Da XML a elenco di percorsi in ambiente Oracle PL/SQL

Puoi utilizzare XMLTable per produrre un elenco di percorsi con XQuery.

Per esempio.

(SQLFiddle )

with params as (
  select 
    xmltype('
      <ALFA>
        <BETA>0123</BETA>
        <GAMMA>2345</GAMMA>
        <DELTA>
           <EPSILON>3</EPSILON>
        </DELTA>
      </ALFA>
    ') p_xml
  from dual  
)    
select
  path_name || '/text()'
from
  XMLTable(
    '
      for $i in $doc/descendant-or-self::*
        return <element_path> {$i/string-join(ancestor-or-self::*/name(.), ''/'')} </element_path>
    '
    passing (select p_xml from params) as "doc"
    columns path_name varchar2(4000) path '//element_path'
  )

ma è un modo sbagliato almeno perché non è efficace come può.

Basta estrarre tutti i valori con lo stesso XQuery:(SQLFiddle )

with params as (
  select 
    xmltype('
      <ALFA>
        <BETA>0123</BETA>
        <GAMMA>2345</GAMMA>
        <DELTA>
           <EPSILON>3</EPSILON>
        </DELTA>
      </ALFA>
    ') p_xml
  from dual  
)    
select
  element_path, element_text
from
  XMLTable(
    '              
      for $i in $doc/descendant-or-self::*
        return <element>
                 <element_path> {$i/string-join(ancestor-or-self::*/name(.), ''/'')} </element_path>
                 <element_content> {$i/text()}</element_content>
               </element>  
    '
    passing (select p_xml from params) as "doc"
    columns 
      element_path   varchar2(4000) path '//element_path',
      element_text   varchar2(4000) path '//element_content'
  )