Please suppose you have a XML file (stored, for example, in an Oracle table which has also a CLOB column):
<ALFA>
<BETA>0123</BETA>
<GAMMA>2345</GAMMA>
<DELTA>
<EPSILON>3</EPSILON>
</DELTA>
</ALFA>
How can I produce, in output, the list of all possible paths?
/ALFA/BETA/text()
/ALFA/GAMMA/text()
/ALFA/DELTA/EPSILON/text()
My need is the following: I have to EXTRACT many information from a long XML and I have to use XMLEXTRACT with all possible paths, so I would like to know if is it possible to "dbms_output.put_line" them in an automatic way.
I need a solution which is independent from the name of the tags.
Please suppose that the XML is well-formed.
Thank you in advance for your kind help.
How can I proceed if Oracle Java Extension has not been installed, and I receive the following error?
ORA-19112: error raised during evaluation:
ORA-06550: line 1, column 13:
PLS-00201: identifier 'SYS.DBMS_XQUERYINT' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
Please suppose that I am not DBA, and DBA don't authorize Oracle Java Extension installation.
You can use XMLTable
to produce list of paths with XQuery.
E.g.
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'
)
but it's a wrong way at least because it's not effective as it can.
Just extract all values with same 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'
)