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https://dev.mysql.com/doc/refman/8.4/en/data-dictionary-file-removal.html
ddl_log.log file: The file contained records of metadata operations generated by data definition statements such as DROP TABLE and ALTER TABLE. Unless otherwise noted, data previously stored in metadata files is now stored in data dictionary tables.
https://dev.mysql.com/doc/refman/8.4/en/innodb-read-only-instance.html
The same restriction applies to any operation that modifies data dictionary tables, such as ANALYZE TABLE and ALTER TABLE tbl_name ENGINE=engine_name. You can query InnoDB tables where the MySQL data directory is on read-only media by enabling the ...How to Enable To prepare an instance for read-only operation, make sure all the necessary information is flushed to the data files before storing it on the read-only ...
https://dev.mysql.com/doc/refman/8.4/en/myisam-table-formats.html
When you use CREATE TABLE or ALTER TABLE for a table that has no BLOB or TEXT columns, you can force the table format to FIXED or DYNAMIC with the ROW_FORMAT table option. The third, compressed format, can be created only with the myisampack utility ...Two of them, fixed and dynamic format, are chosen automatically depending on the type of columns you are ...
https://dev.mysql.com/doc/refman/8.4/en/faqs-tablespace-encryption.html
To encrypt data in an InnoDB file-per-table tablespace, run ALTER TABLE tbl_name ENCRYPTION = 'Y'. To encrypt a general tablespace or the mysql tablespace, run ALTER TABLESPACE tablespace_name ENCRYPTION = 'Y'. Does the transportable tablespaces ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-importing-data.html
You may also wish to do this when performing bulk DELETE or UPDATE operations on NDB Cluster tables. If a data import operation does not complete successfully, for whatever reason, you should be prepared to perform any necessary cleanup including ...
https://dev.mysql.com/doc/internals/en/transactions-notes-on-ddl-and-normal-transaction.html
In addition, some DDL statements issue interim transaction commits: for example, ALTER TABLE issues a commit after data is copied from the original table to the internal temporary table. DDL statements use a form of "semantic" logging to maintain ...
https://dev.mysql.com/doc/refman/8.4/en/binary-log-setting.html
Examples include all DDL (data definition language) statements such as CREATE TABLE, ALTER TABLE, or DROP TABLE. If a session has open temporary tables, the replication format cannot be changed for the session (SET @@SESSION.binlog_format). If any ... You can select the binary logging format explicitly by starting the MySQL server with ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-benchmarking.html
If you did not make a deliberate decision about the storage engine, and you want to preview how certain tables work when created using InnoDB, issue the command ALTER TABLE table_name ENGINE=InnoDB; for each table. Alternatively, to run test queries ...Since changing the default storage engine only affects newly created tables, run your application installation and setup steps to confirm that everything installs properly, then exercise the application features to make sure the data loading, editing, and querying features ... If InnoDB is not the default storage ...
https://dev.mysql.com/doc/refman/8.4/en/replication-features-partitioning.html
Replication is supported between partitioned tables as long as they use the same partitioning scheme and otherwise have the same structure, except where an exception is specifically allowed (see Section 19.5.1.9, “Replication with Differing Table ...DROP PARTITION) that act directly on partitions in such cases might produce different results on the source and the ...
https://dev.mysql.com/doc/connectors/en/connector-j-usagenotes-spring-config-transactional.html
ALTER TABLE City ENGINE=InnoDB; ALTER TABLE Country ENGINE=InnoDB; ALTER TABLE CountryLanguage ENGINE=InnoDB; A good programming practice emphasized by Spring is separating interfaces and implementations. To use transactional database access, we ...