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https://dev.mysql.com/doc/connector-j/en/connector-j-usagenotes-j2ee-concepts-connection-pooling.html
Connection pooling is a technique of creating and managing a pool of connections that are ready for use by any thread that needs them. Connection pooling can greatly increase the performance of your Java application, while reducing overall resource ...
https://dev.mysql.com/doc/refman/8.4/en/assignment-operators.html
Table 14.6 Assignment Operators Name Description := Assign a value = Assign a value (as part of a SET statement, or as part of the SET clause in an UPDATE statement) := Assignment operator. Causes the user variable on the left hand side of the ...
https://dev.mysql.com/doc/refman/8.4/en/create-table-gipks.html
row *************************** Table: auto_0 Create Table: CREATE TABLE `auto_0` ( `c1` varchar(50) DEFAULT NULL, `c2` int DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci 1 row in set (0.00 sec) mysql> SHOW CREATE ...
https://dev.mysql.com/doc/refman/8.4/en/date-calculations.html
You determine which animals these are by checking whether the death value is NULL. MySQL provides several functions that you can use to perform calculations on dates, for example, to calculate ages or extract parts of dates. To determine how many ...
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 ...