property.php

См. документацию.

<?php
 
namespace Bitrix\Sale;
 
use Bitrix\Main;
use Bitrix\Sale\Internals\OrderPropsRelationTable;
use Bitrix\Sale\Internals\OrderPropsTable;

class Property extends PropertyBase
{
    protected function loadRelations()
    {
        $relations = [];
 
        $dbRes = OrderPropsRelationTable::getList([
            'select' => ['ENTITY_ID', 'ENTITY_TYPE'],
            'filter' => [
                '=PROPERTY_ID' => $this->getId(),
                '@ENTITY_TYPE' => ['P', 'D']
            ]
        ]);
 
        while ($data = $dbRes->fetch())
        {
            $relations[] = $data;
        }
 
        return $relations;
    }
}