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https://dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html
This section describes the options, system variables, and status variables that validate_password provides to enable its operation to be configured and monitored. The value should be one of those available for plugin-loading options, as described ...
https://dev.mysql.com/doc/refman/5.7/en/x-plugin-status-variables.html
If the bind has failed, or if the skip_networking option has been used, the value shows UNDEFINED. Mysqlx_errors_unknown_message_type The number of unknown message types that have been received. Mysqlx_notice_other_sent The number of other types of ...
https://dev.mysql.com/doc/refman/5.7/en/column-count-limit.html
mysql> CREATE TABLE t2 (c1 VARCHAR(65533) NOT NULL) ENGINE = InnoDB CHARACTER SET latin1; Query OK, 0 rows affected (0.01 sec) For MyISAM tables, NULL columns require additional space in the row to record whether their values are NULL. Each NULL ...
https://dev.mysql.com/doc/refman/5.7/en/create-table-secondary-indexes.html
row *************************** id: 1 select_type: SIMPLE table: jemp partitions: NULL type: range possible_keys: i key: i key_len: 5 ref: NULL rows: 2 filtered: 100.00 Extra: Using where 1 row in set, 1 warning (0.00 sec) mysql> SHOW WARNINGS\G ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-porting-mysql.html
Consider these aspects of memcached applications when adapting an existing MySQL schema or application to use the daemon_memcached plugin: memcached keys cannot contain spaces or newlines, because these characters are used as separators in the ...
https://dev.mysql.com/doc/refman/5.7/en/keyring-functions-general-purpose.html
If the key cannot be created, the return value is NULL and an error occurs. mysql> SELECT @x; +------+ | @x | +------+ | NULL | +------+ mysql> SELECT keyring_key_generate('x', 'AES', 16) INTO @x; mysql> SELECT @x; +------+ | @x | +------+ | 1 | ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-what-is-new-7-6.html
When the primary key is extended with an additional column or columns, any columns added must be defined as NOT NULL, and no values in any such columns may be changed during the time that the backup is being taken. Beginning with NDB 7.6.19, ... New ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-quick-start.html
row *************************** Table: setup_consumers Create Table: CREATE TABLE `setup_consumers` ( `NAME` varchar(64) NOT NULL, `ENABLED` enum('YES','NO') NOT NULL ) ENGINE=PERFORMANCE_SCHEMA DEFAULT CHARSET=utf8 Table structure is also available ... This section briefly introduces the Performance Schema with examples that show how to use ...
https://dev.mysql.com/doc/refman/5.7/en/show-index.html
row *************************** Table: city Non_unique: 0 Key_name: PRIMARY Seq_in_index: 1 Column_name: ID Collation: A Cardinality: 4188 Sub_part: NULL Packed: NULL Null: Index_type: BTREE Comment: Index_comment: *************************** 2. row ... SHOW {INDEX | INDEXES | KEYS} {FROM | IN} tbl_name [{FROM | IN} db_name] [WHERE expr] SHOW INDEX returns table index ...
https://dev.mysql.com/doc/refman/5.7/en/show-processlist.html
row *************************** Id: 1 User: system user Host: db: NULL Command: Connect Time: 1030455 State: Waiting for master to send event Info: NULL *************************** 2. row *************************** Id: 2 User: system user Host: db: ... SHOW [FULL] PROCESSLIST The MySQL process list indicates the operations currently being performed by the set of threads executing within the ...