marklogic中的存储元素是什么? [英] What are in memory elements in marklogic?

问题描述

我有几个文档，其中某些元素上的xdmp:node-replace()无效.还有一些其他文档集几乎与有问题的文档集相似，但是xdmp:node-replace可以很好地处理它们.尝试了所有可能出错但无济于事的可能性.阅读一些xdmp:node-replace函数在'内存元素'中不起作用的地方.

I have couple of documents on which xdmp:node-replace() over certain elements doesnot work. There are some other set of documents which are almost similar to the ones that has problem but xdmp:node-replace works perfectly fine on them. Tried all possibilities that could have gone wrong but in vain. Read some where that xdmp:node-replace function does not work on 'in memory elements'.

因此，为了验证问题是否出在"内存元素"中，我想知道具体是什么.

So in order to verify whether the issue is with 'in memory elements', I want to know what exactly it is.

对此有任何帮助

推荐答案

查询中构造的任何内容都是内存中元素.例如，此XQuery产生一个内存中元素:

Anything constructed within a query is an in-memory element. For example this XQuery yields an in-memory element:

<test/>

某些函数调用还会返回内存中的元素:xdmp:unquote是一个明显的示例.并非来自当前数据库的任何节点都将被视为内存中节点.

Some function calls also return in-memory elements: xdmp:unquote is an obvious example. Any node that doesn't come from the current database will be treated as an in-memory node.

此查询产生一个数据库元素(如果存在)，可以使用xdmp:node-replace进行修改:

This query yields a database element (if it exists), which could be modified using xdmp:node-replace:

doc('fubar')/test

这是一个典型的内存更新错误:

This is a typical in-memory update error:

xdmp:node-replace(<x/>, <y/>)

对于MarkLogic 6.0-1.1，错误代码为XDMP-UPCONSTNODES.

With MarkLogic 6.0-1.1, the error code is XDMP-UPCONSTNODES.

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