diff --git a/library/Director/Web/Table/DbHelper.php b/library/Director/Web/Table/DbHelper.php
new file mode 100644
index 00000000..1a76db20
--- /dev/null
+++ b/library/Director/Web/Table/DbHelper.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Table;
+
+trait DbHelper
+{
+    public function dbHexFunc($column)
+    {
+        if ($this->isPgsql()) {
+            return sprintf("LOWER(ENCODE(%s, 'hex'))", $column);
+        } else {
+            return sprintf("LOWER(HEX(%s))", $column);
+        }
+    }
+
+    public function quoteBinary($binary)
+    {
+        if ($this->isPgsql()) {
+            return new Expr("'\\x" . bin2hex($binary) . "'");
+        }
+
+        return $binary;
+    }
+
+    public function isPgsql()
+    {
+        return $this->db->getConfig() instanceof \Zend_Db_Adapter_Pdo_Pgsql;
+    }
+
+    public function isMysql()
+    {
+        return $this->db->getConfig() instanceof \Zend_Db_Adapter_Pdo_Mysql;
+    }
+
+    public function wantBinaryValue($value)
+    {
+        if (is_resource($value)) {
+            return stream_get_contents($value);
+        }
+
+        return $value;
+    }
+}