Search Results
https://dev.mysql.com/doc/internals/en/closing-a-table.html
When the MySQL server is finished with a table, it will call the [custom-engine.html#custom-engine-api-reference-close close()] method to close file pointers and release any other resources.
https://dev.mysql.com/doc/heatwave/en/mys-hw-rpd-exec-stats-table.html
The rpd_exec_stats table stores query execution statistics produced by MySQL HeatWave nodes in JSON format. One row of execution statistics is stored for each node that participates in the query. For MySQL HeatWave AutoML routines that include ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-rpd-query-stats-table.html
The rpd_query_stats table stores query compilation and execution statistics produced by the MySQL HeatWave plugin in JSON format. The rpd_query_stats table has these columns: CONNECTION_ID The ID of the connection. For MySQL HeatWave AutoML ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-column-statistics-table.html
The COLUMN_STATISTICS table provides access to histogram statistics for column values. For information about histogram statistics, see Section 10.9.6, “Optimizer Statistics”, and Section 15.7.3.1, “ANALYZE TABLE Statement”. The ...You can ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-keywords-table.html
The KEYWORDS table lists the words considered keywords by MySQL and, for each one, indicates whether it is reserved. This table provides applications a runtime source of MySQL keyword information. Reserved keywords may require special treatment in ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-parameters-table.html
The PARAMETERS table provides information about parameters for stored routines (stored procedures and stored functions), and about return values for stored functions. The PARAMETERS table does not include built-in (native) functions or loadable ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-role-column-grants-table.html
The ROLE_COLUMN_GRANTS table provides information about the column privileges for roles that are available to or granted by the currently enabled roles. The ROLE_COLUMN_GRANTS table has these columns: GRANTOR The user name part of the account that ...GRANTOR_HOST The host name part of the account that granted the ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-tablespaces-extensions-table.html
The TABLESPACES_EXTENSIONS table provides information about tablespace attributes defined for primary storage engines. The TABLESPACES_EXTENSIONS table has these columns: TABLESPACE_NAME The name of the tablespace.
https://dev.mysql.com/doc/refman/8.4/en/information-schema-view-routine-usage-table.html
The VIEW_ROUTINE_USAGE table provides access to information about stored functions used in view definitions. The table does not list information about built-in (native) functions or loadable functions used in the definitions. The VIEW_ROUTINE_USAGE ...You can see information only for views for which you have some privilege, and only for functions for which you have some ...
https://dev.mysql.com/doc/refman/8.4/en/optimize-multi-tables.html
Some techniques for keeping individual queries fast involve splitting data across many tables. When the number of tables runs into the thousands or even millions, the overhead of dealing with all these tables becomes a new performance consideration.