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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-user-defined-functions-table.html
The user_defined_functions table contains a row for each loadable function registered automatically by a component or plugin, or manually by a CREATE FUNCTION statement. The value is NULL if the function was registered by a CREATE FUNCTION ...For ...
https://dev.mysql.com/doc/refman/8.0/en/repair-table.html
EXTENDED If you use the EXTENDED option, MySQL creates the index row by row instead of creating one index at a time with sorting. This option tells MySQL not to trust the information in the .MYI file header and to re-create it using information from ...[QUICK] [EXTENDED] [USE_FRM] REPAIR TABLE repairs a possibly corrupted table, for certain storage engines ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-current-user.html
In some cases, such as statements that change passwords, the function reference is expanded before it is written to the binary log, so that the statement includes the user name. For all other cases, the name of the current user on the source is ...
https://dev.mysql.com/doc/refman/8.0/en/replication-howto.html
Optionally, create a separate user for your replicas to use during authentication with the source when reading the binary log for replication. Before creating a data snapshot or starting the replication process, on the source you should record the ... This section describes how to set up a MySQL server to use binary log file position based ...
https://dev.mysql.com/doc/refman/8.0/en/replication-privilege-checks-account.html
This privilege also allows the account to apply mysqlbinlog output that was created using the --disable-log-bin option. The Format_description_log_event, which deletes any temporary files created by LOAD DATA events, is processed without privilege ... The user account that is specified using the CHANGE REPLICATION SOURCE TO | CHANGE MASTER TO statement as the PRIVILEGE_CHECKS_USER account for a replication channel must have the REPLICATION_APPLIER privilege, otherwise the replication applier thread does not ...
https://dev.mysql.com/doc/refman/8.0/en/security-against-attack.html
This is extremely dangerous, because any user with the FILE privilege is able to cause the server to create files as root (for example, ~root/.bashrc). You can create a separate Unix account named mysql to make everything even more secure. In any ...
https://dev.mysql.com/doc/refman/8.0/en/set-operations.html
Result Set Column Names and Data Types Set Operations with TABLE and VALUES Statements Set Operations using DISTINCT and ALL Set Operations with ORDER BY and LIMIT Limitations of Set Operations SQL set operations combine the results of multiple ...
https://dev.mysql.com/doc/refman/8.0/en/show-procedure-status.html
It returns characteristics of a stored procedure, such as the database, name, type, creator, creation and modification dates, and character set information. To use either statement, you must be the user named as the routine DEFINER, have the ...
https://dev.mysql.com/doc/refman/8.0/en/storage-requirements.html
It connects to a current MySQL (not NDB Cluster) database and creates a report on how much space that database would require if it used the NDB storage engine. Leftover Digits Number of Bytes 0 0 1 1 2 1 3 2 4 2 5 3 6 3 7 4 8 4 Date and Time Type ...
https://dev.mysql.com/doc/refman/8.0/en/stored-routines-syntax.html
Stored routines are created with the CREATE PROCEDURE and CREATE FUNCTION statements (see Section 15.1.17, “CREATE PROCEDURE and CREATE FUNCTION Statements”). A stored routine is either a procedure or a function. A procedure is invoked using a ...