AI检测代码解析 CREATETABLEyour_table_history(idINTAUTO_INCREMENTPRIMARYKEY,original_idINTNOTNULL,-- 与主表的ID关联column1VARCHAR(255)NOTNULL,column2VARCHAR(255),versionINTNOTNULL,-- 版本号created_atTIMESTAMPDEFAULTCURRENT_TIMESTAMP,-- 创建时间effective_dateDATETIMEDEFAULTCURRENT_TIMESTAMP-- 有效时间)...
2.1.1 删除现在的.mysql_history文件 -bash-3.2$ rm ~/.mysql_history 2.1.2 创建它的软连接(原因后面说明) -bash-3.2$ ln -s /dev/null ~/.mysql_history 查看软连接创建成功。 -bash-3.2$ ls -al | grep mysql_ lrwxrwxrwx 1 mysql mysql 9 Apr 10 20:30 .mysql_history -> /dev/null 测试...
2.1.1 删除现在的.mysql_history文件 -bash-3.2$ rm ~/.mysql_history 1. 2.1.2 创建它的软连接(原因后面说明) -bash-3.2$ ln -s /dev/null ~/.mysql_history 1. 查看软连接创建成功。 -bash-3.2$ ls -al | grep mysql_ lrwxrwxrwx 1 mysql mysql 9 Apr 10 20:30 .mysql_history -> /dev/...
如图所示: 然后,网上查询了mysql-connecter-java的版本兼容性,发现Connector/J version 5.1是可以部分兼容MySQL 8.0的。 接着,我们对MySQL Connector/J version 5.1的小版本(从5.1.1到5.1.49)都进行了测试,发现确实是部分兼容的。其中,5.1.44 - 5.1.49版本是支持MySQL 8.0的。也就是说5.1.44之后的版本都是支持...
vim /etc/mysql/mysql.conf.d/mysqld.cnf # 16.04 version #5.修改配置文件,设置新的datadir = /databackup,并用#注销默认数据目录。 #6.修改appormor 配置(Ubuntu里面的软件都受到这个的限制),修改为:/mysqldata/ r, /mysqldata/** rwk, $sudo vim /etc/apparmor.d/user.sbin.mysqld ...
HISTORY DEFAULT PASSWORD REUSE INTERVAL DEFAULT PASSWORD REQUIRE CURRENT DEFAULT; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'HISTORY DEFAULT PASSWORD REUSE INTERVAL DEFAULT PASSWORD ...
Introduced in version 5.7.5 binlog_gtid_simple_recovery Introduced in version 5.7.6 Value parameter changes in version 5.7.7: Default is ON binlog_max_flush_queue_time Deprecated in version 5.7.9 binlog_transaction_dependency_history_size ...
数据库实例的物理文件的大小是根据系统表计算的表大小的两倍以上,原因是统计数据不准确,具体是索引数据页的数量不准确。 引言 MySQL 的统计信息中包括多个统计项,由于基于采样计算,因此存在误差,最常见的是统计项【表的行数】不准确,可能导致执行计划选择错误。
Introduced in version 8.0.11 Deprecated in version 8.0.34 audit_log_max_size Introduced in version 8.0.26 audit_log_password_history_keep_days Introduced in version 8.0.17 audit_log_policy Introduced in version 8.0.11 Deprecated in version 8.0.34 ...
operations such as undo purge. An upgrade might take a long time if there many undo records to purge. We recommend performing the upgrade only after the history list length (HLL) is low. A generally acceptable value for the HLL is 100,000 or less. For more information, see thisblog ...