从 BaseX GUI 直接写入文件 [英] Write directly to file from BaseX GUI

问题描述

我编写了一个 XQuery 表达式，它有大约 50MB 的大结果，需要几个小时来计算.我在 BaseX GUI 中执行它，但这有点不方便:它将结果裁剪到结果窗口，然后我必须保存它.此时，BaseX 变得无响应并可能崩溃.

I wrote an XQuery expression that has a large result of about 50MB and takes a couple of hours to compute. I execute it in the BaseX GUI, but this is a little inconvenient: it crops the result to a result window, which I then have to save. At this time, BaseX becomes unresponsive and may crash.

有没有办法直接将结果写入文件?

Is there a way to directly write the result to a file?

推荐答案

看看 BaseX' 文件模块，它提供了广泛的功能来读写文件和遍历文件系统.

Have a look at BaseX' file module, which provides broad functionality to read and write from files and traverse the file system.

对于你来说，file:write($path as xs:string, $items as item()*) as empty-sequence() 将特别有趣，它允许将元素序列写入文件.例如:

For you, file:write($path as xs:string, $items as item()*) as empty-sequence() will be of special interest, which allows to write an element sequence to a file. For example:

file:write(
  '/tmp/output.xml',
  <root>{
    for $i in 1 to 1000000
    return <some-large-amount-of-data />
  }</root>
)

如果您的输出不是格式良好的 XML，请考虑使用 file:write-binary、file:write-text 和 file:write-text-lines 函数.

If your output isn't well-formed XML, consider the file:write-binary, file:write-text and file:write-text-lines functions.

另一种选择可能是写入数据库中的文档而不是文件.db:add 和 db:create 来自 数据库模块可用于将计算结果添加到当前或新数据库中.

Yet another alternative might be writing to documents in the database instead of files. db:add and db:create from the database module can be used to add the computed results to the current or a new database.

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