RESTORE ... FROM PITR

语法说明

RESTORE ... FROM PITR 用于从之前创建的 PITR 中进行数据恢复。

语法结构

> RESTORE [CLUSTER]|[[ACCOUNT <account_name>] [DATABASE database_name [TABLE table_name]]]FROM PITR <snapshot_name> [TO ACCOUNT <account_name>];

示例

示例 2：恢复实例

CREATE database db1;
CREATE database db2;

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| db1                |
| db2                |
| information_schema |
| mo_catalog         |
| mysql              |
| system             |
| system_metrics     |
+--------------------+
7 rows in set (0.00 sec)

--创建 pitr
mysql> create pitr acc_pitr1 range 1 "h";
Query OK, 0 rows affected (0.02 sec)

mysql> show pitr;
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
| PITR_NAME | CREATED_TIME        | MODIFIED_TIME       | PITR_LEVEL | ACCOUNT_NAME                         | DATABASE_NAME | TABLE_NAME | PITR_LENGTH | PITR_UNIT |
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
| acc_pitr1 | 2024-12-17 03:17:27 | 2024-12-17 03:17:27 | account    | 0193ba05-6cd6-7bca-ba0b-60828b25xxxx | *             | *          |           1 | h         |
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
1 row in set (0.12 sec)

--过一会删除数据库 db1,db2
drop database db1;
drop database db2;

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mo_catalog         |
| mysql              |
| system             |
| system_metrics     |
+--------------------+
5 rows in set (0.01 sec)

--恢复
mysql> restore from pitr acc_pitr1 "2024-12-17 03:17:30";
Query OK, 0 rows affected (0.78 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| db1                |
| db2                |
| information_schema |
| mo_catalog         |
| mysql              |
| system             |
| system_metrics     |
+--------------------+
7 rows in set (0.00 sec)

示例 3：恢复数据库

CREATE database db1;

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| db1                |
| information_schema |
| mo_catalog         |
| mysql              |
| system             |
| system_metrics     |
+--------------------+
7 rows in set (0.00 sec)


--创建 pitr
mysql> create pitr db_pitr1 for database db1 range 2 "d";
Query OK, 0 rows affected (0.01 sec)

mysql> show pitr where pitr_name='db_pitr1';
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
| pitr_name | created_time        | modified_time       | pitr_level | account_name                         | database_name | table_name | pitr_length | pitr_unit |
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
| db_pitr1  | 2024-12-17 03:19:02 | 2024-12-17 03:19:02 | database   | 0193ba05-6cd6-7bca-ba0b-60828b25xxxx | db1           | *          |           2 | d         |
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
1 row in set (0.16 sec)

--删除数据库 db1
drop database db1;

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mo_catalog         |
| mysql              |
| system             |
| system_metrics     |
+--------------------+
6 rows in set (0.01 sec)

--恢复 db1
mysql> restore database db1 from pitr db_pitr1 "2024-12-17 03:19:10";
Query OK, 0 rows affected (0.02 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| db1                |
| information_schema |
| mo_catalog         |
| mysql              |
| system             |
| system_metrics     |
+--------------------+
7 rows in set (0.00 sec)

示例 4：恢复表

--在租户 acc1 下执行
CREATE TABLE t1(n1 int);
INSERT INTO t1 values(1);

mysql> SELECT * FROM t1;
+------+
| n1   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

create pitr tab_pitr for database db1 table t1 range 1 'd';--创建 pitr

mysql>  show pitr where pitr_name='tab_pitr';
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
| pitr_name | created_time        | modified_time       | pitr_level | account_name                         | database_name | table_name | pitr_length | pitr_unit |
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
| tab_pitr  | 2024-12-17 03:19:38 | 2024-12-17 03:19:38 | table      | 0193ba05-6cd6-7bca-ba0b-60828b25xxxx | db1           | t1         |           1 | d         |
+-----------+---------------------+---------------------+------------+--------------------------------------+---------------+------------+-------------+-----------+
1 row in set (0.13 sec)

truncate TABLE t1;--清空 t1

mysql> SELECT * FROM t1;
Empty set (0.01 sec)

restore database db1 table t1 from pitr tab_pitr "2024-12-17 03:19:40";--恢复 pitr

mysql> SELECT * FROM t1;--恢复成功
+------+
| n1   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)