You can achieve that with help of XMLTable function from Oracle XML DB XQuery function set:
select * from
XMLTable(
'
declare function local:path-to-node( $nodes as node()* ) as xs:string* {
$nodes/string-join(ancestor-or-self::*/name(.), ''/'')
};
for $i in $rdoc//name
return <ret><name_path>{local:path-to-node($i)}</name_path>{$i}</ret>
'
passing
XMLParse(content '
<users><user><name>user1</name></user>
<user><name>user2</name></user>
<group>
<user><name>user3</name></user>
</group>
<user><name>user4</name></user>
</users>'
)
as "rdoc"
columns
name_path varchar2(4000) path '//ret/name_path',
name_value varchar2(4000) path '//ret/name'
)
For me XQuery looks at least more intuitive for XML data manipulation than XSLT.
You can find useful set of XQuery functions here.
Update 1
I suppose that you need totally plain dataset with full data at last stage. This target can be reached by complicated way, constructed step-by-step below, but this variant is very resource-angry. I propose to review final target (selecting some specific records, count number of elements etc.) and after that simplify this solution or totally change it.
Update 2
All steps deleted from this Update except last because @A.B.Cade proposed more elegant solution in comments. This solution provided in Update 3 section below.
Step 1 - Constructing dataset of id's with corresponding query results
Step 2 - Aggregating to single XML row
Step 3 - Finally get full plain dataset by querying constracted XML with XMLTable
with xmlsource as (
-- only for purpose to write long string only once
select '
<users><user><name>user1</name></user>
<user><name>user2</name></user>
<group>
<user><name>user3</name></user>
</group>
<user><name>user4</name></user>
</users>' xml_string
from dual
),
xml_table as (
-- model of xmltable
select 10 id, xml_string xml_data from xmlsource union all
select 20 id, xml_string xml_data from xmlsource union all
select 30 id, xml_string xml_data from xmlsource
)
select *
from
XMLTable(
'
for $entry_user in $full_doc/full_list/list_entry/name_info
return <tuple>
<id>{data($entry_user/../@id_value)}</id>
<path>{$entry_user/name_path/text()}</path>
<name>{$entry_user/name_value/text()}</name>
</tuple>
'
passing (
select
XMLElement("full_list",
XMLAgg(
XMLElement("list_entry",
XMLAttributes(id as "id_value"),
XMLQuery(
'
declare function local:path-to-node( $nodes as node()* ) as xs:string* {
$nodes/string-join(ancestor-or-self::*/name(.), ''/'')
};(: function to construct path :)
for $i in $rdoc//name return <name_info><name_path>{local:path-to-node($i)}</name_path><name_value>{$i/text()}</name_value></name_info>
'
passing by value XMLParse(content xml_data) as "rdoc"
returning content
)
)
)
)
from xml_table
)
as "full_doc"
columns
id_val varchar2(4000) path '//tuple/id',
path_val varchar2(4000) path '//tuple/path',
name_val varchar2(4000) path '//tuple/name'
)
Update 3
As mentioned by @A.B.Cade in his comment, there are really simple way to join ID's with XQuery results.
Because I don't like external links in answers, code below represents his SQL fiddle, a little bit adapted to the data source from this answer:
with xmlsource as (
-- only for purpose to write long string only once
select '
<users><user><name>user1</name></user>
<user><name>user2</name></user>
<group>
<user><name>user3</name></user>
</group>
<user><name>user4</name></user>
</users>' xml_string
from dual
),
xml_table as (
-- model of xmltable
select 10 id, xml_string xml_data from xmlsource union all
select 20 id, xml_string xml_data from xmlsource union all
select 30 id, xml_string xml_data from xmlsource
)
select xd.id, x.* from
xml_table xd,
XMLTable(
'declare function local:path-to-node( $nodes as node()* ) as xs:string* {$nodes/string-join(ancestor-or-self::*/name(.), ''/'') }; for $i in $rdoc//name return <ret><name_path>{local:path-to-node($i)}</name_path>{$i}</ret> '
passing
XMLParse(content xd.xml_data
)
as "rdoc"
columns
name_path varchar2(4000) path '//ret/name_path',
name_value varchar2(4000) path '//ret/name'
) x