Comments on: Selecting (XML) data directly from disk

By: Karin Kriebisch

Karin Kriebisch — Wed, 13 Feb 2008 20:40:42 +0000

Hello Marco,
I have some questions about your article:
Can give any indication about the performance of this read action? Where is the greatest restriction in the performance?
Are there any restrictions on the file sizes other than the OS?
And in which circumstances would you preferably use this technique?

Cheers,
Karin

By: Marco Gralike

Marco Gralike — Tue, 05 Feb 2008 13:54:24 +0000

The encoding bit is due to your client NLS setting, see: http://forums.oracle.com/forums/thread.jspa?messageID=1255505

By: anton

anton — Tue, 05 Feb 2008 13:42:53 +0000

On 10.2.0.2.0 it works without the extract. Note by the way how the encoding is changed to “ISO-8859-1″

[pre]

PGI@pgio> select XMLTYPE(bfilename(‘XMLSTORE’,'data.xml’),NLS_CHARSET_ID(‘AL32UTF8′)) as “XDATA”
2 from dual
3 /

XDATA
——————————————————————————–

0
Text

[/pre]

By: Marco Gralike

Marco Gralike — Mon, 04 Feb 2008 16:21:30 +0000

A drive local to your database server. No, it also works for other operating systems (adjust your directory alias accordingly).

By: anton

anton — Mon, 04 Feb 2008 16:16:38 +0000

Nice, but it raise some questions:

What is a “Windows local drive”? A drive local to your database server? A drive local to your database client?
Is the above code only working for Windows?