https://dev.mysql.com/grant-tables.html
The value is non-NULL only for accounts that use a MySQL built-in authentication plugin (mysql_native_password, sha256_password, or caching_sha2_password). The value is NULL for other accounts, such as those authenticated using an external ... The ...
https://dev.mysql.com/innodb-information-schema-buffer-pool-tables.html
Example 15.6 Querying System Data in the INNODB_BUFFER_PAGE Table This query provides an approximate count of pages that contain system data by excluding pages where the TABLE_NAME value is either NULL or includes a slash / or period . The InnoDB ...
https://dev.mysql.com/innodb-memcached-troubleshoot.html
When defining your own InnoDB table for use with the daemon_memcached plugin, and columns in the table are defined as NOT NULL, ensure that values are supplied for the NOT NULL columns when inserting a record for the table into the ... This section ...
https://dev.mysql.com/json-utility-functions.html
For a JSON column which has been updated such that its binary representation is the same as or larger than before, or if the update was not able to take advantage of a partial update, it returns 0; it returns NULL if the argument is NULL. If ...
https://dev.mysql.com/keyring-service.html
If there is no user context, this value can be NULL. Syntax: bool my_key_fetch(const char *key_id, const char **key_type, const char* user_id, void **key, size_t *key_len) Arguments: key_id, user_id: Null-terminated strings that as a pair form a ...
https://dev.mysql.com/myisamchk-table-info.html
uint24 NULL 0 1024 Field Start Length Nullpos Nullbit Type 1 1 1 2 2 4 no zeros 3 6 81 varchar 4 87 81 varchar 5 168 3 1 1 no zeros 6 171 3 1 2 no zeros Explanations for the types of information myisamchk produces are given here. Nullpos, Nullbit ...
https://dev.mysql.com/mysql-fetch-row-nonblocking.html
The two functions differ as follows: mysql_fetch_row() returns a MYSQL_ROW value containing the next row, or NULL. The meaning of a NULL return depends on which function was called preceding mysql_fetch_row(): When used after mysql_store_result() or ... enum net_async_status mysql_fetch_row_nonblocking(MYSQL_RES *result, MYSQL_ROW *row) Note mysql_fetch_row_nonblocking() is an asynchronous ...
https://dev.mysql.com/partitioning-list.html
Note In MySQL 8.0, it is possible to match against only a list of integers (and possibly NULL—see Section 23.2.7, “How MySQL Partitioning Handles NULL”) when partitioning by LIST. List partitioning in MySQL is similar to range partitioning in ...
https://dev.mysql.com/partitioning-management-exchange.html
Table nt contains no foreign key references, and no other table has any foreign keys that refer to nt. There are no rows in nt that lie outside the boundaries of the partition definition for p. To determine the row format of an InnoDB table, query ...
https://dev.mysql.com/partitions-table.html
SUBPARTITION_NAME If the PARTITIONS table row represents a subpartition, the name of subpartition; otherwise NULL. For partitions whose PARTITION_METHOD is other than RANGE or LIST, this column is always NULL. However, the values of the ...Each row ...
