Disables the Group Replication member actionmysql_disable_super_read_only_if_primaryso thatsuper_read_onlyremains set on the primary of the cluster after a view change. Enables the Group Replication member actionmysql_start_failover_channels_if_primaryso that asynchronous connection failover for repli...
As of this release, dba.reboot_cluster_from_complete_outage() enables super_read_only on the primary member and disables the Group Replication action mysql_disable_super_read_only_if_primary. (Bug #36562916) If an attempt to create a Replica Cluster failed due to a timeout and the revert ...
service varchar(10) NOT NULL, method varchar(50) NOT NULL, calls int NOT NULL, items int NOT NULL, time float NOT NULL, cost decimal(9,5) NOT NULL, updated datetime, PRIMARY KEY (day, account, service, method) ) ENGINE=InnoDB; 该...
The incremental state recovery may be safely used if you are sure all updates ever executed in the cluster were done with GTIDs enabled, there are no purged transactions and the new instance contains the same GTID set as the cluster or a subset of it. To use this method by default, set...
super_read_only设置仅允许复制写入,是运行副本的最安全方式。 使用基于行的复制或确定性语句 尽管在某些情况下会使用更多的磁盘空间,基于行的复制是复制数据最一致的方式。这是因为它包含了每个条目的确切行数据更改。 在基于语句的复制中考虑以下内容: DELETE FROM users WHERE last_login_date <= NOW() LIMIT ...
DISABLE DISCARD DISK DISTINCT(右) DISTINCTROW(右) DIV(右) DO DOUBLE(右) DROP(右) DUAL(右) DUMPFILE DUPLICATE DYNAMIC 乙 EACH(右) ELSE(右) ELSEIF(右) EMPTY(R); 8.0.4 新增(保留) ENABLE ENCLOSED(右) ENCRYPTION END ENDS ENFORCED; 在 8.0.16 中添加(非保留) ...
Handler_read_first:读取索引的第一个值,该值越大,代表涉及索引全扫描的查询越多。 Handler_read_last:和 Handler_read_first 相反,是读取索引的最后一个值。 若该值增大,基本上可以判定查询中使用了基于索引的 ORDER BY DESC 子句。 Handler_read_next:根据索引的顺序来读取下一行的值,常用于基于索引的范围扫描...
If you have a group with 5.7 members you can add a 8.0 member, but it remains in read-only mode. Writing to this member is dangerous while the group contains multiple server versions and should be avoided. In a single-primary group, if the current primary leaves the group and a new pr...
关键字是在SQL中具有重要意义的单词。某些关键字,如SELECT, DELETE或 BIGINT,被保留,需要用作标识符,例如表和列名特殊待遇。内置函数的名称也可能如此。允许使用非保留关键字作为标识符而无需引用。
简介:所有规范会按照【高危】、【强制】、【建议】三个级别进行标注,遵守优先级从高到底。 一、数据库规范 所有规范会按照【高危】、【强制】、【建议】三个级别进行标注,遵守优先级从高到底。 1 设计规范 1.1 建库规范 【强制】:库的名称必须控制在32个字符以内 ...