Question

我尝试在reference manunal之后使用Hibernate HQL查询执行批量删除，但是我收到了查询语法错误。这一行

final Query qry = getSession(false).createQuery(" delete from NewCalendarDay");

导致异常：

org.hibernate.QueryException：查询必须以SELECT或FROM开头：delete [从pl.com.bms.avaro.staticData.model.NewCalendarDay删除]

执行代码的类扩展org.springframework.orm.hibernate3.support.HibernateDaoSupport，因此getSession()方法应返回org.hibernate.Session。我使用spring v.2.5.5和Hibernate v.3.2.6.ga

我应该配置哪些内容可以批量删除或者什么？

修改
Bozho要求完整的堆栈跟踪，所以在这里：

org.hibernate.QueryException: query must begin with SELECT or FROM: delete [ delete from pl.com.bms.avaro.staticData.model.NewCalendarDay ]
    at org.hibernate.hql.classic.ClauseParser.token(ClauseParser.java:83)
    at org.hibernate.hql.classic.PreprocessingParser.token(PreprocessingParser.java:108)
    at org.hibernate.hql.classic.ParserHelper.parse(ParserHelper.java:28)
    at org.hibernate.hql.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:216)
    at org.hibernate.hql.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:185)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56)
    at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72)
    at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
    at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
    at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623)
    at pl.com.bms.avaro.staticData.dao.implementations.NewCalendarDayDaoImpl.deleteCalendarDaysForYear(NewCalendarDayDaoImpl.java:41)
    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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at $Proxy43.deleteCalendarDaysForYear(Unknown Source)
    at pl.com.bms.avaro.staticData.dao.tests.TestCalendarDayDaoImpl.testFindByDateCal(TestCalendarDayDaoImpl.java:60)
    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 junit.framework.TestCase.runTest(TestCase.java:168)
    at junit.framework.TestCase.runBare(TestCase.java:134)
    at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:76)
    at junit.framework.TestResult$1.protect(TestResult.java:110)
    at junit.framework.TestResult.runProtected(TestResult.java:128)
    at junit.framework.TestResult.run(TestResult.java:113)
    at junit.framework.TestCase.run(TestCase.java:124)
    at junit.framework.TestSuite.runTest(TestSuite.java:232)
    at junit.framework.TestSuite.run(TestSuite.java:227)
    at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:91)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Answer 1

开始摆脱领先的空白。然后使用query.executeUpdate()

执行查询

然后，即使这对您有用，我也不建议使用HQL删除实体。如果他们有任何关系，这些将不会被级联，你最终会出现不一致。

选择所有对象并在每个对象上调用session.remove(entity)。当然，如果你没有任何x-to-x关系，你可以继续使用HQL，但如果你将来添加它，请小心。

更新：您可能在hibernate配置中遇到类似内容：

<prop
 key="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory
</prop>

它使Hibernate使用经典解析器。删除它，然后再试一次。

Answer 2

我有同样的错误并评论此属性 org.hibernate.hql.internal.classic.ClassicQueryTranslatorFactory＆LT; /属性 - ＆GT;

解决了这个问题。

在Hibernate中批量删除时查询语法错误

2 个答案: