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https://dev.mysql.com/doc/c-api/8.4/en/mysql-fetch-field.html
For metadata-optional connections, this function returns NULL when the resultset_metadata system variable is set to NONE. NULL if no columns are left or the result set has no metadata. MYSQL_FIELD * mysql_fetch_field(MYSQL_RES *result) Description ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-init.html
If mysql is a NULL pointer, the function allocates, initializes, and returns a new object. NULL if there was insufficient memory to allocate a new object. MYSQL * mysql_init(MYSQL *mysql) Description Allocates or initializes a MYSQL object suitable ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/writing-keyring-plugins.html
The general descriptor also refers to keyring_system_variables, a structure that exposes a system variable to the SHOW VARIABLES statement: static struct st_mysql_sys_var *keyring_system_variables[]= { MYSQL_SYSVAR(data), NULL }; The keyring_init ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/writing-password-validation-plugins.html
This section describes how to write a server-side password-validation plugin. The instructions are based on the source code in the plugin/password_validation directory of MySQL source distributions. The validate_password.cc source file in that ...
https://dev.mysql.com/doc/mysql-router/9.4/en/mysql-router-deploying-sandbox.html
Test a MySQL Router installation by setting up a Router sandbox with InnoDB Cluster. In this case, Router acts as an intermediate node redirecting client connections to a list of servers. If one server fails, clients are redirected to the next ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-anomaly-detection-model-types.html
When training the model, the target_column_name parameter must be set to NULL. The target_column_name parameter must specify a column whose only allowed values are 0 (normal), 1 (anomalous), and NULL (unlabeled). All rows are used to train the ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-classification-generate-explanation.html
For the option to set the user name, you can set it to NULL. mysql> CALL sys.ML_MODEL_LOAD(@model, NULL); The following example uses the model handle. mysql> CALL sys.ML_MODEL_LOAD('classification_use_case', NULL); Use the ML_EXPLAIN_TABLE routine ... After training a classification model, you can query the default model explanation or query new model ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-model-quality.html
mysql> CALL sys.ML_MODEL_LOAD(@census_model, NULL); For more information about training and loading models, see Train a Model and Load a Model. mysql> CALL sys.ML_SCORE(table_name, target_column_name, model_handle, metric, score, [options]); The ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-predictions-ml-predict-table.html
mysql> CALL sys.ML_MODEL_LOAD(@census_model, NULL); For more information about training and loading models, see Train a Model and Load a Model. mysql> CALL sys.ML_PREDICT_TABLE('census_data.census_train', @census_model, ... ML_PREDICT_TABLE ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-prepare-data-split.html
If a target column is not required, you can set this parameter to NULL. If this is set to NULL, then the default value of false is selected. You can automatically create training and testing datasets with the TRAIN_TEST_SPLIT routine. Overview The ...