Length restriction for clob-elements?

Question

Hi all,
I am working with the Oracle Thick-Client (Oracle9i Enterprise Edition Release 9.2.0.6.0). I am using JDBC together with the Oracle XML DB (UTF-8).
My table is validated against an xsd-schema. The element <content> (see below) causes problems if I try to fill in a long string (over 8000 characters). The client somehow cuts the string off at an arbitrary position without producing an error. But it cuts off some characters.
Any ideas what could be my problem?
XSD:
<xs:schema xmlns:xdb="http://xmlns.oracle.com/xdb" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="content" type="xs:string" xdb:SQLType="CLOB"/>
<xs:element name="title" type="xs:string"/>
<xs:element name="url" type="xs:anyURI"/>
<xs:element name="netpage" xdb:SQLType="NETPAGE_T">
          <xs:complexType>
               <xs:sequence>
                    <xs:element ref="title" xdb:SQLName="TITLE"/>                    
                    <xs:element ref="url" xdb:SQLName="URL"/>
                    <xs:element ref="content" xdb:SQLName="CONTENT"/>
               </xs:sequence>
               <xs:attribute name="no-content" type="xs:string" use="required" xdb:SQLName="A_NO_CONTENT"/>
               <xs:attribute name="pageID" type="xs:long" use="required" xdb:SQLName="A_PAGE_ID"/>
               <xs:attribute name="projectID" type="xs:long" use="required" xdb:SQLName="A_PROJECT_ID"/>
               <xs:attribute name="type" type="xs:string" use="required" xdb:SQLName="A_TYPE"/>
     </xs:complexType>
</xs:element>
</xs:schema>
The java-code to insert the document is:
private void doInsertDocument(Document doc, String table) throws SQLException {
          PreparedStatement stmt = null;
          String documentString;
          documentString = XMLUtility.formatedPrintDoc(doc, "UTF-8");
          synchronized (key) {
               try {
                    stmt = databaseConnection.prepareStatement("INSERT INTO " + table
                              + " VALUES (?)");
                    XMLType xmltype = null;                    
                    xmltype = XMLType.createXML(databaseConnection, documentString);
                    stmt.setObject(1, xmltype, XMLType._SQL_TYPECODE);                    
                    stmt.execute();
               } catch (SQLException e) {
                    throw e;
               } finally {
                    try {
                         stmt.close();
                    } catch (RuntimeException re) {
                         re.printStackTrace();
                    } catch (Exception e) {
                         e.printStackTrace();
Any help would be appreciated.
thanks
emil

Answer 1

I think you need to try something like this...
      OracleCallableStatement  statement = null;
      String statementText;
      CLOB    clob = CLOB.createTemporary( getConnection(), true, CLOB.DURATION_SESSION);
      statementText = "insert into " + this.getSetting(this.TABLE_NAME) + " values(xmltype(:1))";
      System.out.println("GetXMLType.doSomething : Driver Type = " + this.getDriver() + ". Statement = " + statementText);
      statement = (OracleCallableStatement) getConnection().prepareCall(statementText);
      InputStream is = new FileInputStream(getSetting(this.SOURCE_FILE));
      InputStreamReader reader = new InputStreamReader( is );
      Writer writer = clob.setCharacterStream(0);
      char [] buffer = new char [ clob.getChunkSize() ];
      for( int charsRead = reader.read( buffer );
      charsRead > - 1;
      charsRead = reader.read( buffer ) )
         writer.write( buffer, 0, charsRead );
      writer.close();
      reader.close();
      statement.setCLOB(1,clob);
      boolean result = statement.execute();
      is.close();
      CLOB.freeTemporary(clob);
      statement.close();
      getConnection().commit();
      getConnection().close();
  }