PostgreSQL - 错误：列“id”是 uuid 类型，但表达式是整数类型

Question

I'm attempting to write some data to a PostgreSQL database using C# .NET via the ODBC driver Driver={PostgreSQL ANSI(x64)} . Does this driver have any known data type matching issues?

I'm trying to send in a GUID and a DateTime field. The database columns are typed as a uuid and a timestamp without timezone . When I attempt to send either one, I get back errors. When I send the GUID into the uuid field, I get back this error: ERROR: column "id" is of type uuid but expression is of type integer

For the datetime, I get the following: ERROR: column "createdate" is of type timestamp without time zone but expression is of type integer;

Here is some short code that illustrates the problem. This fails:

        var p = new OdbcParameter
        {
            ParameterName = "@1",
            DbType = DbType.Guid, // I also tried OdbcType = OdbcType.UniqueIdentifier
            Value = Guid.NewGuid()
        };
        var sql = "INSERT INTO mytable (id) VALUES (@1)";
        using(var conn = new OdbcConnection(_connectionString))
        {
            conn.Open();
            using (var command = new OdbcCommand(sql))
            {
                command.CommandType = CommandType.Text;
                command.Parameters.Add(p);
                command.Connection = conn;
                command.ExecuteNonQuery();
            }
        }

As a sanity check, I tried it with SQL-injection and it works:

        var sql = "INSERT INTO mytable (id) VALUES ('" + Guid.NewGuid().ToString("N") + "')";
        using (var conn = new OdbcConnection(_connectionString))
        {
            conn.Open();
            using (var command = new OdbcCommand(sql))
            {
                command.CommandType = CommandType.Text;
                command.Connection = conn;
                command.ExecuteNonQuery();
            }
        }

If I involve the date time field, I get the same results, different error message.

Is the ODBC drive mismatching something?

UPDATE

Thanks to comments below, this appears to work. I named the parameter "x" and used ? (question-mark) in the INSERT statement. It appears that the parameters are positional.

    var p = new OdbcParameter
    {
        ParameterName = "x",
        DbType = DbType.Guid,
        Value = Guid.NewGuid()
    };
    var sql = "INSERT INTO mytable (id) VALUES (?)";
    using(var conn = new OdbcConnection(_connectionString))
    {
        conn.Open();
        using (var command = new OdbcCommand(sql))
        {
            command.CommandType = CommandType.Text;
            command.Parameters.Add(p);
            command.Connection = conn;
            command.ExecuteNonQuery();
        }
    }

Answer 1

I don't think @1 is a correct name of DB parameter. Change it and try. I tried out in sqlfiddle with PostgreSQL9.3...it does not recognize @1 as a parameter, considers it as a integer.

I had this error there:

ERROR: column "data" is of type uuid but expression is of type integer Hint: You will need to rewrite or cast the expression. Position: 36