How to Extract xmltype as xml in Oracle

Question

I am trying to extract xml from the xmltype doc.

DECLARE
  xmlData         XMLType;
  sDocumentId     VARCHAR2(100);
  sFormat         VARCHAR2(100);
  cData           CLOB;
BEGIN
  xmlData := XMLType( '<main>
                      <document_id>1234567</document_id>
                      <format>E66</format>
                      <data><Fname>ABCD</Fname><Lname>EFGD</Lname></data>
                  </main>');

  SELECT ExtractValue(xmlData, '/main/document_id/text()'),
         ExtractValue(xmlData, '/main/format/text()'),
         ExtractValue(xmlData, '/main/data/text()')
  INTO sDocumentId,
       sFormat,
       cData
  FROM (SELECT xmlData  FROM DUAL);

  dbms_output.put_line(sDocumentId);
  dbms_output.put_line(sFormat);
  dbms_output.put_line(cData);
END;

How to get the output like this:

• DocumentId = 1234567
• sFormat = E66
• cData = <Fname>ABCD</Fname><Lname>EFGD</Lname>

Answer 1

You can do it like this:

SELECT  EXTRACTVALUE(xmlData, '/main/document_id/text()'),
    EXTRACTVALUE(xmlData, '/main/format/text()'),
    EXTRACT(xmlData, '/main/data').GetClobVal()
INTO   sDocumentId,
    sFormat,
    cData
FROM (SELECT  xmlData  FROM DUAL) t;

Please note, EXTRACTVALUE and EXTRACT are deprecated. However, I did not manage to use XMLTABLE, but this could be a starting point:

SELECT *
INTO   sDocumentId,
    sFormat,
    cData
FROM XMLTABLE('/main' PASSING xmlData COLUMNS 
    sDocumentId  VARCHAR2(100) PATH 'document_id/text()',
    sFormat  VARCHAR2(100) PATH 'format/text()',
    cData  VARCHAR2(1000) PATH 'data/text()');