MySQL 9.5 C API Developer Guide / ... / C API Basic Interface / C API Basic Function Descriptions / mysql_list_dbs()
MYSQL_RES *mysql_list_dbs(MYSQL *mysql, const char *wild) Returns a result set consisting of database names on the server that match the simple regular expression specified by thewild parameter.wild may contain the wildcard characters% or_, or may be aNULL pointer to match all databases. Callingmysql_list_dbs() is similar to executing the querySHOW DATABASES [LIKE.wild]
You must free the result set withmysql_free_result().
Commands were executed in an improper order.
Out of memory.
The MySQL server has gone away.
The connection to the server was lost during the query.
An unknown error occurred.