throws Exception {
AlphanumericDataSource d = (AlphanumericDataSource) ds
.getDataSource(dsName);
Value v1 = ValueFactory.createValue("freestyle");
Value v2 = ValueFactory.createValue(9);
d.beginTrans();
int lastField = d.getDataSourceMetadata().getFieldCount();
d.deleteRow(0);
d.setFieldValue(0, 2, v1);
d.addField("nuevo", type);
d.setFieldValue(0, lastField, v2);