简单的hibernate Query不可滚动

时间：2015-08-07 06:13:32

标签： java hibernate

我试图为hibernate查询设置滚动。不幸的是我一直得到SQL异常。如果我使用相同的查询字符串而不滚动一切正常。

这很好用：

String query = "from Art";
List<Art> arts = entityManager.createQuery(query).getResultList();

这与SQLException失败：

String query = "from Art";
Session session = (Session) entityManager.getDelegate();
StatelessSession statelessSession = session.getSessionFactory().openStatelessSession();
org.hibernate.Query q = statelessSession.createQuery(query);
q.setReadOnly(true);
// MIN_VALUE gives hint to JDBC driver to stream results
q.setFetchSize(Integer.MIN_VALUE);
ScrollableResults sr = q.scroll(ScrollMode.FORWARD_ONLY);

为什么这个简单的查询无法滚动的任何想法？

异常堆栈跟踪：

11036 07 Aug 2015 08:09:49 SqlExceptionHelper DEBUG 188575 kb - could not execute query using scroll [select art0_.phar as phar1_1_, art0_.arttyp as arttyp2_1_, art0_.bagdossier as bagdossi3_1_, art0_.bagno as bagno4_1_, art0_.bagsl as bagsl5_1_, art0_.bagslc as bagslc6_1_, art0_.bg as bg7_1_, art0_.biocid as biocid8_1_, art0_.cdbg as cdbg9_1_, art0_.cdso1 as cdso10_1_, art0_.cdso2 as cdso11_1_, art0_.ce as ce12_1_, art0_.clincd as clincd13_1_, art0_.cool as cool14_1_, art0_.del as del15_1_, art0_.depcd as depcd16_1_, art0_.depot as depot17_1_, art0_.dscrd as dscrd18_1_, art0_.dscrf as dscrf19_1_, art0_.dscrlongd as dscrlon20_1_, art0_.dscrlongf as dscrlon21_1_, art0_.dscrpackd as dscrpac22_1_, art0_.dscrpackf as dscrpac23_1_, art0_.dt as dt24_1_, art0_.esist as esist25_1_, art0_.exp as exp26_1_, art0_.ggl as ggl27_1_, art0_.grdfr as grdfr28_1_, art0_.grpcd as grpcd29_1_, art0_.hospcd as hospcd30_1_, art0_.hscd as hscd31_1_, art0_.img as img32_1_, art0_.img2 as img33_1_, art0_.inslim as inslim34_1_, art0_.light as light35_1_, art0_.limpts as limpts36_1_, art0_.loacd as loacd37_1_, art0_.mini as mini38_1_, art0_.mult as mult39_1_, art0_.nopcs as nopcs40_1_, art0_.noti as noti41_1_, art0_.outsal as outsal42_1_, art0_.pcktypd as pcktypd43_1_, art0_.pcktypf as pcktypf44_1_, art0_.PHARNUM as PHARNUM45_1_, art0_.pdat as pdat46_1_, art0_.ptyp as ptyp47_1_, art0_.PRDNO as PRDNO48_1_, art0_.prdno as prdno48_1_, art0_.qty as qty49_1_, art0_.qtyud as qtyud50_1_, art0_.qtyuf as qtyuf51_1_, art0_.RESULT_ID as RESULT_70_1_, art0_.salecd as salecd52_1_, art0_.sist as sist53_1_, art0_.depth as depth54_1_, art0_.height as height55_1_, art0_.width as width56_1_, art0_.sloplus as sloplus57_1_, art0_.smcat as smcat58_1_, art0_.smcdat as smcdat59_1_, art0_.smdat as smdat60_1_, art0_.smno as smno61_1_, art0_.sortd as sortd62_1_, art0_.sortf as sortf63_1_, art0_.sttox as sttox64_1_, art0_.syn1D as syn65_1_, art0_.syn1F as syn66_1_, art0_.temp as temp67_1_, art0_.tradeable as tradeab68_1_, art0_.vat as vat69_1_ from ART art0_]
java.sql.SQLException: Invalid argument in JDBC call
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCUtil.outOfRangeArgument(Unknown Source)
    at org.hsqldb.jdbc.JDBCPreparedStatement.setFetchSize(Unknown Source)
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1912)
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1862)
    at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1839)
    at org.hibernate.loader.Loader.scroll(Loader.java:2627)
    at org.hibernate.loader.hql.QueryLoader.scroll(QueryLoader.java:561)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.scroll(QueryTranslatorImpl.java:439)
    at org.hibernate.engine.query.spi.HQLQueryPlan.performScroll(HQLQueryPlan.java:355)
    at org.hibernate.internal.StatelessSessionImpl.scroll(StatelessSessionImpl.java:763)
    at org.hibernate.internal.QueryImpl.scroll(QueryImpl.java:91)
    at com.xxx.search.importer.search.logindex.persistence.DefaultLogIndexService.openScrollableResult(DefaultLogIndexService.java:140)
    at com.xxx.search.importer.search.logindex.persistence.DefaultLogIndexService$$FastClassBySpringCGLIB$$15d41451.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:629)
    at com.xxx.search.importer.search.logindex.persistence.DefaultLogIndexService$$EnhancerBySpringCGLIB$$7e6bb957.openScrollableResult(<generated>)
    at com.xxx.search.importer.search.logindex.persistence.DefaultLogIndexServiceTest.thatScrollableResultSetWorks(DefaultLogIndexServiceTest.java:77)
    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:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.hsqldb.HsqlException: Invalid argument in JDBC call
    at org.hsqldb.error.Error.error(Unknown Source)
    at org.hsqldb.error.Error.error(Unknown Source)
    ... 47 more

1 个答案:

答案 0 :(得分：1)

如堆栈跟踪所示，您的JDBC驱动程序不接受Integer.MIN_VALUE作为提取大小。它超出了范围：

org.hsqldb.jdbc.JDBCUtil.outOfRangeArgument(Unknown Source)
at org.hsqldb.jdbc.JDBCPreparedStatement.setFetchSize(Unknown Source)

您不需要指定获取大小。这个AFAIK只对MySQL有用，它使用这个hack来阻止它加载内存中的所有东西。体面的数据库不需要那种黑客攻击。

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