fix: execute throws docrine exceptions not our wrapped ones

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Author: juliusknorr

lib/private/Files/Cache/Updater.php

@@ -27,6 +27,7 @@
  */
 namespace OC\Files\Cache;
 
+use Doctrine\DBAL\Exception\DeadlockException;
 use OC\DB\Exceptions\DbalException;
 use OC\Files\FileInfo;
 use OCP\Files\Cache\ICacheEntry;
@@ -260,7 +261,7 @@ private function correctParentStorageMtime($internalPath) {
 			if ($mtime !== false) {
 				try {
 					$this->cache->update($parentId, ['storage_mtime' => $mtime]);
-				} catch (DbalException $e) {
+				} catch (DeadlockException $e) {
 					// ignore the failure.
 					// with failures concurrent updates, someone else would have already done it.
 					// in the worst case the `storage_mtime` isn't updated, which should at most only trigger an extra rescan

lib/public/DB/QueryBuilder/IQueryBuilder.php

@@ -165,7 +165,7 @@ public function getState();
 	 *          to bridge old code to the new API
 	 *
 	 * @return IResult|int
-	 * @throws Exception since 21.0.0
+	 * @throws \Doctrine\DBAL\Exception since 21.0.0
 	 * @since 8.2.0
 	 * @deprecated 22.0.0 Use executeQuery or executeStatement
 	 */