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https://dev.mysql.com/doc/internals/en/event-data-for-specific-event-types.html
LOAD DATA INFILE statements have been associated over time with several different events. SELECT fails after inserting 1000 rows into a MyISAM table (for example, with a duplicate-key violation), we have to write this statement to the binary log, ...
https://dev.mysql.com/doc/internals/en/full-text-search.html
If we multiply the base part times the normalization factor, we have the term weight. In the classic Vector Space formula, the final part would be the inverse document frequency, or simply log(N/nf) We have replaced it with log((N-nf)/nf) This ...
https://dev.mysql.com/doc/internals/en/implementing-rnd-next-method.html
A table with as many as eight nullable columns will have a one-byte bitmap; a table with nine to sixteen nullable columns will have a two-byte bitmap, and so forth. One exception is fixed-width tables, which have an additional starting bit so that a ... After the table is initialized, the MySQL server will call the handler's [custom-engine.html#custom-engine-api-reference-rnd_next rnd_next()] method once for every row to be scanned until the server's search condition is satisfied or an end of file is reached, in which case the handler returns ...
https://dev.mysql.com/doc/internals/en/replication-correct.html
(rpl-missing-slave-columns) binlog_format=ROW and the master has extra columns after the columns of the slave, as long as the following rules apply: The slave cannot have both missing columns and extra columns (see above) at the same time. This can ... In addition to what we guarantee in (P-rpl-correct), we also guarantee correct replication in the following scenarios: (P-rpl-different-file-system-case-sensitivities) TODO: allowed differences in file system case sensitivity (P-rpl-different-versions) Replication shall be correct even if master has version a.b.c and slave has version A.B.C, where A.B.C ≥ a.b.c and A ≤ ...
https://dev.mysql.com/doc/internals/en/synchronization-pattern.html
If you want to have a Debug Sync point with the wait, please place it behind enter_cond(). Also you will have THD::proc_info correct when the sync point emits a signal. The sync point is before the loop (not inside the loop) to have it hit once only. This is done to allow the thread to be interrupted (killed) from its ...
https://dev.mysql.com/doc/internals/en/x-protocol-messages-messages.html
Message Structure Messages have a: 4 byte length (little endian) 1 byte message type a message_payload of length .length - 1 Mysqlx.Message Container of all messages that are exchanged between client and server. package Mysqlx.Expect:: Expect ...
https://dev.mysql.com/doc/mysql-installer/en/mysql-installer-catalog-dashboard.html
An installed product can have more than one upgrade version and the operation requires a current product catalog. Automatic Select this mode to have MySQL Installer look for system settings and to use those settings if found, or to use no proxy if ... This section describes the MySQL Installer product catalog, the dashboard, and other actions related to product selection and ...
https://dev.mysql.com/doc/ndbapi/en/mccj-clusterj-sessionfactory.html
This requires the property com.mysql.clusterj.multidb to have been set to true when the SessionFactory was created. The timeout may have been specified in the original session factory properties or may have been changed by an application call to ...
https://dev.mysql.com/doc/ndbapi/en/mccj-using-clusterj-start.html
In either case, the code should wait until all sessions have been closed (that is, the public method getConnectionPoolSessionCounts() in the SessionFactory interface returns zeros for all pooled connections). In this section, we discuss how to ...
https://dev.mysql.com/doc/ndbapi/en/mgm-functions-backup.html
This section provides information about the functions provided in the MGM API for starting and stopping NDB Cluster backups. ndb_mgm_start_backup() ndb_mgm_start_backup2() ndb_mgm_start_backup3() ndb_mgm_start_backup4() ndb_mgm_abort_backup() ...