VOID(pthread_mutex_lock(&LOCK_open)); error= mysql_rm_table_part2(thd, tables, if_exists, drop_temporary, 0, 0); pthread_mutex_unlock(&LOCK_open); 1. 2. 3. 这整段删除表操作的代码都被LOCK_open互斥信号量所包围。这个互斥信号量在MySQL中不少地方都用到过,但主要是表在开启或关闭的时候。
昨天晚上接到一个网络服务请求,由于不小心点击了自己产品软件上面的清空数据功能(这个工具确实需要小心,在Oracle恢复案例中,也有xx企业erp该功能导致数据被删除请求恢复),导致MySQL数据库被直接drop database掉了,之前没有做任何备份,只是发生故障之后,他们立即封存现场,备份出来了ibdata1文件。接到请求之后,通过让其把i...
READ ONLY允许用于 ALTER DATABASE,但不允许用于 CREATE DATABASE。对于只读数据库,由SHOW CREATE DATABASE语句得到的输出,在注释中会包含 READ ONLY=1,以指示其只读状态。 drop database if exists jack; create datab...
Am I correct in assuming that this data lives in /var/lib/mysql/? Or does innodb data live next to the myisam tables? If that is where this data resides, I don't know what happens to the innodb files when a drop database command is issued. I'm assuming that the 1GB ibdata1 ...
MySQL Drop Database To drop a database in MySQL, you also use the Drop Database command: DROP{DATABASE|SCHEMA}[IFEXISTS]db_name; This command allows you to use either the Database or Schema keyword. Schema is a synonym for the word “database” in this command, so they both do the...
undrop-for-innodb 是针对 MySQL innodb 的数据恢复工具,本文主要介绍在无备份、无binlog等场景下,如何恢复drop table的表数据。 步骤: 1.模拟误删除(droptable);2.安装、编译undrop-for-innodb工具;3.扫描mysql数据文件所在磁盘;4.扫描ibdata文件;5.生成字典表;6.恢复表结构;7.恢复表数据; ...
Step #1: Open Command Line Open your terminal or command prompt. Step #2: Log In to MySQL Type in the command to log in to your MySQL server using your username and password. For example: mysql -u your_username -p Step #3: Select Database ...
Data Definition: CREATE, DROP, ALTER CREATE DATABASE Syntax CREATE DATABASE [IF NOT EXISTS] db_name CREATE DATABASE creates a database with the given name. Rules for allowable database names … - Selection from MySQL Reference Manual [Book]
mysql performance_schema Phpadmin Registration Student student_1 Testdb WordPress World Example 1:Write a query to remove the cricket name database from the SQL Server. DROP DATABASE Cricket; In the above DROP DATABASE query example, we remove the cricket database name from the SQL Server. ...
Category:MySQL Server: Command-line ClientsSeverity:S3 (Non-critical) Version:5.1.29OS:Windows Assigned to:CPU Architecture:Any [3 Nov 2008 14:00] Scott Noyes Description:If the mysqldump output includes a DROP DATABASE statement, then loading that SQL back into the server while using the --...