Libzdb

Connection URL:

The URL given to a Connection Pool at creation time specify a database connection on the standard URL format. The format of the connection URL is defined as:

database://[user:password@][host][:port]/database[?propertyName1][=propertyValue1][&propertyName2][=propertyValue2]...

The property names user and password are always recognized and specify how to login to the database. Other properties depends on the database server in question. (See Connection URL for details). User name and password can alternatively be specified in the auth-part of the URL. If port number is omitted, the default port number for the database server is used.

ConnectionPool, Connection and ResultSet:

URL_T url = URL_new("mysql://localhost/test?user=root&password=swordfish");
ConnectionPool_T pool = ConnectionPool_new(url);
ConnectionPool_start(pool);

Connection_T con = ConnectionPool_getConnection(pool);
ResultSet_T result = Connection_executeQuery(con, 
                     "select id, name, image from employee where salary > %d", aNumber);
while (ResultSet_next(result)) 
{
     int id = ResultSet_getInt(result, 1);
     const char *name = ResultSet_getString(result, 2);
     int blobSize;
     const void *image = ResultSet_getBlob(result, 3, &blobSize);
     [..]
}
                

Here is another example where a generated result is selected and printed:

ResultSet_T r = Connection_executeQuery(con, "SELECT count(*) FROM users");
printf("Number of users: %s\n", ResultSet_next(r) ? ResultSet_getString(r, 1) : "no users");
                

PreparedStatement_T p = Connection_prepareStatement(con, 
                        "INSERT INTO employee(name, picture) VALUES(?, ?)");
PreparedStatement_setString(p, 1, "Kamiya Kaoru");
PreparedStatement_setBlob(p, 2, jpeg, jpeg_size);
PreparedStatement_execute(p);
               

PreparedStatement_T p = Connection_prepareStatement(con, 
                        "SELECT id FROM employee WHERE name LIKE ?"); 
PreparedStatement_setString(p, 1, "%Kaoru%");
ResultSet_T r = PreparedStatement_executeQuery(p);
while (ResultSet_next(r))
       printf("employee.id = %d\n", ResultSet_getInt(r, 1));