Move "OPTIMIZE TABLE" to own Database function

src/Database/Database.php

@@ -1758,6 +1758,19 @@ class Database
 		return (['list' => $statelist, 'amount' => $processes]);
 	}
 
+	/**
+	 * Optimizes tables
+	 *
+	 * @param string $table a given table
+	 *
+	 * @return bool True, if successfully optimized, otherwise false
+	 * @throws \Exception
+	 */
+	public function optimizeTable(string $table): bool
+	{
+		return $this->e("OPTIMIZE TABLE " . DBA::buildTableString([$table])) !== false;
+	}
+
 	/**
 	 * Fetch a database variable
 	 *

src/Federation/Repository/DeliveryQueueItem.php

@@ -108,6 +108,6 @@ final class DeliveryQueueItem extends \Friendica\BaseRepository
 
 	public function optimizeStorage(): bool
 	{
-		return $this->db->e("OPTIMIZE TABLE " . DBA::buildTableString([self::$table_name]));
+		return $this->db->optimizeTable(self::$table_name);
 	}
 }