From 7680d44ef21d3a8eec3e564516b348e0feb87e28 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@madoka.volgo-balt.ru>
Date: Wed, 15 Jul 2015 13:29:03 +0300
Subject: [PATCH] purge_orphans: optimize the query, maybe
 https://tt-rss.org/forum/viewtopic.php?f=1&t=3417&p=20408#p20407

---
 include/functions.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/functions.php b/include/functions.php
index 22179e1a..e5f2ca48 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -320,7 +320,7 @@
 
 		// purge orphaned posts in main content table
 		$result = db_query("DELETE FROM ttrss_entries WHERE
-			(SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
+			NOT EXISTS (SELECT ref_id FROM ttrss_user_entries WHERE ref_id = id)");
 
 		if ($do_output) {
 			$rows = db_affected_rows($result);