Xml extract problem

Question

I have a problem about sql to extract xml node,the sql followed:
select a.disptx.extract('/Record/_20/text()').getStringVal() from swifti a where swidty = '6666666666666666666'
and the clob is :
<Record>
<swrctm>2223</swrctm>
<swintm>22:23:13</swintm>
<swindt>20100826</swindt>
<fmbank>ssssss</fmbank>
<tobank>444444rrrrrrr</tobank>
<fm>sdfds</fm>
<to>wwwwwwwwww</to>
<mgtype>103</mgtype>
<swftid>dddddd</swftid>
<sw108f>dddddd</sw108f>
<swackf>0</swackf>
<_20>fffffffffff</_20>
</Record>
that throw the exception:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00601: Invalid token in: '/Record/_20/text()'
ORA-06512: at "SYS.XMLTYPE", line 111
31011. 00000 - "XML parsing failed"
*Cause:    XML parser returned an error while trying to parse the document.
*Action:   Check if the document to be parsed is valid.
can help me?

Answer 1

you need convert clob to xmltype
select xmltype(a.disptx).extract('/Record/_20/text()').getStringVal() from swifti a
create table test (x clob);
Table created.
insert into test values ('<Record>
<swrctm>2223</swrctm>
<swintm>22:23:13</swintm>
<swindt>20100826</swindt>
<fmbank>ssssss</fmbank>
<tobank>444444rrrrrrr</tobank>
<fm>sdfds</fm>
<to>wwwwwwwwww</to>
<mgtype>103</mgtype>
<swftid>dddddd</swftid>
<sw108f>dddddd</sw108f>
<swackf>0</swackf>
<_20>fffffffffff</_20>
</Record>');
commit;
1 row created.
Commit complete.
SELECT xmltype(x).EXTRACT ('/Record/_20/text()').getstringval ()
  FROM test;
XMLTYPE(X).EXTRACT('/RECORD/_20/TEXT()').GETSTRINGVAL()                        
fffffffffff                                                                    
1 row selected.http://docs.oracle.com/cd/B10500_01/appdev.920/a96620/xdb04cre.htm