Why is the 'extract'-function in the newest XDK9.2.0.2 still buggy?

Question

Well it's me again.
here is the little foo-prg:
declare
tmp sys.xmltype:=sys.xmltype.createXML(
'<a>
<b id="1">1</b>
<b id="2">2</b>
</a>');
begin
dbms_output.put_line(tmp.extract('//b[@id="1"]').getstringval());
end;
and you will get:
declare
ERROR at line 1:
ORA-31012: Given XPATH expression not supported
ORA-06512: at "SYS.XMLTYPE", line 0
ORA-06512: at line 8
Why the way using the domparser & selectNodes you will get a correct output as you are expecting:
declare
parser      xmlparser.Parser;
dom_doc     xmldom.DOMDocument;
node_list     xmldom.DOMNodeList;
node_result varchar2(4000);
result varchar2(4000);
xml_doc          varchar2(4000):='<a>
<b id="1">1</b>
<b id="2">2</b>
</a>';
begin
parser := xmlparser.newParser;
xmlparser.parseBuffer(parser,xml_doc);
dom_doc := xmlparser.getDocument(parser);
xmlparser.freeParser(parser);
node_list:=xslprocessor.selectNodes(xmldom.makeNode(dom_doc),'/a/b[@id="2"]');
for idx in 0..xmldom.getLength(node_list)-1
loop
xmldom.writeToBuffer(xmldom.item(node_list,idx),node_result);
result:=result || node_result;
end loop;
xml.freeDocument(dom_doc);
dbms_output.put_line(result);
end;
the output is:
<b id="2">2</b>
PL/SQL procedure successfully completed.
what is wrong with the sys.xmltype.extract?
Regards,
Henrik Kuhn

Answer 1

For some prerecorded audio files the Transpose slider will not work reliably. I found no clear pattern, when it does and when not.
If all fails, create a loop from the audio file. Select the region in the track and use the command "File: Add region to Loop library".
Set the current key and tempo, name the loop, and save the loop.
Now add it from the loop browser to a new track and delete your old track. The search field in the Loop browser will help you to find the loop quickly.
You will be able to transpose the sample as described above, like a regular loop.
For example - a audio file turned into a loop and transposed: