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https://dev.mysql.com/doc/refman/8.0/en/binary-log-mysql-database.html
The contents of the grant tables in the mysql database can be modified directly (for example, with INSERT or DELETE) or indirectly (for example, with GRANT or CREATE USER). This pertains to statements such as GRANT, REVOKE, SET PASSWORD, RENAME ...
https://dev.mysql.com/doc/refman/8.0/en/data-dictionary-information-schema.html
In particular, for each INFORMATION_SCHEMA table that is a view on data dictionary tables: The server no longer must create a temporary table for each query of the INFORMATION_SCHEMA table. When the underlying data dictionary tables store values ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo.html
ndbinfo is included with NDB Cluster support in the MySQL Server; no special compilation or configuration steps are required; the tables are created by the MySQL Server when it connects to the cluster. This database contains a number of tables, each ... ndbinfo is a database containing information specific to NDB ...
https://dev.mysql.com/doc/refman/8.0/en/compressed-format.html
Compressed tables have the following characteristics: Compressed tables take very little disk space. The header for a row takes up one to three bytes depending on the biggest row in the table. Note While a compressed table is read only, and you ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-delete-all.html
In some cases, this can be much faster than DELETE or even TRUNCATE TABLE. Usage ndb_delete_all -c connection_string tbl_name -d db_name This deletes all rows from the table named tbl_name in the database named db_name. Options that can be used with ...--connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of times to retry connection before giving ...
https://dev.mysql.com/doc/refman/8.0/en/hash-joins.html
row *************************** id: 1 select_type: SIMPLE table: t1 partitions: NULL type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 1 filtered: 100.00 Extra: NULL *************************** 2. Prior to MySQL 8.0.20, a hash ...
https://dev.mysql.com/doc/refman/8.0/en/rewriter-query-rewrite-plugin-reference.html
Users communicate with the plugin by modifying the set of rules stored in this table. The plugin communicates information to users by setting the table's message column. Note The rules table is loaded into the plugin by the flush_rewrite_rules ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ps-tables.html
Thread names are shown in the name column of the threads and setup_threads tables using the format prefix/plugin_name/thread_name. Using the thread ID or OS thread ID for a given thread in the threads or setup_threads table, it is possible to obtain ... NDB 8.0 provides information in the MySQL Performance Schema about threads and transaction memory usage; NDB 8.0.29 adds ndbcluster plugin threads, and NDB 8.0.30 adds instrumenting for transaction batch ...
https://dev.mysql.com/doc/refman/8.0/en/replication-rules-examples.html
If you use a combination of database-level and table-level replication filtering options, the replica first accepts or ignores events using the database options, then it evaluates all events permitted by those options according to the table options. With row-based format, DML statements are handled based on the database where the modified table ...It is also important to note that the results vary ...
https://dev.mysql.com/doc/refman/8.0/en/storage-engines.html
(The CREATE TABLE statement in MySQL 8.0 creates InnoDB tables by default.) MySQL Server uses a pluggable storage engine architecture that enables storage engines to be loaded into and unloaded from a running MySQL server. You can create tables with ... Storage engines are MySQL components that handle the SQL operations for different table ...