mapper层的作用是对数据库进行数据持久化操作，他的方法语句是直接针对数据库操作的现在用mybatis逆向工程生成的。mapper层，其实就是dao层，主要是做数据持久层的工作，负责与数据库进行联络的一些任务都封装在此。...

文档解释ORA-39172:Cannotremaptransportabletablespacenameswithcompatibilityofstring.Cause:Theuserattemptedtoremapatablespacenameinatransportabletablespacejobwhenthec...

文档解释ORA-25110:NOSORTmaynotbeusedwithabitmapindexCause:AnattemptwasmadetocreateabitmapindexusingtheNOSORToption.Action:RemoveNOSORTfromtheCREATEBITMAPINDEXstatem...

文档解释ORA-39045:invalidmetadataremapnamestringCause:AninvalidmetadataremapnamewasspecifiedonaDBMS_DATAPUMP.METADATA_REMAPAPIcall.Action:Correctthemetadataremapnam...

文档解释ORA-39234:Datacannotberemappedunderthedirectpathaccessmethod.Cause:Dataremappingwasrequestedonajobthatrequiresthedirectpathaccessmethod.Dataremappingcanonly...

文档解释ORA-39232:invalidremapfunction:stringCause:Thespecifiedpackagefunctionforperformingdataremappingwasnotfound.Action:Eithercreatethespecifiedpackagefunctionor...

文档解释ORA-14300:partitioningkeymapstoapartitionoutsidemaximumpermittednumberofpartitionsCause:Therowinsertedhadapartitioningkeythatmapstoapartitionnumbergreaterth...

文档解释ORA-47033:Factorlinkforstringandstringisreferredbyoneormoreidentitymaps.Cause:Thespecifiedfactorlinkwasreferredbyexistingidentitymaps.Action:Removethedepend...

文档解释ORA-32052:failedtostartmappingserviceCause:Themappingservicefailedtostartproperly.Action:CheckFMONtracefilesforerrors.ORA-32052表明应用程序无法启动映射服务。它是一个致命错误，必须修复才...

文档解释ORA-07339:spcre:maximumnumberofsemaphoresetsexceeded.Cause:Theinternalbufferisnotbigenoughtoholdthenumberofsemaphoresetidentifiersrequested.Action:Reconfigu...

文档解释ORA-07253:spdes:semctlerror,unabletodestroysemaphoreset.Cause:Semctlsystemcallreturnedanerror.Action:Checksemaphoresets.Mayrequiremanualcleanup.Checkadditio...

文档解释ORA-47045:IdentitystringforFactorstringisusedbyoneormoreidentitymaps.Cause:Thespecifiedidentitywasusedbyexitingidentitymap(s).Action:Removethedependentident...

文档解释ORA-27139:unabletoreserveOracleVMmappinginprocessaddressspaceCause:Theaddressspaceregionwasalreadymapped.Action:ContactOracleSupportServices.官方解释常见案例一般处理方法及...

文档解释ORA-28670:mappingtablecannotbedroppedduetoanexistingbitmapindexCause:UserattemptedtodropthemappingtablewithNOMAPPINGoptionwhentheIOThasoneormorebitmapindexe...

文档解释ORA-27235:unabletomapfileregionintomemoryCause:Afileregioncouldnotbemappedintomemory.Action:Seeaccompanyingerrors.。ORA-27235错误消息表明，在映射文件到内存时发生了错误。在系统报告此消息时，...