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https://dev.mysql.com/doc/c-api/8.4/en/c-api-prepared-call-statements.html
The expected return information from the procedure therefore consists of multiple result sets and a final status: One result set from a SELECT that displays the initial parameter values: 10, NULL, 30. (The OUT parameter is assigned a value by the ...
https://dev.mysql.com/doc/c-api/8.4/en/getting-unique-id.html
It is not even changed if you update another AUTO_INCREMENT column with a nonmagic value (that is, a value that is not NULL and not 0). If you store an explicit value other than NULL or 0, it does not affect the value returned by LAST_INSERT_ID().
https://dev.mysql.com/doc/c-api/8.4/en/mysql-fetch-lengths.html
In addition, if the result set contains binary data, you must use this function to determine the size of the data, because strlen() returns incorrect results for any field containing null characters. The length for empty columns and for columns ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-hex-string.html
The result is placed in the to argument, followed by a terminating null byte. When mysql_hex_string() returns, the contents of to is a null-terminated string. The return value is the length of the encoded string, not including the terminating null ... unsigned long mysql_hex_string(char *to, const char *from, unsigned long length) Description This function creates a legal SQL string for use in an SQL ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-stmt-fetch.html
If a fetched data value is a NULL value, the *is_null value of the corresponding MYSQL_BIND structure contains TRUE (1). int mysql_stmt_fetch(MYSQL_STMT *stmt) Description mysql_stmt_fetch() returns the next row in the result set. It can be called ...
https://dev.mysql.com/doc/c-api/8.4/en/mysql-store-result.html
mysql_store_result() returns NULL if the statement did not return a result set (for example, if it was an INSERT statement), or an error occurred and reading of the result set failed. (An empty result set differs from a null pointer as a return ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/writing-authentication-plugins-client-side.html
Declare the client-side plugin descriptor with the mysql_declare_client_plugin() and mysql_end_client_plugin macros (see Section 4.4.2.3, “Client Plugin Descriptors”). (For descriptions, see Section 4.4.2.3, “Client Plugin Descriptors”.) ...
https://dev.mysql.com/doc/extending-mysql/8.4/en/writing-information-schema-plugins.html
If no cleanup is needed, this descriptor member can be NULL (as in the example shown). static ST_FIELD_INFO simple_table_fields[]= { {"NAME", 10, MYSQL_TYPE_STRING, 0, 0 0, 0}, {"VALUE", 6, MYSQL_TYPE_LONG, 0, MY_I_S_UNSIGNED, 0, 0}, {0, 0, ... This ...
https://dev.mysql.com/doc/mysql-router/9.4/en/mysql-router-conf-options.html
destination Type String Default Value (Windows) CON Default Value (Other) /dev/stderr Valid Values (Windows) CON NUL Valid Values (Other) /dev/null /dev/stderr /dev/stdout Direct console log output to this device destination; set under the ... When ...
https://dev.mysql.com/doc/mysql-ai/9.5/en/mys-ai-aml-classification-generate-prediction.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); Make predictions for the test ...