Get the value and index of array attribute of xmlns data using postgresql query. The xmlns file is stored in the table test and it contains multiple rows(xmlns files)

<sample-test-data-history xmlns="http://www.dmotorworks.com/sample-test-data-history">
  <payPaymentCode>
    <V Idx="1">CASH</V>
  </payPaymentCode>
  <Type>
      <V Idx="1">Cat</V>
      <V Idx="2">Mouse</V>
      <V Idx="3">Tree</V>
   </Type>
  <totMiscCost>
    <V Idx="1">100.00</V>
    <V Idx="2">150.00</V>
    <V Idx="3">200.00</V>
  </totMiscCost>
 
</sample-test-data-history>

SELECT (xpath('(//dns:totMiscCost/dns:V[@Idx=
			  //dns:Type/dns:V[text()="Cat"]/@Idx]/text())[1]',
              nmuloc,
              ARRAY[ARRAY['dns',
                          'dmotorworks.com/sample-test-data-history']]))[1]
       FROM test;