diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentQuery.php
index e826f16a6..ea2a656fa 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentQuery.php
@@ -55,6 +55,20 @@ class CommentQuery extends IdoQuery
      */
     protected $subQueries = array();
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentdeletionhistoryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentdeletionhistoryQuery.php
index 30be5c400..6658d92cc 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentdeletionhistoryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommentdeletionhistoryQuery.php
@@ -58,6 +58,20 @@ class CommentdeletionhistoryQuery extends IdoQuery
      */
     protected $fetchHistoryColumns = false;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommenthistoryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommenthistoryQuery.php
index b8fdd72a4..687cd9a00 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommenthistoryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/CommenthistoryQuery.php
@@ -58,6 +58,20 @@ class CommenthistoryQuery extends IdoQuery
      */
     protected $fetchHistoryColumns = false;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeQuery.php
index 420559ba8..2c97698e6 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeQuery.php
@@ -60,6 +60,20 @@ class DowntimeQuery extends IdoQuery
      */
     protected $subQueries = array();
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeendhistoryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeendhistoryQuery.php
index 08b6cec01..110e7bfae 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeendhistoryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimeendhistoryQuery.php
@@ -58,6 +58,20 @@ class DowntimeendhistoryQuery extends IdoQuery
      */
     protected $fetchHistoryColumns = false;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimestarthistoryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimestarthistoryQuery.php
index e312480e7..0799df17c 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimestarthistoryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/DowntimestarthistoryQuery.php
@@ -58,6 +58,20 @@ class DowntimestarthistoryQuery extends IdoQuery
      */
     protected $fetchHistoryColumns = false;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/EventhistoryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/EventhistoryQuery.php
index c9acd16fc..076be4384 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/EventhistoryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/EventhistoryQuery.php
@@ -75,6 +75,20 @@ class EventhistoryQuery extends IdoQuery
         $this->joinedVirtualTables['eventhistory'] = true;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/HostgroupsummaryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/HostgroupsummaryQuery.php
index ce5e0f85b..32f91e324 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/HostgroupsummaryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/HostgroupsummaryQuery.php
@@ -66,6 +66,20 @@ class HostgroupsummaryQuery extends IdoQuery
      */
     protected $subQueries = array();
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/HoststatussummaryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/HoststatussummaryQuery.php
index da065d184..9796ae8e7 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/HoststatussummaryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/HoststatussummaryQuery.php
@@ -34,6 +34,14 @@ class HoststatussummaryQuery extends IdoQuery
      */
     protected $subSelect;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        return $this->subSelect->allowsCustomVars();
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/NotificationQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/NotificationQuery.php
index a459a4187..1afd06340 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/NotificationQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/NotificationQuery.php
@@ -129,6 +129,20 @@ class NotificationQuery extends IdoQuery
         $this->notificationQuery->union(array($services), Zend_Db_Select::SQL_UNION_ALL);
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicegroupsummaryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicegroupsummaryQuery.php
index a4c763562..04688fbd4 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicegroupsummaryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicegroupsummaryQuery.php
@@ -58,6 +58,20 @@ class ServicegroupsummaryQuery extends IdoQuery
      */
     protected $subQueries = array();
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicestatussummaryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicestatussummaryQuery.php
index 325203717..81e3b50e9 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicestatussummaryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/ServicestatussummaryQuery.php
@@ -46,6 +46,14 @@ class ServicestatussummaryQuery extends IdoQuery
      */
     protected $subSelect;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        return $this->subSelect->allowsCustomVars();
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatehistoryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatehistoryQuery.php
index 41f18572b..a29d61acc 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatehistoryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatehistoryQuery.php
@@ -58,6 +58,20 @@ class StatehistoryQuery extends IdoQuery
      */
     protected $fetchHistoryColumns = false;
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatussummaryQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatussummaryQuery.php
index e138a3f5e..80dd5f709 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatussummaryQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/StatussummaryQuery.php
@@ -130,6 +130,20 @@ We have to find a better solution here.
      */
     protected $subQueries = array();
 
+    /**
+     * {@inheritdoc}
+     */
+    public function allowsCustomVars()
+    {
+        foreach ($this->subQueries as $query) {
+            if (! $query->allowsCustomVars()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * {@inheritdoc}
      */