Question

SET PAGES 0;
SET LINE 1000;
SET LONG 9999999;
SPOOL C:\pensionnew.xml;
col foo format a60000
SELECT DBMS_XMLGEN.GETXML('SELECT * FROM DATAAG')foo FROM DUAL;
SPOOL OFF;

i use this code for generating xml.. the answer is:suppose the the column not have value means the tag wont came . i need empty tag for that for that

Answer 1

use the API for it, dont use the quick fire getxml(string) version.

eg:

SQL> variable xml clob;
SQL> declare
  2    ctx number;
  3  begin
  4    dbms_lob.createtemporary(:xml, true, dbms_lob.call);
  5    ctx := dbms_xmlgen.newcontext('select * from foo');
  6    dbms_xmlgen.setnullhandling(ctx, dbms_xmlgen.EMPTY_TAG);
  7    dbms_xmlgen.getxml(ctx, :xml);
  8    dbms_xmlgen.closecontext(ctx);
  9  end;
 10  /

PL/SQL procedure successfully completed.

SQL> print xml

XML
--------------------------------------------------------------------------------
<?xml version="1.0"?>
<ROWSET>
 <ROW>
  <ID>1</ID>
  <A>a</A>
 </ROW>
 <ROW>
  <ID>2</ID>
  <A/>
 </ROW>
</ROWSET>