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https://dev.mysql.com/doc/refman/8.0/en/window-functions-frames.html
MySQL permits a frame clause for such functions but ignores it. (For details about the permitted units specifiers, see the description of the DATE_ADD() function in Section 14.7, “Date and Time Functions”.) RANGE on a numeric or temporal expr ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-legacy-filtering.html
Legacy Mode Audit Log Filtering is deprecated as of MySQL 8.0.34. Legacy Event Filtering by Account Legacy Event Filtering by Status Legacy Event Filtering by Account To filter audited events based on the originating account, set one (not both) of ... Note This section describes legacy audit log filtering, which applies if the audit_log plugin is installed without the accompanying audit tables and functions needed for rule-based ...
https://dev.mysql.com/doc/refman/8.0/en/engine-condition-pushdown-optimization.html
For example, in a my.cnf file, use these lines: [mysqld] optimizer_switch=engine_condition_pushdown=off At runtime, disable condition pushdown like this: SET optimizer_switch='engine_condition_pushdown=off'; Limitations. Filtering can be also ...
https://dev.mysql.com/doc/refman/8.0/en/enum.html
An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time. This means that you can use the following SELECT statement to find rows into which ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-consistency-guarantees.html
Transactions whose consistency level is not EVENTUAL hold execution until a timeout, configured by wait_timeout value is reached, which defaults to 8 hours. A transaction cannot be on-hold forever, and if the time held exceeds wait_timeout it ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-primary-secondary-replication.html
Traditional MySQL Replication provides a simple source to replica approach to replication. Figure 20.1 MySQL Asynchronous Replication There is also semisynchronous replication, which adds one synchronization step to the protocol. This means that ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-page-compression.html
Hole punching size is the NTFS compression unit, which is 16 times the NTFS cluster size. Before downgrading to an earlier version of MySQL that does not support page compression, uncompress the tables that use the page compression feature. InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-purge-configuration.html
From MySQL 8.0.26, if the innodb_max_purge_lag setting is exceeded, purge work is automatically redistributed among available purge threads. When the purge lag exceeds the innodb_max_purge_lag threshold, a delay is imposed on INSERT, UPDATE, and ...
https://dev.mysql.com/doc/refman/8.0/en/ndb-restore-different-number-nodes.html
Note When changing the total number of LCP threads or LQH threads per node group, you should recreate the schema from backup created using mysqldump. $> mysqldump --no-data --routines --events --triggers --databases > myschema.sql Important Once you ... It is possible to restore from an NDB backup to a cluster having a different number of data nodes than the original from which the backup was ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-build-configuration.html
\ -DDISABLE_PSI_STAGE=1 \ -DDISABLE_PSI_STATEMENT=1 For more information, see the descriptions of the DISABLE_PSI_XXX CMake options in Section 2.8.7, “MySQL Source-Configuration Options”. If you install MySQL over a previous installation that ...