How to use oracle TRIM functionality in XML messages

Question

When i am selecting data from XML message as per below query, it is returing values correctly.
SELECT extractValue(x.column_value, '/DETAILS/EMPID') as emp_id,
extractValue(x.column_value, '/DETAILS/NAME') as emp_name,
extractValue(x.column_value, '/DETAILS/SALARY') as emp_sal
FROM TABLE(
XMLSequence(
Extract( xmltype('<DETAILS><EMPID>2482</EMPID><NAME>SMITH</NAME><SALARY>4854</SALARY><LOC>CHENNAI</LOC></DETAILS>'),'/DETAILS'))) x;
But when i am selecting data by using below query some additional spaces also coming with column values
SELECT extractValue(x.column_value, '/DETAILS/EMPID') as emp_id,
extractValue(x.column_value, '/DETAILS/NAME') as emp_name,
extractValue(x.column_value, '/DETAILS/SALARY') as emp_sal
FROM TABLE(
XMLSequence(
Extract( xmltype('<DETAILS>
               <EMPID>
                         2482
                         </EMPID>
                         <NAME>
                         SMITH
                         </NAME>
                         <SALARY>
                         4854
                         </SALARY>
                         <LOC>
                         CHENNAI
                         </LOC>
                         </DETAILS>'),'/DETAILS'))) x;
Please suggest how to remove additional spaces by using second query.
Thanks
Vikrant Jain.

Answer 1

It appears that the ability to use XPath functions in the PATH expression doesn't work prior to 11g :
Connecté à :
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> var xmldoc varchar2(4000)
SQL> begin :xmldoc := '<DETAILS>
  2  <EMPID>
  3  2482
  4  </EMPID>
  5  <NAME>
  6  SMITH
  7  </NAME>
  8  <SALARY>
  9  4854
10  </SALARY>
11  <LOC>
12  CHENNAI
13  </LOC>
14  </DETAILS>';
15  end;
16  /
Procédure PL/SQL terminée avec succès.
SQL> SELECT emp_id, emp_name, emp_sal
  2    FROM XMLTable('/DETAILS'
  3                  PASSING XMLTYPE(:xmldoc)
  4                  COLUMNS
  5                  emp_id     NUMBER        PATH 'normalize-space(EMPID)',
  6                  emp_name   VARCHAR2(20)  PATH 'NAME',
  7                  emp_sal    VARCHAR2(20)  PATH 'SALARY');
SELECT emp_id, emp_name, emp_sal
ERREUR à la ligne 1 :
ORA-31011: Echec d'analyse XML
ORA-19202: Une erreur s'est produite lors du traitement la fonction XML (
LPX-00601: Invalid token in: '/*/normalize-space(EMPID)')Using it in XQuery will work though :
SQL> SELECT *
  2  FROM XMLTable(
  3   'for $i in /DETAILS
  4    return element r
  5    {
  6     for $j in $i/*
  7     return element {local-name($j)} {normalize-space($j)}
  8    }'
  9   PASSING XMLTYPE(:xmldoc)
10   COLUMNS
11     emp_id     NUMBER        PATH 'EMPID',
12     emp_name   VARCHAR2(20)  PATH 'NAME',
13     emp_sal    NUMBER        PATH 'SALARY'
14  );
    EMP_ID EMP_NAME                EMP_SAL
      2482 SMITH                      4854