mergetrait.php

См. документацию.

<?php

 
namespace Bitrix\Main\ORM\Data\Internal;
 
trait MergeTrait
{
    public static function merge(array $insertFields, array $updateFields, ?array $uniqueFields = null)
    {
        $entity = static::getEntity();
        $conn = $entity->getConnection();
        $primary = ($uniqueFields ?? $entity->getPrimaryArray());
 
        $sql = $conn->getSqlHelper()->prepareMerge(static::getTableName(), $primary, $insertFields, $updateFields);
 
        $conn->queryExecute(current($sql));
 
        static::cleanCache();
    }
}