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extractvalue returns null [message #169015]

Mon, 24 April 2006 13:14

asowmyan
Messages: 1
Registered: April 2006

Junior Member

Hi

I dont get any result when I run this pl/sql. But when I remove the xmlns...from <analyzeaddressresponse> element I get the correct output. Can anybody tell me why I dont get any output with xmlns??????

DECLARE
x XMLTYPE := XMLTYPE('
<AnalyzeAddressResponse xmlns="http://somesite.com/Advance/Analyze">
<AnalyzeAddressResult>
<Layers>
<Layer>
<Fields>
<Field>
<Name>Place</Name>
<Value>North Central</Value>
</Field>
<Field>
<Name>INSPECTOR</Name>
<Value>Nicole</Value>
</Field>
<Field>
<Name>OFFICE_NUM</Name>
<Value>123-4567</Value>
</Field>
</Fields>
</Layer>
</Layers>
</AnalyzeAddressResult>
</AnalyzeAddressResponse>');
BEGIN
FOR i IN ( SELECT EXTRACTVALUE(VALUE(t), '/Field/Name') field_name,
EXTRACTVALUE(VALUE(t), '/Field/Value') field_value
FROM TABLE(XMLSEQUENCE(EXTRACT(x, '/AnalyzeAddressResponse/AnalyzeAddressResult/Layers/Layer/Fields/Field'))) t )
LOOP
dbms_output.put_line(i.field_name || i.field_value);
END LOOP;

END;

Thanks

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Re: extractvalue returns null [message #181635 is a reply to message #169015]

Mon, 10 July 2006 23:37

hobbes
Messages: 173
Registered: January 2006

Senior Member

You need to mention namespaces as parameters in the EXTRACT and EXTRACTVALUE functions as well.

SQL> DECLARE 
  2  x XMLTYPE := XMLTYPE('
  3  <AnalyzeAddressResponse xmlns="http://somesite.com/Advance/Analyze">
  4  <AnalyzeAddressResult>
  5  <Layers>
  6  <Layer>
  7  <Fields>
  8  <Field>
  9  <Name>Place</Name>
 10  <Value>North Central</Value>
 11  </Field>
 12  <Field>
 13  <Name>INSPECTOR</Name>
 14  <Value>Nicole</Value>
 15  </Field>
 16  <Field>
 17  <Name>OFFICE_NUM</Name>
 18  <Value>123-4567</Value>
 19  </Field>
 20  </Fields>
 21  </Layer>
 22  </Layers>
 23  </AnalyzeAddressResult>
 24  </AnalyzeAddressResponse>');
 25  BEGIN
 26    FOR i IN ( SELECT EXTRACTVALUE(VALUE(t), 
 27                    '/Field/Name', 'xmlns="http://somesite.com/Advance/Analyze"') field_name,
 28                    EXTRACTVALUE(VALUE(t), 
 29                    '/Field/Value', 'xmlns="http://somesite.com/Advance/Analyze"') field_value
 30               FROM TABLE(XMLSEQUENCE(EXTRACT(x, 
 31                                    '/AnalyzeAddressResponse/AnalyzeAddressResult/Layers/Layer/Fields/Field',
 32                                    'xmlns="http://somesite.com/Advance/Analyze"'))) t )
 33    LOOP
 34      dbms_output.put_line(i.field_name || i.field_value);
 35    END LOOP;
 36  
 37  END;
 38  /
PlaceNorth Central
INSPECTORNicole
OFFICE_NUM123-4567

PL/SQL procedure successfully completed.

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