XML as CLOB parameter to procedure

Question

I'm trying to insert data from an XML file into tables/columns via a stored procedure. The procedure is part is as follows:
create or replace procedure ParseSomeXMLTest
xmlDoc in CLOB, someID out int
as
doc xmldom.DOMDocument;
parser xmlparser.Parser;
begin
parser := xmlparser.newParser;
xmlparser.parseClob(parser, xmlDoc);
doc := xmlparser.getDocument(parser);
xmlparser.freeParser(parser);
When I call parseClob I get an ORA-20100 error complaining about the syntax of the XML file. If I cut my XML down to < 32K it works just fine.
If I write the CLOB to disk, read it out again and process it, it also works, as follows:
create or replace procedure ParseSomeXMLTest
xmlDoc in CLOB, someID out int
as
doc xmldom.DOMDocument;
parser xmlparser.Parser;
test CLOB;
begin
insert into junk values(xmlDoc);
commit;
select xmldata into test from junk;
delete from junk;
commit;
parser := xmlparser.newParser;
xmlparser.parseClob(parser, test);
doc := xmlparser.getDocument(parser);
xmlparser.freeParser(parser);
The problem is that it's entirely too slow to insert the CLOB, select it back out again and delete it. It takes around 4 seconds to do that. It takes me less than 1 second to actually process the XML once it's parsed. Increasing my process by 4x isn't an option.
Since the parseClob works on a "CLOB" I can only assume that I'm not truly passing in a CLOB from my C++/C# applications. I've used both the ODP.NET and the Microsoft's Oracle .NET provider in C# and the Oracle OLEDB provider in C++.
Here's a sample of my C# code:
OracleConnection connect = new OracleConnection("Data Source=ds;user id=UID;password=PWD;");
connect.Open();
OracleCommand insCmd = new OracleCommand("ParseSomeXMLTest", connect);
insCmd.CommandType = CommandType.StoredProcedure;
OracleParameter param = insCmd.Parameters.Add("xmlDoc", OracleDbType.Clob);
param.Direction = ParameterDirection.Input;
StreamReader reader = File.OpenText("c:\\oracletest.xml");
param.Value = reader.ReadToEnd();
OracleParameter param2 = insCmd.Parameters.Add("someID", OracleDbType.Int32);
param2.Direction = ParameterDirection.Output;
insCmd.ExecuteNonQuery();
long id = Convert.ToInt32(param2.Value);
Anyone have any ideas?

Answer 1

Hey!
I'm using the samme stuff ... while calling from .NET (c#) , it give me the error.
"Wrong number of arguments"...
     oraconn.Open();
                         // Create a oracle Command
                         OracleCommand oCmd = new OracleCommand();
                         oCmd.CommandType = CommandType.StoredProcedure;
                         oCmd.CommandText ="sp_CV_InsertXmldetails";
                         oCmd.Connection = oraconn;
                         OracleParameter inputParam;
                         inputParam =oCmd.Parameters.Add("param_xml",System.Data.OracleClient.OracleType.Clob);
                         inputParam.Direction = ParameterDirection.Input;
                         StreamReader rd1 = File.OpenText("c:\\clob.xml");
                         inputParam.Value = rd1.ReadToEnd();
                         oCmd.ExecuteNonQuery();
In the Sp
create or replace sp_CV_InsertXmldetails(param_xml in clob)
AS
BEGIN
// xml parsing stuf
END