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  • PLSQL --> INSTEAD OF 触发器

    可以用instead of触发器来解释insert、update和delete语句,并用备用的程序代码替换那些指令。 一、不可更新视图 基于下列情形创建的视图,不可直接对其进行dml操作 使用了集合操作运算符(union,union all ,intersect,minus)使用了分组函数(min,max,sum,avg) 使用了group by ,connect by ,start with 子句 使用了...
  • could only be replicated to 0 nodes, instead of 1

    warn hdfs.dfsclient: datastreamer exception:org.apache.hadoop.ipc.remoteexception: java.io.ioexception:file inputlicense.txt could only be replicated to 0 nodes,instead of 1 atorg.apache.hadoop.hdfs.server.namenode.fsnamesystem.getadditionalblock(fsnamesystem.java:1920) atorg.apache.hadoop...
  • 前端开发:Vue项目中解决Emitted value instead of an instance of Error问题

    分享一个在刚接触前端开发的开发者常遇到的一个经典错误,那就是在vue项目运行中遇到emitted value instead of an instance of error的问题,附带解决该问题的方法以及原理。 重现报错提示:(emitted value instead of an instance of error) :component lists rendered with v-for should have explicit keys. see ...
  • HDFS中如何解决error: could only be replicated to 0 nodes, instead of 1?(2 个回答)

    已经打开安全从0到60000(!)的所有tcp端口,所以我不认为这是。 我收到错误 java.io.ioexception:file userubuntupies could only be replicated to 0 nodes,instead of 1atorg.apache.hadoop.hdfs.server.namenode.fsnamesystem.getadditionalblock(fsnamesystem.java:1448)atorg.apache.hadoop.hdfs.server.name...
  • SAP 对HU做货物移动报错-Only 0 serial numbers entered instead of 30 -

    sap 对hu做货物移动报错-only 0 serial numbers entered instead of 30 -元旦刚过,就收到客户的业务人员报错说,当其对hu做转库(同一个公司代码下工厂到工厂或者同一个工厂下存储地点对存储地点)都不成功,报错如下:only 0 serial numbers entered instead of 30? 以第一个hu为例,里面是包含有30个序列号的,?...
  • Use WebGUI instead of SAPGUI

    the limitation is that abap code highlight is not supported in webgui. as aresult, if you need to write abap code,you’d better to still use sapgui or abap in eclipse.? but if your daily work just consists of light-weight operations such as goingthrough customizing via spro, checking table ...
  • Use WebGUI instead of SAPGUI

    the limitation is that abap code highlight is not supported in webgui. as aresult, if you need to write abap code,you’d better to still use sapgui or abap in eclipse.? but if your daily work just consists of light-weight operations such as goingthrough customizing via spro, checking table ...
  • Use WebGUI instead of SAPGUI

    the limitation is that abap code highlight is not supported in webgui. as aresult, if you need to write abap code,you’d better to still use sapgui or abap in eclipse.? but if your daily work just consists of light-weight operations such as goingthrough customizing via spro, checking table ...
  • 错误是什么意思?warning: static method should be qualified by type name, AnchorPane, instead of by an expression(1 个回答)

    我收到这样的警告:warning: static method should be qualified by type name,anchorpane, instead of by an expression 这是我的代码:public chart(vector v, final pane p, final anchorpane ap){ super(); this.v = v; p.heightproperty().addlistener(new changelistener(){ public void changed(observable...
  • Try to use JDK instead of JRE to debug source code

    install jdk and configure it in your eclipse: ?...
  • use regular expression instead of ABAP function module to parse attachment

    ls_key的一个例子:? 这个fm的作用就是解析用两个分隔开的document type: l, document class:crm_l_ord和document guid。 这个fm用的传统的做法,把三个k split到一个internal table里,然后read table index 1,2,3的方式分别取出每个key。 用了42行代码。? 如果用正则表达式,只需1行代码:? 而且后者比前者快3~6倍...
  • getStorage:fail parameter error: parameter should be Object instead of String;

    从上图可以看出是使用getstorage导致的,因为我是把vue缓存方法localstorage直接改为:wx.getstorage(carts),忘记了小程序原生缓存方式了。 查看官网,发现官网提示的写法为:wx.getstorage({ key: key, success(res) { console.log(res.data) }})wx.getstoragesync(key)确定原因:wx.getstorage(key) 这种方式不可行...
  • help

    if you specify using tdr,then the records will be parsed by tdr file and print in xml format. you canwrite the result into a file,which can be used by load it only support select * instead of select part ofthe fields when specify using tdr note:-index only used for list table globle index ...
  • 高负载

    返回结果如下: -o, --only only show processes or threads actually doing io,instead of showing all processes or threads. this can be dynamically toggledby pressing o. -p,--processes only show processes. normally iotop shows all threads. -a,--accumulated show accumulated io instead of bandwidth...
  • pprof 的原理与实现

    { if count == 0 || size == 0 { return 0, 0 } if rate = n,goroutineprofile copies the profile into p and returns n,true. if len(p) < n, goroutineprofile does not change p and returns n,false. most clients should use the runtimepprof package instead of callinggoroutineprofile directly.func...
  • The Annual Summary Of 2019

    it is a shame not achieve this target. instead of reading the whole books,i read more single posts or chapters partly in the last year.finishing avaluable project: there are some valuable projects in my daily work,theyre still in progress.deep into react community, submit a pr:there is some ...
  • The Framing of the Developer

    instead of charting long journeys.the first method to reflect this was extremeprogramming (xp) at the end of the 90s. xp brought agile and iterativedevelopment to many developers and introduced the concept of“on site customer”. the idea is to have a customer available to the development team...
  • 90% of python in 90 minutes

    return 2 more than num return num + 2 five =add_2(3) def function name(parameters) :+ indent optional documentation body return whitespace instead of{ use a : and indentconsistently (4 spaces) invoke python -tt to error outduringinconsistent tabspace usage in a file default (named) ...
  • Design of the Shutdown Hooks API

    amended to save that information as well. making hooks be threads instead ofrunnables or event listeners insulates them from this sort of futurechange.okay,but wont i have to write a lot of code just to register a simple shutdown hook? no. simple shutdown hooks can often be written as ...
  • inbound processing of equipment download including hierarchy

    it consists of two major steps:after step1,there is an save operation performed on all equipment involvled in currentbdoc. instead of performing the object one by one,all objects are saved by the function module in a single shot. before thesave is actually performed,there is a check logic ...

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