数。