I have the following XML structure:
<root>
<parent>
<parent_id>1</parent_id>
<parent_value>10000</parent_value>
<child>
<child_id>11</child_id>
<other_value>1000</other_value>
</child>
<child>
<child_id>12</child_id>
<other_value>1000</other_value>
</child>
</parent>
</root>
Expected Output:
CHILD_ID PARENT_VALUE
---------- ------------
11 10000
12 10000
What I have tried:
WITH xtbl AS (SELECT xmltype ('<root>
<parent>
<parent_id>1</parent_id>
<parent_value>10000</parent_value>
<child>
<child_id>11</child_id>
<other_value>1000</other_value>
</child>
<child>
<child_id>12</child_id>
<other_value>1000</other_value>
</child>
</parent>
</root>') AS xcol FROM dual)
SELECT myXmlTable.*
FROM xtbl
CROSS JOIN
xmltable ('/root/parent/child'
PASSING xcol
COLUMNS child_id NUMBER (5) PATH 'child_id',
parent_value NUMBER (10) PATH './parent_value') myXmlTable;
Problem with my query is that parent_value
comes to be null. Please help.
You are looking for ./parent_node
, which is a <parent_node>
under the current <child>
node. And that doesn't exist.
You just need to go up a level:
parent_value NUMBER (10) PATH './../parent_value'
Demo with your CTE and just that added ../
:
WITH xtbl AS (SELECT xmltype ('<root>
<parent>
<parent_id>1</parent_id>
<parent_value>10000</parent_value>
<child>
<child_id>11</child_id>
<other_value>1000</other_value>
</child>
<child>
<child_id>12</child_id>
<other_value>1000</other_value>
</child>
</parent>
</root>') AS xcol FROM dual)
SELECT myXmlTable.*
FROM xtbl
CROSS JOIN
xmltable ('/root/parent/child'
PASSING xcol
COLUMNS child_id NUMBER (5) PATH 'child_id',
parent_value NUMBER (10) PATH './../parent_value') myXmlTable;
CHILD_ID PARENT_VALUE
---------- ------------
11 10000
12 10000