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https://dev.mysql.com/doc/refman/8.4/en/sys-user-summary-by-statement-latency.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. The user_summary_by_statement_latency and x$user_summary_by_statement_latency ...
https://dev.mysql.com/doc/refman/8.4/en/sys-user-summary-by-statement-type.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. These views summarize information about statements executed, grouped by user ...
https://dev.mysql.com/doc/refman/8.4/en/sys-user-summary.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. These views summarize statement activity, file I/O, and connections, grouped ...
https://dev.mysql.com/doc/refman/8.4/en/x-plugin-checking-installation.html
| mysqlx | ACTIVE | DAEMON | NULL | GPL | ... X Plugin is enabled by default in MySQL 8, therefore installing or upgrading to MySQL 8 makes the plugin available. You can verify X Plugin is installed on an instance of MySQL server by using the SHOW ...
https://dev.mysql.com/doc/mysql-enterprise-backup/8.4/en/backup-commands-other.html
Use the --error-code option to supply the exit code for which you want to receive the associated exit message: $ mysqlbackup print-message --error-code=4 2> /dev/null One of the required files not found For a list of mysqlbackup exit codes and ...
https://dev.mysql.com/doc/c-api/8.4/en/c-api-binary-log-interface-usage.html
The following simple example program demonstrates the binary log C API functions. Program notes: mysql is assumed to be a valid connection handler. The initial SET statement sets the @source_binlog_checksum user-defined variable that the server ...
https://dev.mysql.com/doc/c-api/8.4/en/c-api-optional-metadata.html
For metadata-optional connections, the mysql_fetch_field(), mysql_fetch_field_direct(), and mysql_fetch_fields() functions return NULL when resultset_metadata is set to NONE. When a client executes a statement that produces a result set, MySQL ...
https://dev.mysql.com/doc/c-api/8.4/en/c-api-prepared-statement-date-handling.html
mysql_stmt_bind_named_param(stmt, bind, 3, NULL); /* supply the data to be sent in the ts structure */ ts.year= 2002; ts.month= 02; ts.day= 03; ts.hour= 10; ts.minute= 45; ts.second= 20; mysql_stmt_execute(stmt); .. The binary (prepared statement) ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-change-user.html
Pass a db parameter of NULL if you do not want to have a default database. bool mysql_change_user(MYSQL *mysql, const char *user, const char *password, const char *db) Description Changes the user and causes the database specified by db to become ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-client-find-plugin.html
struct st_mysql_client_plugin * mysql_client_find_plugin(MYSQL *mysql, const char *name, int type) Description Returns a pointer to a loaded plugin, loading the plugin first if necessary. An error occurs if the type is invalid or the plugin cannot ...