/**
 * @return PDOStatement|false
 */
public function run($sql, $args = [])
{
    if (!$args) {
        return $this->pdo->query($sql);
    }
    if ($stmt = $this->pdo->prepare($sql)) {
        if ($stmt->execute($args)) {
            return $stmt;
        }
    }

    return false; //either prepare or execute failed
}