Question

I’m trying to send a XML of aproximately 1MB as XML parameter in a Stored Procedure, but always the connection returns timeout.

Anyone knows what’s the size limit for the XML type?

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Environment:

• Microsoft SQL Server 2005 Express
• .NET Framework 2.0
• C#

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C# Code:

using (SqlCommand commandSave = new SqlCommand("SaveScanning", this.DatabaseConnection))
{
    commandSave.CommandType = System.Data.CommandType.StoredProcedure;

    SqlParameter scanningData = new SqlParameter("ScanningData", System.Data.SqlDbType.Xml);
    scanningData.Value = new SqlXml(new XmlTextReader(**HEREISTHEXMLSTRING**, XmlNodeType.Document, null));
    commandSave.Parameters.Add(scanningData);

    commandSave.ExecuteNonQuery();
}

SQL Code:

CREATE PROCEDURE [dbo].[SaveScanning]
(
    @ScanningData XML
)
AS
BEGIN
    .
    .
    .

Answer 1

Finally I found a solution:

The OPENXML “function” to read XML it’s so far the best way.

CREATE PROCEDURE InsertXMLData
(
    @XMLDoc XML
)
AS

---

Faster way:

DECLARE @handle INT

EXEC sp_xml_preparedocument @handle OUTPUT, @XMLDoc

INSERT INTO TestTable
SELECT * FROM OPENXML (@handle, '/authors', 2) WITH 
  (au_id INT,
   au_lname VARCHAR(20),
   au_fname VARCHAR(20)
  )
EXEC sp_xml_removedocument @handle

Very slow way:

INSERT INTO TestTable
SELECT
    x.item.value('@au_id', 'INT') AS au_id,
    x.item.value('@au_lname', 'VARCHAR(20)') AS au_lname
    x.item.value('@au_fname', 'VARCHAR(20)') AS au_fname
FROM
    @XMLDoc.nodes('/authors') x(item)