Update xml column by inserting any missing child nodes from a M_V

Question

Hello all,
I am trying to update a xml column(col1) of a table (abc) by looping through, by selecting from a materialized view and find any missing (child) nodes in the existing table (abc) of a xml column (col1) on each rows, and then do update the xml column (col1) of table (abc). How to do this in Oracle pl/sql?.
Thanks & Regards,
Josh

Answer 1

You do not need stored procedure for that. Use something like APPENDCHILDXML, INSERTCHILDXML or INSERTXMLBEFORE. For example, to insert a node into XML document:
SELECT  APPENDCHILDXML(
                       XMLTYPE(
                               CURSOR(
                                      SELECT  ENAME,
                                              SAL
                                        FROM  EMP
                                        WHERE DEPTNO = 10
                      '//ROW',
                      XMLTYPE('<ROW><ENAME>user631757</ENAME><SAL>10000</SAL></ROW>')
                     ) EMP_XML
  FROM  DUAL
EMP_XML
<?xml version="1.0"?><ROWSET><ROW><ENAME>CLARK</ENAME><SAL>2450</SAL><ROW><ENAME
user631757</ENAME><SAL>10000</SAL></ROW></ROW><ROW><ENAME>KING</ENAME><SAL>5000</SAL><ROW><ENAME>user631757</ENAME><SAL>10000</SAL></ROW></ROW><ROW><ENAME>MILL
ER</ENAME><SAL>1300</SAL><ROW><ENAME>user631757</ENAME><SAL>10000</SAL></ROW></R
OW></ROWSET>
SELECT  INSERTXMLBEFORE(
                        XMLTYPE(
                                CURSOR(
                                       SELECT  ENAME,
                                               SAL
                                         FROM  EMP
                                         WHERE DEPTNO = 10
                       '//ROW[ENAME="KING"]',
                       XMLTYPE('<ROW><ENAME>user631757</ENAME><SAL>10000</SAL></ROW>')
                      ) EMP_XML
  FROM  DUAL
EMP_XML
<?xml version="1.0"?><ROWSET><ROW><ENAME>CLARK</ENAME><SAL>2450</SAL></ROW><ROW>
<ENAME>user631757</ENAME><SAL>10000</SAL></ROW><ROW><ENAME>KING</ENAME><SAL>5000
</SAL></ROW><ROW><ENAME>MILLER</ENAME><SAL>1300</SAL></ROW></ROWSET>
SQL> SY.