How to read data with different XML schemas within the single connection?

Question

I have Oracle 11g database
I access it through jdbc:oracle:thin, version 11.2.0.3, same as xdb.
I have several tables, each has one XMLType column, all schema-based.
There are three different XML schemata registered in the DB
I may need to read the XML data from several tables.
If all the XMLTypes have the same XML schema ,there is no problem,
If the schemata are different, the second read throws BindXMLException.
If I reset the connection between the reads of the XMLType column with different schemata, it works.
The question is: how can I configure the driver, or the connection to be able to read the data with different XML schemata without resetting the connection (which is expensive).
The code to get the XMLType data is textbook implementation:
1   ResultSet resultSet = statement.executeQuery( sql ) ;
2   String result = null ;
3    while(resultSet.next()) {
4   SQLXML sqlxml = resultSet.getSQLXML(1) ;
5   result = sqlxml.getString() ;
6   sqlxml.free();
7   }
8   resultSet.close();
9    return result ;

Answer 1

It turns out, that I needed to serialize the XML on the server and read it as Blob. Like this:
1    final Statement statement = connection.createStatement() ;
2    final String sql = String.format("select xmlserialize(content xml_content_column as blob encoding 'UTF-8') from %s where key='%s'", table, key ) ;
3   ResultSet resultSet = statement.executeQuery( sql ) ;
4   String result = null ;
5    while(resultSet.next()) {
6   Blob blob = resultSet.getBlob( 1 );
7   InputStream inputStream = blob.getBinaryStream();
8   result = new Scanner( inputStream ).useDelimiter( "\\A" ).next();
9   inputStream.close();
10   blob.free();
11   }
12   resultSet.close();
13   statement.close();
14
15   System.out.println( result );
16    return result ;
17
Then it works. Still, can't get it work with XMLType in resultset.On the client unwrapping XML blows up when trying to switch to different XML schema. JDBC/XDB problem?