From e61cb71c17e16342af556bacb7c8d98935f71752 Mon Sep 17 00:00:00 2001
From: Eric Lippmann <eric.lippmann@icinga.com>
Date: Tue, 16 Jul 2019 14:25:03 +0200
Subject: [PATCH] Use unique values for combined AND group membership filters

---
 .../library/Monitoring/Backend/Ido/Query/IdoQuery.php           | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php
index 723227a4a..7a39f48d1 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/IdoQuery.php
@@ -560,7 +560,7 @@ abstract class IdoQuery extends DbQuery
         if (count($expr) === 1 && strpos($expr[0], '&') !== false) {
             // Our current filter implementation does not specify & as a control character so the count of the
             // expression array is always one in this case
-            $expr = explode('&', $expr[0]);
+            $expr = array_unique(explode('&', $expr[0]));
             $subQueryFilter->setExpression($expr);
             $and = true;
         } else {