#define STRING_SIZE 50
 
#define SELECT_SAMPLE "SELECT col1, col2, col3, col4 FROM test_table"
 
MYSQL_STMT    *stmt;
MYSQL_BIND    bind[4];
MYSQL_RES     *prepare_meta_result;
MYSQL_TIME    ts;
unsigned long length[4];
int           param_count, column_count, row_count;
short         small_data;
int           int_data;
char          str_data[STRING_SIZE];
my_bool       is_null[4];
 
/* Prépare une commande SELECT pour lire les données dans la table test_table */
stmt = mysql_prepare(mysql, SELECT_SAMPLE, strlen(SELECT_SAMPLE));
if (!stmt)
{
  fprintf(stderr, " mysql_prepare(), SELECT failed\n");
  fprintf(stderr, " %s\n", mysql_error(mysql));
  exit(0);
}
fprintf(stdout, " prepare, SELECT successful\n");
 
/* Lit le nombre de paramètrs de la commande */
param_count= mysql_param_count(stmt);
fprintf(stdout, " total parameters in SELECT: %d\n", param_count);
 
if (param_count != 0) /* validate parameter count */
{
  fprintf(stderr, " invalid parameter count returned by MySQL\n");
  exit(0);
}
 
/* Lit les méta-données */
prepare_meta_result = mysql_get_metadata(stmt);
if (!prepare_meta_result)
{
  fprintf(stderr, " mysql_get_metadata(), returned no meta information\n");
  fprintf(stderr, " %s\n", mysql_stmt_error(stmt));
  exit(0);
}
 
/* Lit le nombre de colonnes de la requête */
column_count= mysql_num_fields(prepare_meta_result);
fprintf(stdout, " total columns in SELECT statement: %d\n", column_count);
 
if (column_count != 4) /* validate column count */
{
  fprintf(stderr, " invalid column count returned by MySQL\n");
  exit(0);
}
 
/* Exécute la requête SELECT */
if (mysql_execute(stmt))
{
  fprintf(stderr, " mysql_execute(), failed\n");
  fprintf(stderr, " %s\n", mysql_stmt_error(stmt));
  exit(0);
}
 
/* Lie les buffers de résultats pour les 4 colonnes avant de les lire */
 
/* INTEGER COLUMN */
bind[0].buffer_type= MYSQL_TYPE_LONG;
bind[0].buffer= (char *)&int_data;
bind[0].is_null= &is_null[0];
bind[0].length= &length[0];
 
/* STRING COLUMN */
bind[1].buffer_type= MYSQL_TYPE_VAR_STRING;
bind[1].buffer= (char *)str_data;
bind[1].buffer_length= STRING_SIZE;
bind[1].is_null= &is_null[1];
bind[1].length= &length[1];
 
/* SMALLINT COLUMN */
bind[2].buffer_type= MYSQL_TYPE_SHORT;
bind[2].buffer= (char *)&small_data;       
bind[2].is_null= &is_null[2];
bind[2].length= &length[2];
 
/* TIMESTAMP COLUMN */
bind[3].buffer_type= MYSQL_TYPE_TIMESTAMP;
bind[3].buffer= (char *)&ts;       
bind[3].is_null= &is_null[3];
bind[3].length= &length[3];
 
/* Lit les résultats */
if (mysql_bind_result(stmt, bind))
{
  fprintf(stderr, " mysql_bind_result() failed\n");
  fprintf(stderr, " %s\n", mysql_stmt_error(stmt));
  exit(0);
}
 
/* Maintenant, lis les résultats dans les buffers */
if (mysql_stmt_store_result(stmt))
{
  fprintf(stderr, " mysql_stmt_store_result() failed\n");
  fprintf(stderr, " %s\n", mysql_stmt_error(stmt));
  exit(0);
}
 
/* Lit toutes les lignes */
row_count= 0;
fprintf(stdout, "Fetching results ...\n");
while (!mysql_stmt_fetch(stmt))
{
  row_count++;
  fprintf(stdout, "  row %d\n", row_count);
 
  /* colonne 1 */
  fprintf(stdout, "   column1 (integer)  : ");
  if (is_null[0])
    fprintf(stdout, " NULL\n");
  else
    fprintf(stdout, " %d(%ld)\n", int_data, length[0]);
 
  /* colonne 2 */
  fprintf(stdout, "   column2 (string)   : ");
  if (is_null[1])
    fprintf(stdout, " NULL\n");
  else
    fprintf(stdout, " %s(%ld)\n", str_data, length[1]);
 
  /* colonne 3 */
  fprintf(stdout, "   column3 (smallint) : ");
  if (is_null[2])
    fprintf(stdout, " NULL\n");
  else
    fprintf(stdout, " %d(%ld)\n", small_data, length[2]);
 
  /* colonne 4 */
  fprintf(stdout, "   column4 (timestamp): ");
  if (is_null[3])
    fprintf(stdout, " NULL\n");
  else
    fprintf(stdout, " %04d-%02d-%02d %02d:%02d:%02d (%ld)\n",
                                               ts.year, ts.month, ts.day,
                                               ts.hour, ts.minute, ts.second,
                                               length[3]);
  fprintf(stdout, "\n");
}
 
/* Valide la ligne lue */
fprintf(stdout, " total rows fetched: %d\n", row_count);
if (row_count != 2)
{
  fprintf(stderr, " MySQL failed to return all rows\n");
  exit(0);
} 
 
/* Libère les méta-données de résultat */
mysql_free_result(prepare_meta_result);
 /* Ferme la commande */
if (mysql_stmt_close(stmt))
{
  fprintf(stderr, " failed while closing the statement\n");
  fprintf(stderr, " %s\n", mysql_stmt_error(stmt));
  exit(0);
}