SELECT host, ts, cpu
FROM t_last_row_append_mode
ORDER BY host, ts, cpu;

+-------+-------------------------+------+
| host  | ts                      | cpu  |
+-------+-------------------------+------+
| host1 | 1970-01-01T00:00:00     | 10.0 |
| host2 | 1970-01-01T00:00:00.001 | 20.0 |
+-------+-------------------------+------+

ALTER TABLE t_last_row_append_mode SET 'append_mode' = 'true';

Affected Rows: 0

SHOW CREATE TABLE t_last_row_append_mode;

+------------------------+-------------------------------------------------------+
| Table                  | Create Table                                          |
+------------------------+-------------------------------------------------------+
| t_last_row_append_mode | CREATE TABLE IF NOT EXISTS "t_last_row_append_mode" ( |
|                        |   "host" STRING NULL,                                 |
|                        |   "ts" TIMESTAMP(3) NOT NULL,                         |
|                        |   "cpu" DOUBLE NULL,                                  |
|                        |   TIME INDEX ("ts"),                                  |
|                        |   PRIMARY KEY ("host")                                |
|                        | )                                                     |
|                        |                                                       |
|                        | ENGINE=mito                                           |
|                        | WITH(                                                 |
|                        |   append_mode = 'true'                                |
|                        | )                                                     |
+------------------------+-------------------------------------------------------+

INSERT INTO t_last_row_append_mode VALUES
('host1', 0, 100.0),
('host2', 1, 200.0);

Affected Rows: 2

SELECT host, ts, cpu
FROM t_last_row_append_mode
ORDER BY host, ts, cpu;

+-------+-------------------------+-------+
| host  | ts                      | cpu   |
+-------+-------------------------+-------+
| host1 | 1970-01-01T00:00:00     | 10.0  |
| host1 | 1970-01-01T00:00:00     | 100.0 |
| host2 | 1970-01-01T00:00:00.001 | 20.0  |
| host2 | 1970-01-01T00:00:00.001 | 200.0 |
+-------+-------------------------+-------+