YltProject/操作文档/7、Mysql数据库下载与还原.md

## 云数据库 RDS

4.07GB
5.7
hins25487844_data_20240730052418_qp.xb
还原办法：
https://www.alibabacloud.com/help/zh/rds/apsaradb-rds-for-mysql/restore-the-data-of-an-apsaradb-rds-for-mysql-instance-from-a-physical-backup-file-to-a-self-managed-mysql-database

### 开始还原
cd /usr/local

因为备份文件太大，无法使用rz -be,所以选择sftp上传  hins25487844_data_20240730052418_qp.xb

#### 解包

```
mkdir /var/mysql_bkdata/ -p
cat hins25487844_data_20240730052418_qp.xb | xbstream -x -v -C /var/mysql_bkdata/
innobackupex --decompress --remove-original /var/mysql_bkdata/
```


#### 恢复前准备
```
innobackupex --defaults-file=/var/mysql_bkdata/backup-my.cnf --apply-log /var/mysql_bkdata/
```

#### 编辑数据库配置文件

```
mkdir /var/mysql_newdata -p

vi /etc/my.cnf

# 修改

datadir = /var/mysql_newdata
```



**参数innodb_undo_tablespaces的取值需要与/var/mysql_bkdata/backup-my.cnf中的取值相同，您可以使用下面的命令来查询。**

```
cat /var/mysql_bkdata/backup-my.cnf | grep innodb_undo_tablespaces
```



#### 添加
>这个值不是乱写的，是根据上面的查询命令获取到的

```
[mysqld]
innodb_undo_tablespaces=0 
innodb_undo_directory= /var/mysql_newdata
```



#### 恢复数据

```
innobackupex --defaults-file=/etc/my.cnf --copy-back /var/mysql_bkdata/
```

#### 修改
```
vi /etc/my.cnf
```

#### 增加

```
[mysqld]
lower_case_table_names=1
```

#### 授权
```
chown -R mysql:mysql  /var/mysql_newdata
```



#### 启动

```
mysqld --defaults-file=/etc/my.cnf --user=mysql --datadir=/var/mysql_newdata &
```



------------------------------------------------------------------------------------------------------------

#### 重置密码

```
/etc/init.d/mysqld stop

mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
mysql
update mysql.user set authentication_string=PASSWORD("DsideaL147258369") where user='root' and host='localhost';

flush privileges;

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY 'DsideaL147258369' WITH GRANT OPTION; 

flush privileges;
exit

/etc/init.d/mysqld restart
mysql -uroot -pDsideaL147258369
```



> Mysql5.7修改用户密码，报错“Unknown trigger has an error in its body: ‘Unknown system variable ‘maintain_user”

>  https://www.cnblogs.com/perfectCats/p/17979389



```
mysql> select trigger_schema,trigger_name from information_schema.triggers;
+----------------+----------------------------+
| trigger_schema | trigger_name |
+----------------+----------------------------+
| sys | sys_config_insert_set_user |
| sys | sys_config_update_set_user |
+----------------+----------------------------+
2 rows in set (0.03 sec)
mysql> drop trigger sys.sys_config_insert_set_user;
Query OK, 0 rows affected (0.06 sec)

mysql> drop trigger sys.sys_config_update_set_user;
Query OK, 0 rows affected (0.02 sec)

[root@RockyLinux local]# mv /var/mysql_newdata/mysql/user.TRG /var/mysql_newdata/mysql/user.TRG.back
[root@RockyLinux local]# mv /var/mysql_newdata/mysql/proxies_priv.TRG /var/mysql_newdata/mysql/proxies_priv.TRG.back
```





>MySQL SQL报错-ERROR 1105 (HY000): Unknown error-存储过程/事件

>  https://www.modb.pro/db/518258

```
# Mysql ERROR 1067: Invalid default value for 字段

https://blog.csdn.net/qq_26245325/article/details/78916363

use mysql;

ALTER TABLE `mysql`.`proc` ENGINE = MyISAM;
ALTER TABLE `mysql`.`event`  ENGINE = MyISAM;
ALTER TABLE `mysql`.`func`  ENGINE = MyISAM;
```