Improve sql query performance by removing unused payload

Signed-off-by: Daniel Starzmann <daniel@starze.de>

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is mostly based on [Keep a Changelog](https://keepachangelog.com/en/1
 ### Changed
 
 ### Fixed
+- Improve performance of item updates (#1322)
 
 # Releases
 ## [21.2.0-beta2] - 2023-04-05

lib/Db/ItemMapperV2.php

@@ -314,7 +314,7 @@ class ItemMapperV2 extends NewsMapperV2
     {
         $builder = $this->db->getQueryBuilder();
 
-        $builder->select('items.*')
+        $builder->select('items.id')
                 ->from($this->tableName, 'items')
                 ->innerJoin('items', FeedMapperV2::TABLE_NAME, 'feeds', 'items.feed_id = feeds.id')
                 ->where('feeds.user_id = :userId')

tests/Unit/Db/ItemMapperTest.php

@@ -419,7 +419,7 @@ class ItemMapperTest extends MapperTestUtility
 
         $this->builder->expects($this->once())
             ->method('select')
-            ->with('items.*')
+            ->with('items.id')
             ->will($this->returnSelf());
 
         $this->builder->expects($this->once())