check all page names with tempalte
global $wpdb;
$sql = "SELECT post_title, meta_value
FROM $wpdb->posts a
JOIN $wpdb->postmeta b ON a.ID = b.post_id
WHERE a.post_type = 'page'
AND a.post_status = 'publish'
AND b.meta_key = '_wp_page_template'
";
$pages = $wpdb->get_results($sql);
echo '<pre>';
print_r($pages);
echo '</pre>';