Amazon S3 now provides the restore status of objects stored in Amazon S3 Glacier Flexible Retrieval and Amazon S3 Glacier Deep Archive using the S3 LIST API. This new information in S3 LIST API responses can be integrated into your applications, helping you identify and access restored objects from S3 Glacier. For example, S3 Glacier restore status is now integrated into Amazon Athena, so you can run queries against your restored data from low-cost S3 Glacier storage classes.
Source:: Amazon AWS