| id | int(10) unsigned | NO | PRI | NULL | auto_increment | | name | varchar(100) | NO | | NULL | | | time | date | YES | | NULL | | | scores | int(11) | NO | | NULL | | | country | varchar(30) | YES | | NULL | | +---+---+---+---+---+---+ ...
1.环境准备 主库:192.168.137.4 mytest3 从库:192.168.137.5 mytest4 MySQL: 8.0.32 2.配置 ReplicaSet 实例 启动 mysql shell # mysqlsh --uri root@localhost --socket=/abce
because in this case the higher MySQL layer does not know about row-level locks, it is possible to get a table lock on a table where another session currently has row-level locks. However, this does not endanger transaction integrity. ...
to the database with no errors.)How to repeat:Definition of table `test_table` in mySQL: --- CREATE TABLE `test_table` ( `i1` int(10) unsigned NOT NULL, `i2` int(10) unsigned NOT NULL, PRIMARY KEY (`i1`,`i2`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; --- Java file Main....
第一种方式:jdbc:mysql://192.168.5.240:3306/turbo_2?useCursorFetch=true&defaultFetchSize=4 只需要配置url附带一些参数就行。所有的statement都会使用游标方式 第二种方式:url参数配置jdbc:mysql://192.168.5.240:3306/turbo_2?useCursorFetch=true 代码中配置stmt.setFetchSize(大于0的参数) ...
为了解决这个问题,mysql8.0.1引入了基于WriteSet的复制。 「第二部分 原理」 LOGICAL CLOCK由两部分组成,分别是commit parent和sequence number。commit parent表示当前事务所依赖的事务的序号,只有依赖的事务完成后当前事务才能进行。WriteSet是一种更细粒度的事务冲突检测手段,它是在LOGICAL CLOCK的基础上,对事务的...
In this mode, MySQL Router directs application traffic, both writes and reads, to the cluster in the InnoDB ClusterSet deployment that is currently the primary cluster. This mode is the default. Named target cluster In this mode, MySQL Router directs application traffic to the InnoDB Cluster ...
The return value is the error number. Typically, the other callbacks store the error message in the data structure pointed to byptr, so thatlocal_infile_error()can copy the message from there intoerror_msg. After callingmysql_set_local_infile_handler()in your C code and passing pointers to...
JSON_SET() Inserts or updates data in a JSON document and returns the result. Returns NULL if any argument is NULL or path, if given, does not locate an object. Meaning MySQL can add$.test2, but since$.test2is not an object, MySQL can not add on to$.test2.test3. ...
80016 DEFAULT ENCRYPTION='N' */ If a client (like .NET apparently) does some metadata checks when it connects, it could get confused by the new name for utf8. Ideally, the next step of migrating MySQL Server 8.0 to utf8mb4 should be to change the system character set, and any other...