How to set SAXParser at command-line interface to create a large XML file

Question

Hi,
I am trying to create a large XML file (more than 50 MB) by selecting from Oracle database but failed because of "out of memory" error. According to "Oracle XML Developer Guide", we should use SAXParser to parsing a large XML file. But there is no example to show how to set SAXParser at command-line
Following is what I use to get xml files. It works only when the file is small.
java OracleXML getXML -DateFormat -withDTD -rowsetTag PO_HDR -conn
"jdbc:oracle:oci8:@server_name" -user "ID/password" "select * from table_name"
When I set SAXParser at the way below,
java oracle.xml.parser.v2.SAXParser OracleXML getXML -DateFormat -withDTD -rowsetTag PO_HDR -conn
"jdbc:oracle:oci8:@server_name" -user "ID/password" "select * from table_name"
it failed with the error message: "In class oracle.xml.parser.v2.SAXParser: void main(String argv[]) is not defined"
Does anyone know how to solve the problem? I'll be appreciated very much for your help.
Yi

Answer 1

here are my ideas.
register the xml schema.
using xmldom, generate the desired xml output and return as xmltype.
then you can use something like this to check.
declare
xmldoc xmltype ;
begin
   -- populate xmldoc from you xmldom function
   -- validate against XML schema
   xmldoc.isSchemaValid(schema_url, root_element);
   if xmldoc.isSchemaValid = 1 then
        --valid schema
   else
        --invalid
   end if;
end