#460 [ADO.NET] CUBRIDDataAdapter.Update() does not work

[Jira Trac]

Because there is a property named CUBRIDDataAdapter.UpdateCommand, I think the CUBRIDDataAdapter.Update() may work in this way:
(1) prepare data:
create table t (id int, name varchar(100));
insert into t values (1, 'Nancy');

(2) fill data table
string sql = select * from t;
CUBRIDCommand cmd = new CUBRIDCommand(sql, conn);
adapter.SelectCommand = cmd;
DataTable dt = new DataTable(student);
adapter.Fill(dt);

(3) update the data table
sql = update t set name='Mandy' where id=1;
cmd = new CUBRIDCommand(sql, conn);
adapter.UpdateCommand=cmd;
adapter.Update(dt);

Expected Results:
The data table is updated

Actual results:
The data table is not updated

If the test case is wrong, then how to use the property CUBRIDDataAdapter.UpdateCommand? What is it designed for?