public StatementPrefetch::setFetchMode($mode, $a1 = NULL, $a2 = array())
Sets the default fetch mode for this statement.
See http://php.net/manual/pdo.constants.php for the definition of the constants used.
Parameters
$mode: One of the PDO::FETCH_* constants.
$a1: An option depending of the fetch mode specified by $mode:
for PDO::FETCH_COLUMN, the index of the column to fetch for PDO::FETCH_CLASS, the name of the class to create for PDO::FETCH_INTO, the object to add the data to
$a2: If $mod