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https://dev.mysql.com/doc/refman/8.4/en/performance-schema-setup-actors-table.html
The setup_actors table contains information that determines whether to enable monitoring and historical event logging for new foreground server threads (threads associated with client connections). This table has a maximum size of 100 rows by ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-setup-instruments-table.html
The setup_instruments table lists classes of instrumented objects for which events can be collected: mysql> SELECT * FROM performance_schema.setup_instruments\G *************************** 1. row *************************** NAME: ...row ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-statement-tables.html
These tables store statement events: events_statements_current: The current statement event for each thread. prepared_statements_instances: Prepared statement instances and statistics The following sections describe the statement event tables. There ...Statement events occur at a high level of the event ...
https://dev.mysql.com/doc/refman/8.4/en/optimizer-hints.html
For example, you can enable an optimization for one table in a statement and disable the optimization for a different table. References to table and index names follow the usual identifier case-sensitivity rules (see Section 11.2.3, “Identifier ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-ndb-sync-excluded-objects-table.html
This table provides information about NDB database objects which cannot be automatically synchronized between NDB Cluster's dictionary and the MySQL data dictionary. row *************************** SCHEMA_NAME: NULL NAME: ts1 TYPE: TABLESPACE ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-socket-summary-tables.html
These socket summary tables aggregate timer and byte count information for socket operations: socket_summary_by_event_name: Aggregate timer and byte count statistics generated by the wait/io/socket/* instruments for all socket I/O operations, per ...socket_summary_by_instance: Aggregate timer and byte count statistics generated by the wait/io/socket/* instruments for all socket I/O operations, per socket ...
https://dev.mysql.com/doc/x-devapi-userguide/en/collections-as-relational-tables.html
Applications that seek to store standard SQL columns with Documents can cast a collection to a table. In this case a collection can be fetched as a Table object with the Schema.getCollectionAsTable() function. From that moment on it is treated as a ...Document values can be accessed in SQL CRUD operations using the following syntax: doc->'$.field' doc->'$.field' is used to access the document top level ...
https://dev.mysql.com/doc/refman/8.4/en/charset-table.html
Every table has a table character set and a table collation. The CREATE TABLE and ALTER TABLE statements have optional clauses for specifying the table character set and collation: CREATE TABLE tbl_name (column_list) [[DEFAULT] CHARACTER SET ...If ...
https://dev.mysql.com/doc/refman/8.4/en/information-schema-innodb-tablespaces-table.html
The INNODB_TABLESPACES table provides metadata about InnoDB file-per-table, general, and undo tablespaces. For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. Note The ...
https://dev.mysql.com/doc/refman/8.4/en/nontransactional-tables.html
If you receive the following message when trying to perform a ROLLBACK, it means that one or more of the tables you used in the transaction do not support transactions: Warning: Some non-transactional changed tables couldn't be rolled back These ...