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https://dev.mysql.com/doc/refman/8.0/en/information-schema-optimizer-trace-table.html
INSUFFICIENT_PRIVILEGES If a traced query uses views or stored routines that have SQL SECURITY with a value of DEFINER, it may be that a user other than the definer is denied from seeing the trace of the query. The OPTIMIZER_TRACE table provides ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-table-constraints-table.html
The TABLE_CONSTRAINTS table has these columns: CONSTRAINT_CATALOG The name of the catalog to which the constraint belongs. CONSTRAINT_SCHEMA The name of the schema (database) to which the constraint belongs. TABLE_SCHEMA The name of the schema ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-tables-table.html
If there are no cached statistics or statistics have expired, statistics are retrieved from storage engines when querying table statistics columns. The information_schema_stats_expiry system variable defines the period of time before cached table ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-triggers-table.html
To see information about a table's triggers, you must have the TRIGGER privilege for the table. The TRIGGERS table has these columns: TRIGGER_CATALOG The name of the catalog to which the trigger belongs. TRIGGER_SCHEMA The name of the schema ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-views-table.html
You must have the SHOW VIEW privilege to access this table. The VIEWS table has these columns: TABLE_CATALOG The name of the catalog to which the view belongs. TABLE_SCHEMA The name of the schema (database) to which the view belongs. VIEW_DEFINITION ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-and-mysql-replication.html
It is possible to use replication in a way where the storage engine on the replica is not the same as the storage engine on the source. For example, you can replicate modifications to an InnoDB table on the source to a MyISAM table on the replica.
https://dev.mysql.com/doc/refman/8.0/en/innodb-autocommit-commit-rollback.html
This mode of operation might be unfamiliar if you have experience with other database systems, where it is standard practice to issue a sequence of DML statements and commit them or roll them back all together. If autocommit mode is enabled, each ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-benefits.html
InnoDB tables have the following benefits: If the server unexpectedly exits because of a hardware or software issue, regardless of what was happening in the database at the time, you don't need to do anything special after restarting the database.
https://dev.mysql.com/doc/refman/8.0/en/innodb-buffer-pool-in-core-file.html
Excluding buffer pool pages may also be desirable from a security perspective if you have concerns about dumping database pages to core files that may be shared inside or outside of your organization for debugging purposes. A core file records the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-change-buffer.html
If the working set almost fits in the buffer pool, or if your tables have relatively few secondary indexes, it may be useful to disable change buffering. The change buffer is a special data structure that caches changes to secondary index pages ...