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https://dev.mysql.com/doc/refman/8.0/en/explain-output.html
Table information must be read from the data dictionary and by reading table files. Using filesort (JSON property: using_filesort) MySQL must do an extra pass to find out how to retrieve the rows in sorted order. That is, the named index covers the ... The EXPLAIN statement provides information about how MySQL executes ...Note MySQL Workbench has a Visual ...
https://dev.mysql.com/doc/refman/8.0/en/backup-strategy-example.html
The InnoDB data files might not contain consistent data due to the crash, but InnoDB reads its logs and finds in them the list of pending committed and noncommitted transactions that have not been flushed to the data files. InnoDB: Apply batch ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-installer-change-path-proc.html
Note Starting with MySQL Installer 1.4.39, if you move the data directory of an installed server manually, MySQL Installer identifies the change and can process a reconfiguration operation without errors. You can change the default installation ...
https://dev.mysql.com/doc/refman/8.0/en/resetting-permissions.html
For example: C:\> mysqld --defaults-file="C:\\ProgramData\\MySQL\\MySQL Server 8.0\\my.ini" --init-file=C:\\mysql-init.txt The appropriate --defaults-file setting can be found using the Services Manager: From the Start menu, select Control Panel, ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-select-all.html
Usage ndb_select_all -c connection_string tbl_name -d db_name [> file_name] Options that can be used with ndb_select_all are shown in the following table. --core-file Command-Line Format --core-file Removed 8.0.31 Write core file on error; used in ...This option can be used only in conjunction with the -o (--order) ...
https://dev.mysql.com/doc/refman/8.0/en/alter-logfile-group.html
For example, you cannot have a tablespace and an undo log file with the same name, or an undo log file and a data file with the same name. This includes any default value implied for this option by the setting of the InitialLogFileGroup data node ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-replication-issues.html
Examples of incidents are server failures, database resynchronization, some software updates, and some hardware changes.) When the replica encounters a gap in the replication log, it stops with an error message. For replication from NDB to a ...A ...
https://dev.mysql.com/doc/refman/8.0/en/macos-installation-launchd.html
The md5 checksum of a file containing the above snippet is d925f05f6d1b6ee5ce5451b596d6baed. Figure 2.18 MySQL Preference Pane: Location The Instances page includes an option to start or stop MySQL, and Initialize Database recreates the data/ ...To ... macOS uses launch daemons to automatically start, stop, and manage processes and applications such as ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-foreign-keys.html
The CONSTRAINT symbol value, if defined, must be unique in the database. Corresponding columns in the foreign key and the referenced key must have similar data types. row *************************** ID: test/child_ibfk_1 FOR_COL_NAME: parent_id ...A ...(Bug #30512043) Table and column identifiers in a FOREIGN KEY ...
https://dev.mysql.com/doc/refman/8.0/en/replication-binlog-encryption-key-rotation.html
If any of the first four steps of the binary log master key rotation process cannot be completed correctly, an error message is issued explaining the situation and the consequences for the encryption status of the binary log files and relay log ...