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https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-limitations.html
The following limitations apply to online DDL operations: The table is copied when creating an index on a TEMPORARY TABLE. Tables created before MySQL 5.6 that include temporal columns (DATE, DATETIME or TIMESTAMP) and have not been rebuilt using ...The ALTER TABLE clause LOCK=NONE is not permitted if there are ON...CASCADE or ON...SET NULL constraints on the ...When the DML operations are applied, it is possible to encounter a duplicate key entry error (ERROR 1062 (23000): ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-directory.html
If a DATA DIRECTORY or INDEX DIRECTORY table option is used in a CREATE TABLE statement on the source server, the table option is also used on the replica. This can be overridden by using the NO_DIR_IN_CREATE server SQL mode on the replica, which ...This can cause problems if no corresponding directory exists in the replica host file system or if it exists but is not accessible to the replica MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/known-issues.html
Creation of a table of type MERGE does not check whether the underlying tables are compatible types. Even if you use lower_case_table_names=2 (which enables MySQL to remember the case used for databases and table names), MySQL does not remember the ... This section lists known issues in recent versions of ...
https://dev.mysql.com/doc/refman/8.0/en/bug-reports.html
If a database table is related to the problem, include the output from the SHOW CREATE TABLE db_name.tbl_name statement in the bug report. You should also include the output from SHOW CREATE TABLE tbl_name for each table that is involved. If you ...
https://dev.mysql.com/doc/refman/8.0/en/programs-overview.html
mysqladmin A client that performs administrative operations, such as creating or dropping databases, reloading the grant tables, flushing tables to disk, and reopening log files. This program creates the SSL certificate and key files and RSA ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-reference.html
Audit Log Tables MySQL Enterprise Audit uses tables in the mysql system database for persistent storage of filter and user account data. The tables can be accessed only by users who have privileges for that database. If these tables are missing, the ...Unless those objects are installed, the audit_log plugin operates in legacy mode (deprecated in MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-ddl.html
You can access the underlying InnoDB table (which is test.demo_test by default) through standard SQL interfaces. However, there are some restrictions: When querying a table that is also accessed through the memcached interface, remember that ...If ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cluster-operations.html
The cluster_operations table provides a per-operation (stateful primary key op) view of all activity in the NDB Cluster from the point of view of the local data management (LQH) blocks (see The DBLQH Block). (If the MySQL Server is running with ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-config-params.html
The config_params table is a static table which provides the names and internal ID numbers of and other information about NDB Cluster configuration parameters. This table can also be used in conjunction with the config_values table for obtaining ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-diskpagebuffer.html
The diskpagebuffer table provides statistics about disk page buffer usage by NDB Cluster Disk Data tables. The diskpagebuffer table contains the following columns: node_id The data node ID block_instance Block instance pages_written Number of pages ...If any of these values are less than 95%, this is a strong indicator that the setting for DiskPageBufferMemory needs to be increased in the config.ini ...