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https://dev.mysql.com/doc/refman/8.4/en/error-log-event-fields.html
Error events intended for the error log contain a set of fields, each of which consists of a key/value pair. An event field may be classified as core, optional, or user-defined: A core field is set up automatically for error events. However, its ...
https://dev.mysql.com/doc/refman/8.4/en/events-configuration.html
Events are executed by a special event scheduler thread; when we refer to the Event Scheduler, we actually refer to this thread. When running, the event scheduler thread and its current state can be seen by users having the PROCESS privilege in the ...
https://dev.mysql.com/doc/refman/8.4/en/faqs-triggers.html
Where can I find the documentation for MySQL 8.4 triggers? A.5.2. Is there a way to view all triggers in a given database? A.5.7. Can a table have multiple triggers with the same trigger event and action time? A.5.11. Is it possible for a trigger to ...
https://dev.mysql.com/doc/refman/8.4/en/federated-usagenotes.html
The following items indicate features that the FEDERATED storage engine does and does not support: The remote server must be a MySQL server. The remote table that a FEDERATED table points to must exist before you try to access the table through the ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-status-variables.html
This section describes the status variables providing information about Group Replication. The status variables and their meanings are listed here: Gr_all_consensus_proposals_count Sum of all proposals that were initiated and terminated on this ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-columns-table.html
The related ST_GEOMETRY_COLUMNS table provides information about table columns that store spatial data. The COLUMNS table has these columns: TABLE_CATALOG The name of the catalog to which the table containing the column belongs. TABLE_SCHEMA The ...
https://dev.mysql.com/doc/refman/8.4/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/8.4/en/innodb-enabling-monitors.html
When InnoDB monitors are enabled for periodic output, InnoDB writes the output to mysqld server standard error output (stderr) every 15 seconds, approximately. InnoDB sends the monitor output to stderr rather than to stdout or fixed-size memory ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-online-ddl-limitations.html
The following limitations apply to online DDL operations: The table is copied when creating an index on a TEMPORARY TABLE. The ALTER TABLE clause LOCK=NONE is not permitted if there are ON...CASCADE or ON...SET NULL constraints on the table. Before ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-standard-monitor.html
The Lock Monitor is the same as the Standard Monitor except that it includes additional lock information. Enabling either monitor for periodic output turns on the same output stream, but the stream includes extra information if the Lock Monitor is ...