UpdatedIdListProvider.php

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<?php
namespace Magento\Sales\Model\ResourceModel\Provider;

use Magento\Framework\App\ResourceConnection;
use Magento\Framework\DB\Adapter\AdapterInterface;

class UpdatedIdListProvider implements NotSyncedDataProviderInterface
{
    private $resourceConnection;

    private $connection;

    public function __construct(
        ResourceConnection $resourceConnection
    ) {
        $this->resourceConnection = $resourceConnection;
    }

    public function getIds($mainTableName, $gridTableName)
    {
        $mainTableName = $this->resourceConnection->getTableName($mainTableName);
        $gridTableName = $this->resourceConnection->getTableName($gridTableName);
        $select = $this->getConnection()->select()
            ->from($mainTableName, [$mainTableName . '.entity_id'])
            ->joinLeft(
                [$gridTableName => $gridTableName],
                sprintf(
                    '%s.%s = %s.%s',
                    $mainTableName,
                    'entity_id',
                    $gridTableName,
                    'entity_id'
                ),
                []
            )
            ->where($gridTableName . '.entity_id IS NULL');

        return $this->getConnection()->fetchAll($select, [], \Zend_Db::FETCH_COLUMN);
    }

    private function getConnection()
    {
        if (!$this->connection) {
            $this->connection = $this->resourceConnection->getConnection('sales');
        }

        return $this->connection;
    }
}