Get a table from XML with unknown number of columns

Question

Guys, I'm looking if it is possible to get the following result:
imagine I have an XML like one of the following (it doesn't matter which one, I just give a few examples for you to have a choice). The main idea, that there are described several columns and values for 1 row of these columns, e.g.:
SQL> with t as (select
  2  ' <column>
  3    <name>col1</name>
  4    <value>100</value>
  5   </column>
  6   <column>
  7    <name>col2</name>
  8    <value>200</value>
  9   </column>' xml from dual union all
10             select
11  ' <column>col1
12     <value>100</value>
13    </column>
14    <column>col1
15     <value>100</value>
16    </column>' from dual union all
17             select
18  '<col1>100</col1>
19  <col2>200</col2>' from dual)
20             --
21             select * from t
22  /
XML
<column>
  <name>col1</name>
  <value>100</value>
</column>
<column>
  <name>col2</name>
  <value>200</value>
</column>
<column>col1
   <value>100</value>
  </column>
  <column>col1
   <value>100</value>
  </column>
<col1>100</col1>
<col2>200</col2>
SQL> I want to get the following result from this XML:
      COL1       COL2
       100        200So the main idea here is that the number of columns can vary - it is not fixed.
So it is quite similar to dynamic SQL.
Is it possibe with XML?

Answer 1

The only general way to get a flexible amount of columns I know of is to use table functions returning anydataset.
It should be rather straightforward to pass in a xml document and return its tablestructure respectivly (though the »structure« of the xml must be fixed).
Would that be an acceptable way of doing this?