Set Join in SearchCriteria select

Question

I need to override the get orders list API call, and set a join with my custom table, but without loose the SearchCriteria terms, is this possible?

Current Code: (I've created a plugin in Magento\Sales\Api\OrderRepositoryInterface inside webapi_rest folder.)

public function aroundGetList
(
    \Magento\Sales\Api\OrderRepositoryInterface $subject,
    callable $proceed,
    \Magento\Framework\Api\SearchCriteriaInterface $searchCriteria
){
    $searchResult = $this->searchResultFactory->create();
    $this->collectionProcessor->process($searchCriteria, $searchResult);
    $searchResult->setSearchCriteria($searchCriteria);
    foreach ($searchResult->getItems() as $order) {
        $this->setShippingAssignments($order);
    }
    return $searchResult;

}

Answer 1

I solve this situation as following:

$searchResult->getSelect()->joinLeft(
        array('my_table'=>'myAlias'),
        'main_table.entity_id = myAlias.id',
        []
    );