Keep compatibility with Icinga DB v6

application/controllers/ServiceController.php

@@ -54,7 +54,7 @@ public function init()
                 Filter::equal('host.name', $hostName)
             ));
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $query->withColumns(['has_problematic_parent']);
         }
 

library/Icingadb/Common/Backend.php

@@ -29,6 +29,9 @@ final class Backend
     /** @var ?IcingaRedis */
     private static $redis;
 
+    /** @var ?bool Whether the current Icinga DB version supports dependencies */
+    private static $supportsDependencies;
+
     /**
      * Set the connection to the Icinga DB
      *
@@ -165,4 +168,22 @@ public static function getRedis(): IcingaRedis
 
         return self::$redis;
     }
+
+    /**
+     * Whether the current Icinga DB version supports dependencies
+     *
+     * @return bool
+     */
+    public static function supportsDependencies(): bool
+    {
+        if (self::$supportsDependencies === null) {
+            if (self::getDb()->getAdapter() instanceof Pgsql) {
+                self::$supportsDependencies = self::getDbSchemaVersion() >= 5;
+            } else {
+                self::$supportsDependencies = self::getDbSchemaVersion() >= 7;
+            }
+        }
+
+        return self::$supportsDependencies;
+    }
 }

library/Icingadb/Model/Host.php

@@ -116,7 +116,7 @@ public function getColumns()
             'command_endpoint_id'
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns[] = 'affected_children';
         }
 
@@ -166,7 +166,7 @@ public function getColumnDefinitions()
             'command_endpoint_id'       => t('Endpoint Id')
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns['affected_children'] = t('Affected Children');
         }
 

library/Icingadb/Model/HostState.php

@@ -57,7 +57,7 @@ public function getColumnDefinitions()
             'next_update'                   => t('Host Next Update')
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns['affects_children'] = t('Host Affects Children');
         }
 

library/Icingadb/Model/Service.php

@@ -109,7 +109,7 @@ public function getColumns()
             'command_endpoint_id'
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns[] = 'affected_children';
         }
 
@@ -156,7 +156,7 @@ public function getColumnDefinitions()
             'command_endpoint_id'       => t('Endpoint Id'),
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns['affected_children'] = t('Affected Children');
         }
 
@@ -207,7 +207,7 @@ public function createBehaviors(Behaviors $behaviors)
             'command_endpoint_id'
         ]));
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $behaviors->add(new HasProblematicParent());
         }
     }

library/Icingadb/Model/ServiceState.php

@@ -59,7 +59,7 @@ public function getColumnDefinitions()
             'next_update'                   => t('Service Next Update')
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns['affects_children'] = t('Service Affects Children');
         }
 

library/Icingadb/Model/State.php

@@ -103,7 +103,7 @@ public function getColumns()
             'next_update'
         ];
 
-        if (Backend::getDbSchemaVersion() >= 6) {
+        if (Backend::supportsDependencies()) {
             $columns[] = 'affects_children';
         }
 

library/Icingadb/Widget/Detail/ObjectDetail.php

@@ -619,7 +619,7 @@ protected function fetchCustomVars()
      */
     protected function createRootProblems(): ?array
     {
-        if (Backend::getDbSchemaVersion() < 6) {
+        if (! Backend::supportsDependencies()) {
             if ($this->object->state->is_reachable) {
                 return null;
             }