hibernate sql怎么使用别名
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发布时间：2022-04-07 18:05
共1个回答
热心网友
时间：2022-04-07 19:34
问题描述：项目是从一个sqlserver 数据库翻转到mysql数据库上的。通过sql查询，自动映射到对象上，但是总是报错。奇怪的问题：sql打印出来放到数据库客户端上
可以正常执行结果。但是sql就是查询不出来，报 Column 'account' not found. 这样的错。换过驱动，想过框架的调用方式，查询资料的时候，发现有人
说用query.addEntity("","").list() 可以解决问题，未做验证。因为不想花大力气从框架上变动。用驱动源码跟踪，发现原来，驱动根本就不识别别名。在查询
`userAccount`对应的值的时候，传到驱动的columnName 竟然是 “account”，这也是很多人在网上说的，如果sqlQuey 遇到两个表有同一个属性名，查询会
报错的bug的原因所在！
代码部分：
[java] view plain copy
SQLQuery query = createSQLQuery(orderSql, values);
long totalCount = countSqlResult(sql, values);
page.setTotalItems(totalCount);
setPageParameterToSqlQuery(query, page);
List result = query.setResultTransformer(Transformers.aliasToBean(cl)).list();
page.setResult(result);
平台输出：
[sql] view plain copy
select
l.id,
userId,
u.account as `userAccount`,
ip,
ipAddr,
loginTime
from
t_loginlog l
left join
t_user u
on l.userId = u.id
where
1=1 limit ?
[java] view plain copy
[2015-01-30 14:27:29,031][ERROR][http-8080-1] (JDBCExceptionReporter.java:234) - Column 'account' not found.
2015-1-30 14:27:29 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet ishare threw exception
java.sql.SQLException: Column 'account' not found.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)
at com.mysql.jdbc.ResultSetImpl.findColumn(ResultSetImpl.java:1171)
at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5737)
at org.apache.commons.dbcp.DelegatingResultSet.getString(DelegatingResultSet.java:263)
at org.apache.commons.dbcp.DelegatingResultSet.getString(DelegatingResultSet.java:263)
at org.hibernate.type.descriptor.sql.VarcharTypeDescriptor$2.doExtract(VarcharTypeDescriptor.java:61)
at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:64)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:253)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:249)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:234)
at org.hibernate.loader.custom.CustomLoader$ScalarResultColumnProcessor.extract(CustomLoader.java:505)
at org.hibernate.loader.custom.CustomLoader$ResultRowProcessor.buildResultRow(CustomLoader.java:451)
at org.hibernate.loader.custom.CustomLoader.getResultColumnOrRow(CustomLoader.java:348)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:639)
at org.hibernate.loader.Loader.doQuery(Loader.java:829)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
at org.hibernate.loader.Loader.doList(Loader.java:2533)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276)
at org.hibernate.loader.Loader.list(Loader.java:2271)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:316)
at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1842)
at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:165)
at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:157)
at com.coolsoul.framework.orm.hibernate.HibernateDao.findSqlPage(HibernateDao.java:90)
at com.coolsoul.ishare.loginLog.service.LoginLogService.findPageList(LoginLogService.java:54)
at com.coolsoul.ishare.loginLog.service.LoginLogService
FastClassByCGLIB
fb9ca761.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
at com.coolsoul.ishare.loginLog.service.LoginLogService
EnhancerByCGLIB
5ea6d36b.findPageList(<generated>)
at com.coolsoul.ishare.loginLog.controller.LoginLogController.queryList(LoginLogController.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
解救方法：
困扰了我很久 ，找了很多资料，问题很简单，就是驱动不支持别名的问题，这里记录下，为后来人造桥！！！ 在连接mysql数据库的时候添加 useOldAliasMetadataBehavior=true 这个参数！！！！
