Missing linefeed in extract

Question

Hi,
we have a problem to extract an encoded(base64) pdf-document from a xmltype. The pdf-document is embedded in a node in a xml document. When we extract the valueof that node the carrige return and line feeds is missing. The statement looks like this:
select extract( iipax_datapart ,'/msg:Anropsmeddelande/msg:Nyttolast/stgans:Stamningsansokan/stgans:Dokument/stgans:Dokumentinnehall/text()','xmlns:msg="se/rif/si/meddelande/v1" xmlns:stgans="se/rif/am/stamningsansokan/v1"').getclobval()
from ink_iipax
where status = 'NEW';
We also tried getblobval(NLS_CHARSET_ID('AL32UTF8')) to an blob.
If we load the same file from disk and encode it in a PL/SQL test script to a clob/blob, the size differs with the the same amount as rows in the files. The test file is correct. So my conclusion is that the extract from xmltype must remove the CR/LF.
The database is 11g/r2.
Any idea? Kjell

Answer 1

Hi,
I don't see any problem using this (simple) example :
SQL> select * from v$version
  2  ;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE     11.2.0.1.0     Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL>
SQL> WITH sample_data AS (
  2   select xmltype('<ns1:root xmlns:ns1="test.ns1" xmlns:ns2="test.ns2">
  3  <ns2:doc>TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz
  4  IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg
  5  dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu
  6  dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo
  7  ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=
  8  </ns2:doc>
  9  </ns1:root>') doc
10  from dual
11  )
12  SELECT extract( t.doc,
13                  '/ns1:root/ns2:doc/text()',
14                  'xmlns:ns1="test.ns1", xmlns:ns2="test.ns2"'
15         ).getClobVal()
16         as base64str
17  FROM sample_data t
18  ;
BASE64STR
TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz
IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg
dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu
dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo
ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=
In 11g, now, the recommended method is to use XMLCast/XMLQuery for single node extraction (or XMLTable to extract sequence).
For example :
WITH sample_data AS (
select xmltype('<ns1:root xmlns:ns1="test.ns1" xmlns:ns2="test.ns2">
<ns2:doc>TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz
IHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg
dGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGlu
dWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo
ZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=
</ns2:doc>
</ns1:root>') doc
from dual
SELECT xmlcast(
         xmlquery('declare namespace ns1="test.ns1"; declare namespace ns2="test.ns2"; (::)
                   /ns1:root/ns2:doc'
                   passing t.doc
                   returning content
         ) as clob
       as base64str
FROM sample_data t
;Could you try this method with your data?