Hi, Alexey! On Jan 20, Alexey Botchkov wrote:

+typedef struct st_mysql MYSQL; +typedef struct st_mysql_res MYSQL_RES; +typedef char **MYSQL_ROW; + +extern struct sql_service_st { + MYSQL *(*sqls_init)(MYSQL *mysql); + void (*sqls_close)(MYSQL *mysql); + int (*sqls_real_query)(MYSQL *mysql, const char *q, + unsigned long length); + unsigned long (*sqls_affected_rows)(MYSQL *mysql); + uint (*sqls_errno)(MYSQL *mysql); + const char *(*sqls_error)(MYSQL *mysql); + MYSQL_RES *(*sqls_store_result)(MYSQL *mysql); + void (*sqls_free_result)(MYSQL_RES *result); + unsigned long (*sqls_num_rows)(MYSQL_RES *res); + unsigned int (*sqls_num_fields)(MYSQL_RES *res); + MYSQL_ROW (*sqls_fetch_row)(MYSQL_RES *result); + unsigned long * (*sqls_fetch_lengths)(MYSQL_RES *result); +} *sql_service;

I'd say, if you're emulating client C API, you don't need all these sqls* functions. You basically only need one function, let's call it mysql_internal_connect() which is a variant of mysql_real_connect() for running SQL internally in the server. And it'll do mysql->methods= &internal_sql_methods; which will be your callback table, you won't need a second one. And after that mysql_* API functions will work normally. At least those that you decide to support. Alternatively you don't even need mysql_internal_connect(), you can integrate it into CLI_MYSQL_REAL_CONNECT (just like you've done with libmysqld.c:mysql_real_connect() calling cli_mysql_real_connect()). Regards, Sergei Chief Architect MariaDB and security@mariadb.org