应用错误收集

我们可以根据特定条件在按需查询中编写更新语句吗？我正在尝试执行以下查询：更新istream StockEventWindow set price = 100 where price＆gt; 250和id = 10;

但是我得到了以下错误执行语句时出错：select子句表达式类型的null或零元素列表无效[update istream StockEventWindow set price = 100其中price＆gt; 250和id = 10]

我的任务是在收到时间事件后的某个时间间隔内更新价格大于250的事件。

如果有人通过按需使用更新查询的示例提供解决方案，那将会很棒。如果可能，请在按需查询中提供删除命令用法的示例。

我尝试按需更新和删除命令，如esper文档6.10.2和6.10.3（Link）中所述。但这是错误的。

使用删除时出现以下错误： `com.espertech.esper.client.EPStatementSyntaxException：'delete'附近的语法不正确（保留关键字）[从StockEventWindow删除，其中id = 10] at com.espertech.esper.epl.parse.ExceptionConvertor.convertStatement（ExceptionConvertor.java:40）在com.espertech.esper.epl.parse.ParseHelper.parse（ParseHelper.java:121）在com.espertech.esper.core.service.EPAdministratorHelper.compileEPL(EPAdministratorHelper.java:115）在com.espertech.esper.core.service.EPAdministratorHelper.compileEPL（EPAdministratorHelper.java:88）在com.espertech.esper.core.service.EPRuntimeImpl.getExecuteMethod（EPRuntimeImpl.java:1456）在com.espertech.esper.core.service.EPRuntimeImpl.executeQueryInternal（EPRuntimeImpl.java:1414）在com.espertech.esper.core.service.EPRuntimeImpl.executeQuery（EPRuntimeImpl.java:1407）在com.cor.cep.handler.Listener.onDemandUpdate（Listener.java:155） at com.cor.cep.handler.Listener.update（Listener.java:76） at com.espertech.esper.core.service.StatementResultServiceImpl.dispatchInternal（StatementResultServiceImpl.java:389）在com.espertech.esper.core.service.StatementResultServiceImpl.processDispatch（StatementResultServiceImpl.java:249）在com.espertech.esper.core.service.StatementResultServiceImpl.execute（StatementResultServiceImpl.java:235）在com.espertech.esper.core.service.UpdateDispatchViewBase.execute（UpdateDispatchViewBase.java:75）在com.espertech.esper.core.service.UpdateDispatchFutureSpin.execute（UpdateDispatchFutureSpin.java:85）在com.espertech.esper.dispatch.DispatchServiceImpl.dispatchFromQueue（DispatchServiceImpl.java:52）在com.espertech.esper.dispatch.DispatchServiceImpl.dispatch（DispatchServiceImpl.java:31）在com.espertech.esper.core.service.EPRuntimeImpl.dispatch（EPRuntimeImpl.java:1238）在com.espertech.esper.core.service.EPRuntimeImpl.processTimeEvent（EPRuntimeImpl.java:529）在com.espertech.esper.core.service.EPRuntimeImpl.processEvent（EPRuntimeImpl.java:423）在com.espertech.esper.core.service.EPRuntimeImpl.sendEvent（EPRuntimeImpl.java:197）在com.espertech.esper.core.service.EPRuntimeImpl.timerCallback（EPRuntimeImpl.java:171）在com.espertech.esper.timer.EPLTimerTask.run（EPLTimerTask.java:61） at java.util.concurrent.Executors $ RunnableAdapter.call（Executors.java:511） at java.util.concurrent.FutureTask.runAndReset（FutureTask.java:308） at java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.access $ 301（ScheduledThreadPoolExecutor.java:180） at java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.run（ScheduledThreadPoolExecutor.java:294）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:617）在java.lang.Thread.run（Thread.java:745）

当使用更新时，它会给出错误： com.espertech.esper.client.EPStatementSyntaxException: Incorrect syntax near 'StockEventWindow' expecting 'istream' but found an identifier at line 1 column 7 [update StockEventWindow set price = 200 where id = 10] at com.espertech.esper.epl.parse.ExceptionConvertor.convertStatement(ExceptionConvertor.java:40) at com.espertech.esper.epl.parse.ParseHelper.parse(ParseHelper.java:109) at com.espertech.esper.core.service.EPAdministratorHelper.compileEPL(EPAdministratorHelper.java:115) at com.espertech.esper.core.service.EPAdministratorHelper.compileEPL(EPAdministratorHelper.java:88) at com.espertech.esper.core.service.EPRuntimeImpl.getExecuteMethod(EPRuntimeImpl.java:1456) at com.espertech.esper.core.service.EPRuntimeImpl.executeQueryInternal(EPRuntimeImpl.java:1414) at com.espertech.esper.core.service.EPRuntimeImpl.executeQuery(EPRuntimeImpl.java:1407) at com.cor.cep.handler.Listener.onDemandUpdate(Listener.java:155) at com.cor.cep.handler.Listener.update(Listener.java:76) at com.espertech.esper.core.service.StatementResultServiceImpl.dispatchInternal(StatementResultServiceImpl.java:389) at com.espertech.esper.core.service.StatementResultServiceImpl.processDispatch(StatementResultServiceImpl.java:249) at com.espertech.esper.core.service.StatementResultServiceImpl.execute(StatementResultServiceImpl.java:235) at com.espertech.esper.core.service.UpdateDispatchViewBase.execute(UpdateDispatchViewBase.java:75) at com.espertech.esper.core.service.UpdateDispatchFutureSpin.execute(UpdateDispatchFutureSpin.java:85) at com.espertech.esper.dispatch.DispatchServiceImpl.dispatchFromQueue(DispatchServiceImpl.java:52) at com.espertech.esper.dispatch.DispatchServiceImpl.dispatch(DispatchServiceImpl.java:31) at com.espertech.esper.core.service.EPRuntimeImpl.dispatch(EPRuntimeImpl.java:1238) at com.espertech.esper.core.service.EPRuntimeImpl.processThreadWorkQueueLatchedSpin(EPRuntimeImpl.java:870) at com.espertech.esper.core.service.EPRuntimeImpl.processThreadWorkQueue(EPRuntimeImpl.java:778) at com.espertech.esper.core.service.EPRuntimeImpl.processWrappedEvent(EPRuntimeImpl.java:477) at com.espertech.esper.core.service.EPRuntimeImpl.processEvent(EPRuntimeImpl.java:438) at com.espertech.esper.core.service.EPRuntimeImpl.sendEvent(EPRuntimeImpl.java:197) at com.cor.cep.handler.StockEventHandler.handle(StockEventHandler.java:336) at com.cor.cep.util.RandomStockEventGenerator$1.run(RandomStockEventGenerator.java:63) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)

执行语句时出错：select子句表达式类型的无效null或零元素列表

1 个答案: