CHANGE DRAINER

    语句用于修改集群中 Drainer 的状态信息。

    1. +----------|----------------|--------|--------------------|---------------------|
    2. |  NodeID  |     Address    | State  |   Max_Commit_Ts    |    Update_Time      |
    3. +----------|----------------|--------|--------------------|---------------------|
    4. | drainer1 | 127.0.0.3:8249 | Online | 408553768673342532 | 2019-04-30 00:00:03 |
    5. | drainer2 | 127.0.0.4:8249 | Online | 408553768673345531 | 2019-05-01 00:00:04 |
    7. 2 rows in set (0.00 sec)
    1. Query OK, 0 rows affected (0.01 sec)
    2. |  NodeID  |     Address    | State  |   Max_Commit_Ts    |    Update_Time      |
    3. +----------|----------------|--------|--------------------|---------------------|
    4. +----------|----------------|--------|--------------------|---------------------|
    5. | drainer2 | 127.0.0.4:8249 | Online | 408553768673345531 | 2019-05-01 00:00:04 |
    6. +----------|----------------|--------|--------------------|---------------------|

    该语句是 TiDB 对 MySQL 语法的扩展。