From a0b8829f8191309f3915f9ac4455244ff5e98784 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Mon, 12 Sep 2022 08:53:08 +0200
Subject: [PATCH] FilterExpression: Perform a null check if `*`

---
 library/Icinga/Data/Filter/FilterExpression.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/library/Icinga/Data/Filter/FilterExpression.php b/library/Icinga/Data/Filter/FilterExpression.php
index 73fb62536c..6a9a880955 100644
--- a/library/Icinga/Data/Filter/FilterExpression.php
+++ b/library/Icinga/Data/Filter/FilterExpression.php
@@ -173,6 +173,10 @@ public function matches($row)
             return false;
         }
 
+        if (trim($this->expression) === '*') {
+            return $rowValue !== null;
+        }
+
         if ($this->caseSensitive) {
             $expression = $this->expression;
         } else {