XMLTable.. how to reading the parent node..

Question

<CONTEXT>
<UID>
<id>23</id>
<STARTTIME>01/01/2010</STARTTIME>
<STOPTIME>01/31/2010 23:59:59</STOPTIME>
<ACCOUNTID>
<acctid>Ac1</acctid>
<METERID>
<namek>METER1</namek>
<DETERMINANTVALUES>
<value>
<name>RECORDED_KWH</name>
<reading_charges>13955.58</reading_charges>
<cost>2.81</cost>
</value>
<value>
<name>STRND_KW_CHARGES</name>
<reading_charges>89.84</reading_charges>
<cost>2.01</cost>
</value>
<value>
<name>DEL_CHARGES</name>
<reading_charges>891.84</reading_charges>
<cost>5.29</cost>
</value>
</DETERMINANTVALUES>
</METERID>
<METERID>
<namek>METER2</namek>
<DETERMINANTVALUES>
<value>
<name>RECORDED_KWH</name>
<reading_charges>139553.58</reading_charges>
<cost>2.81</cost>
</value>
<value>
<name>STRND_KW_CHARGES</name>
<reading_charges>893.84</reading_charges>
<cost>2.01</cost>
</value>
<value>
<name>DEL_CHARGES</name>
<reading_charges>8913.84</reading_charges>
<cost>5.29</cost>
</value>
                    </DETERMINANTVALUES>
               </METERID>
               </ACCOUNTID>
     </UID>
</CONTEXT>
This XML data is read and put into an XMLType variable. We want each meters different values to be different rows:
select t.*
from
XMLTABLE('for $i in /CONTEXT/UID/ACCOUNTID/METERID/DETERMINANTVALUES/value return $i'
passing var1
COLUMNS
detval1 varchar2(100) PATH 'reading_charges',
meterid varchar2(100) PATH '../../name'
) t;
but the meterid fetches null value .. how can we fetch
uid1, accountid1, reading_charge1, cost1
uid1, accountid1, reading_charge2, cost2
uid1, accountid1, reading_charge3, cost3
Edited by: user3178919 on Feb 10, 2010 7:49 AM

Answer 1

Heres the formatted XML:
<CONTEXT>
     <UID>
          <id>23</id>
          <STARTTIME>01/01/2010</STARTTIME>
          <STOPTIME>01/31/2010 23:59:59</STOPTIME>
          <ACCOUNTID>
               <acctid>Ac1</acctid>
               <METERID>
                    <namek>METER1</namek>
                    <DETERMINANTVALUES>
                         <value>
                              <name>RECORDED_KWH</name>
                              <reading_charges>13955.58</reading_charges>
                              <cost>2.81</cost>
                         </value>
                         <value>
                              <name>STRND_KW_CHARGES</name>
                              <reading_charges>89.84</reading_charges>
                              <cost>2.01</cost>
                         </value>
                         <value>
                              <name>DEL_CHARGES</name>
                              <reading_charges>891.84</reading_charges>
                              <cost>5.29</cost>
                         </value>
                    </DETERMINANTVALUES>
               </METERID>
               <METERID>
                    <namek>METER2</namek>
                    <DETERMINANTVALUES>
                         <value>
                              <name>RECORDED_KWH</name>
                              <reading_charges>139553.58</reading_charges>
                              <cost>2.81</cost>
                         </value>
                         <value>
                              <name>STRND_KW_CHARGES</name>
                              <reading_charges>893.84</reading_charges>
                              <cost>2.01</cost>
                         </value>
                         <value>
                              <name>DEL_CHARGES</name>
                              <reading_charges>8913.84</reading_charges>
                              <cost>5.29</cost>
                         </value>
                    </DETERMINANTVALUES>
               </METERID>
          </ACCOUNTID>
     </UID>
</CONTEXT>
Expected output:
UID-ID, ACCOUNTID-acctid, METERID-NAME, DETERMINANT-value-reading-charges
23 Ac1 METER1 13955.58
23 Ac1 METER1 89.84
23 Ac1 METER1 891.84
because if we do as shown below the meterid value comes as NULL (not able to go the parent node and get the values)
select t.*
from
XMLTABLE('for $i in /CONTEXT/UID/ACCOUNTID/METERID/DETERMINANTVALUES/value return $i'
passing var1
COLUMNS
detval1 varchar2(100) PATH 'reading_charges',
meterid varchar2(100) PATH '../../name'
) t;
IF we do 'for $i in /CONTEXT
return $i//UID/ACCOUNTID/METERID/DETERMINANTVALUES/value'
- will we be able to get the paret node value
Can this be achieved using multiple XMLTable only can be achieved using single XMLTable?