辅助 database

dabase(xxx_dba)

mysql> desc events;
+----------------------+---------------+------+-----+---------------------+-------+
| Field                | Type          | Null | Key | Default             | Extra |
+----------------------+---------------+------+-----+---------------------+-------+
| EVENT_CATALOG        | varchar(64)   | NO   |     |                     |       |
| EVENT_SCHEMA         | varchar(64)   | NO   |     |                     |       |
| EVENT_NAME           | varchar(64)   | NO   |     |                     |       |
| DEFINER              | varchar(77)   | NO   |     |                     |       |
| TIME_ZONE            | varchar(64)   | NO   |     |                     |       |
| EVENT_BODY           | varchar(8)    | NO   |     |                     |       |
| EVENT_DEFINITION     | longtext      | NO   |     | NULL                |       |
| EVENT_TYPE           | varchar(9)    | NO   |     |                     |       |
| EXECUTE_AT           | datetime      | YES  |     | NULL                |       |
| INTERVAL_VALUE       | varchar(256)  | YES  |     | NULL                |       |
| INTERVAL_FIELD       | varchar(18)   | YES  |     | NULL                |       |
| SQL_MODE             | varchar(8192) | NO   |     |                     |       |
| STARTS               | datetime      | YES  |     | NULL                |       |
| ENDS                 | datetime      | YES  |     | NULL                |       |
| STATUS               | varchar(18)   | NO   |     |                     |       |
| ON_COMPLETION        | varchar(12)   | NO   |     |                     |       |
| CREATED              | datetime      | NO   |     | 0000-00-00 00:00:00 |       |
| LAST_ALTERED         | datetime      | NO   |     | 0000-00-00 00:00:00 |       |
| LAST_EXECUTED        | datetime      | YES  |     | NULL                |       |
| EVENT_COMMENT        | varchar(64)   | NO   |     |                     |       |
| ORIGINATOR           | bigint(10)    | NO   |     | 0                   |       |
| CHARACTER_SET_CLIENT | varchar(32)   | NO   |     |                     |       |
| COLLATION_CONNECTION | varchar(32)   | NO   |     |                     |       |
| DATABASE_COLLATION   | varchar(32)   | NO   |     |                     |       |
+----------------------+---------------+------+-----+---------------------+-------+
24 rows in set (0.00 sec)

mysql> desc heartbeat;
+-------+--------------+------+-----+---------+-------+
| Field | Type         | Null | Key | Default | Extra |
+-------+--------------+------+-----+---------+-------+
| id    | varchar(255) | NO   | PRI |         |       |
| value | int(11)      | YES  |     | NULL    |       |
+-------+--------------+------+-----+---------+-------+
2 rows in set (0.00 sec)

1 events

2 heartbeat

value 是时间戳，如 1758294704(2025-09-19 23:11:44)