Programming Reference/Librarys
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A character string containing additional information about the most recent query. NULL if no information about the request are available.
compile with gcc mysql_info.c -o mysql_info `mysql_config –cflags –libs` -Wall
#include <stdio.h> /* including standard library */ #include <mysql/mysql.h> MYSQL *my; int main( void ){ char host[20]; char user[20]; char pass[20]; my = mysql_init(NULL); sprintf(host,"localhost"); sprintf(user,"username"); sprintf(pass,"password"); if (my == NULL ) { printf("Cant initalisize MySQL\n"); return 1; } if( mysql_real_connect (my,host,user,pass,NULL,0,NULL,0) == NULL) { printf("Error cant login\n"); } else { printf("Login correct\n"); } mysql_select_db(my,"test"); mysql_query(my, "INSERT INTO `test`.`collection`" " (`id`, `name`, `title`, `published`)" " VALUES (NULL, 'Demian', 'Debian 6.0', '2013-02-14');"); printf("MySQL Info: %s\n", mysql_info(my)); mysql_query(my, "UPDATE `test`.`collection`" " SET name = 'Debian'" " WHERE `name` LIKE 'Demian';"); printf("MySQL Info: %s\n", mysql_info(my)); mysql_close(my); return 0; }
-- -- Database: `test` -- CREATE DATABASE `test` DEFAULT CHARACTER SET latin1 COLLATE utf8_general_ci; USE `test`; -- -------------------------------------------------------- -- -- Tablestructure for Table `collection` -- CREATE TABLE IF NOT EXISTS `collection` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(90) NOT NULL, `title` varchar(255) NOT NULL, `published` date NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
Login correct
MySQL Info: (null)
MySQL Info: Rows matched: 1 Changed: 1 Warnings: 0