DatafieldCategoryTable: fix SQL error on search

fixes #2367

doc/82-Changelog.md

@@ -30,6 +30,7 @@ next (will be 1.9.0)
 * FIX: allow switching DB config while connection is failing (#2300)
 * FIX: Links to duplicate services in Sets didn't check for deactivation (#2323)
 * FIX: SQL error for Data Fields table on PostgreSQL (#2310)
+* FIX: SQL error when searching for Data Field Categories (#2367)
 * FEATURE: show "deprecated" flag on object attribute inspection (#2312)
 * FEATURE: Service Template for single Host services provides auto-completion (#1974)
 

library/Director/Web/Table/DatafieldCategoryTable.php

@@ -5,15 +5,13 @@ namespace Icinga\Module\Director\Web\Table;
 use gipfl\IcingaWeb2\Link;
 use gipfl\IcingaWeb2\Table\ZfQueryBasedTable;
 use ipl\Html\Html;
-use Zend_Db_Adapter_Abstract as ZfDbAdapter;
-use Zend_Db_Select as ZfDbSelect;
 
 class DatafieldCategoryTable extends ZfQueryBasedTable
 {
-    protected $searchColumns = array(
-        'dfc.varname',
-        'dfc.caption',
-    );
+    protected $searchColumns = [
+        'dfc.category_name',
+        'dfc.description',
+    ];
 
     public function getColumns()
     {
@@ -45,10 +43,10 @@ class DatafieldCategoryTable extends ZfQueryBasedTable
 
     public function getColumnsToBeRendered()
     {
-        return array(
+        return [
             $this->translate('Category Name'),
             $this->translate('# Used'),
-        );
+        ];
     }
 
     public function prepareQuery()