CREATE TABLE sparse_pk (
    pcol1  INT NOT NULL,
    col2 VARCHAR(200),
    pcol3 INT NOT NULL,
    PRIMARY KEY (pcol1, pcol3)
);

using iAnywhere.MobiLink.Script;
using System;
using System.IO;
using System.Data;
using System.Text;
...

// The method used for the handle_UploadData event.
public void HandleUpload(UploadData ut) {

    // Get an UploadedTableData for the sparse_pk table.
    UploadedTableData sparse_pk_table = ut.GetUploadedTableByName("sparse_pk");
 
    // Get deletes uploaded by the MobiLink client.
    UpdateDataReader data_reader = sparse_pk_table.GetInserts();

    while (data_reader.Read()) {
        data_reader.SetNewRowValues();
        StringBuilder row_str = new StringBuilder("New values ( ");
        row_str.Append(data_reader.GetString(0)); // pcol1
        row_str.Append(", ");
        if (data_reader.IsDBNull(1)) {
            row_str.Append("<NULL>");
        }
        else {
            row_str.Append(data_reader.GetString(1)); // col2
        }
        row_str.Append(", ");
        row_str.Append(data_reader.GetString(2)); // pcol3
        row_str.Append(" )");
        data_reader.SetOldRowValues();
        row_str.Append(" Old Values (");
        row_str.Append(data_reader.GetString(0)); // pcol1
        row_str.Append(", ");
        if (data_reader.IsDBNull(1)) {
            row_str.Append("<NULL>");
        }
        else {
            row_str.Append(data_reader.GetString(1)); // col2
        }
        row_str.Append(", ");
        row_str.Append(data_reader.GetString(2)); // pcol3
        row_str.Append(" )");
        writer.WriteLine(row_str);
    }
    data_reader.Close();
}