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https://dev.mysql.com/doc/refman/8.4/en/innodb-information-schema-buffer-pool-tables.html
Example 17.6 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/doc/refman/8.4/en/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/doc/refman/8.4/en/obtaining-plugin-information.html
Any that have a PLUGIN_LIBRARY value of NULL are built in and cannot be unloaded. row *************************** PLUGIN_NAME: binlog PLUGIN_VERSION: 1.0 PLUGIN_STATUS: ACTIVE PLUGIN_TYPE: STORAGE ENGINE PLUGIN_TYPE_VERSION: 80100.0 PLUGIN_LIBRARY: ... There are several ways to determine which plugins are installed in the server: The Information Schema PLUGINS table contains a row for each loaded ...
https://dev.mysql.com/doc/refman/8.4/en/sys-sys-config.html
The value is NULL if the row has not been changed since the sys schema was installed. (For example, the variable corresponding to the diagnostics.include_raw option is @sys.diagnostics.include_raw.) If the user-defined variable exists in the current ... This table contains sys schema configuration options, one row per ...
https://dev.mysql.com/doc/c-api/8.4/en/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) Description Note mysql_fetch_row_nonblocking() is an asynchronous ...
https://dev.mysql.com/doc/mysql-ai/9.4/en/mys-mysqlai-ml-model-active.html
If user is set to current or NULL, the following information displays. Use the ML_MODEL_ACTIVE routine to check which models are loaded and active for which users. All active users and models share the amount of memory defined by the shape, and it ...
https://dev.mysql.com/doc/connectors/en/connector-j-usagenotes-connect-drivermanager.html
import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; Connection conn = null; ... When you are using JDBC outside of an application server, the DriverManager class manages the establishment of connections. Specify ...
https://dev.mysql.com/doc/relnotes/connector-net/en/news-8-0-8.html
(WL #10559) Document Store: It is no longer permitted to pass an empty search condition, such as the NULL value or an empty string, to the Collection.Modify and Collection.Remove methods. MySQL Connectors and other MySQL client tools and ...
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-metric-replicationreplica-activity-category.html
NULL if the replica SQL thread is not running, or if the replica I/O thread is not running or not connected to the source. Lists the Replication Replica Activity metrics and provides a brief description of each. Table 6.27 Replication Replica ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-auto-unload-syntax.html
This adds an include list to exactly specify the tables to unload, which eliminates the need to include a database and exclude unnecessary tables. mysql> CALL sys.HEATWAVE_UNLOAD_all ([options]); options: { JSON_OBJECT("key","value"[,"key","value"] ...