PDO Sqlite bug

<?php
function connect($dsn) {
    try { $pdo = new \PDO($dsn); }
    catch (\PDOException $e) { die('PDO: ' . $e->getMessage() . PHP_EOL); }
    return $pdo;
}

function doQuery($pdo, $sql) {
    if ( ($result = $pdo->query($sql)) === false) {
        echo "'$sql' failed: " . print_r($pdo->errorInfo(), true) . PHP_EOL;
    }
    return $result;
}

function create($pdo) {
    doQuery($pdo, 'DROP TABLE IF EXISTS public.foo');
    doQuery($pdo, 'CREATE TABLE public.foo ( ii int )');
    doQuery($pdo, 'INSERT INTO public.foo VALUES (42)');
}

$pgo = connect('pgsql:host=localhost;dbname=postgres');
$sqo = connect('sqlite::memory:');
doQuery($sqo, "ATTACH DATABASE ':memory:' AS public;") or die();

create($pgo);
create($sqo);

$pgResult = doQuery($pgo, 'SELECT COUNT(ii) FROM foo');
echo 'Postgres: ';
var_dump($pgResult->fetchColumn());

$ltResult = doQuery($sqo, 'SELECT COUNT(ii) FROM foo');
echo 'Sqlite3:  ';
var_dump($ltResult->fetchColumn());