From f52b2b03c651dfcd88afd999cce769255f64ebbf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20M=C3=BCller?=
 <1005065+DeepDiver1975@users.noreply.github.com>
Date: Mon, 28 Nov 2022 10:01:49 +0100
Subject: [PATCH] fix: optimize preview cleanup sql

---
 lib/private/PreviewCleanup.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/private/PreviewCleanup.php b/lib/private/PreviewCleanup.php
index 5b2b29fca0cb..94932fb8e30f 100644
--- a/lib/private/PreviewCleanup.php
+++ b/lib/private/PreviewCleanup.php
@@ -80,7 +80,7 @@ private function queryPreviewsToDelete(int $startFileId = 0, int $chunkSize = 10
 		$sql = "select `fileid`, `name`, `user_id` from `*PREFIX*filecache` `fc`
 join `*PREFIX*mounts` on `storage` = `storage_id`
 where `parent` in (select `fileid` from `*PREFIX*filecache` where `storage` in (select `numeric_id` from `oc_storages` where `id` like 'home::%' or `id` like 'object::user:%') and `path` = 'thumbnails')
-  and not exists(select `fileid` from `*PREFIX*filecache` where `fc`.`name` = CAST(`*PREFIX*filecache`.`fileid` as CHAR(24)))
+  and `fc`.`fileid` not in (select `fileid` from `*PREFIX*filecache` where `fc`.`name` = CAST(`*PREFIX*filecache`.`fileid` as CHAR(24)))
   and `fc`.`fileid` > ?
   order by `user_id`, `fileid`";