Question

嗨我运行示例使用hibernate与postgresql 8.4，当我尝试添加它将显示以下错误

org.hibernate.exception.SQLGrammarException: could not insert: [com.claystone.db.OrWorkgroup]
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2267)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2660)
    at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
    at com.claystone.server.setup.VehicleManager.AddWorkGroup(VehicleManager.java:700)
    at com.claystone.server.setup.SetupServiceImpl.AddWorkGroup(SetupServiceImpl.java:1077)
    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 com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:324)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: org.postgresql.util.PSQLException: ERROR: column "last_modified_time" is of type last_modified_time but expression is of type bytea
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1548)
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1316)
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:191)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:351)
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:305)
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
    at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2247)
    ... 38 more

如何解决此错误。

Answer 1

列的类型不允许映射到列'last_modified_time'的属性（字段）的类型。要么更改列的类型，要么更改属性的类型（字段）。

Answer 2

检查$TOMCAT_HOME/conf/中的context.xml文件，如果多次声明，可能会发生数据源冲突。

您可以输入以下内容显示资源名称列表：

$ egrep -i 'Resource[[:space:]]+name' /var/lib/tomcat6/conf/context.xml | awk '{print $2}' | sed 's/name=//g' | sed 's/"//g'

事实上，您可能会在几个星期或几个月前在一个旧项目中工作，并为您提供相同的数据源名称。

其他可能的解释：你可能有一个jar库冲突（例如mysql-connector-java），所以检查$ TOMCAT_HOME / lib /并部署应用程序lib /子文件夹，如$ TOMCAT_HOME / webapps / YOUR_APPLICATION / WEB-INF / LIB /.

希望它有所帮助！

Pascal Ramboz（PERF IT公司）。

Answer 3

嗨，请检查cfg文件，如果'hbm2ddl.auto'中有'create'，请将其更改为'update';这可能是个问题

<property name="hbm2ddl.auto">update</property>

Answer 4

检查类@table（name =“”）上的注释，从现有的

更改表名

org.hibernate.exception.SQLGrammarException：无法插入：

4 个答案: