polybase: allow s3 as external data source
For building an on prem dwh it would be great, if polybase could add s3 as external data source. External tables could be used as the staging area and s3 object storage (e.g. open source minio) for the Persistent Staging Area (psa). Gzipped csv or parquet ly on s3 and could be queried on demand as a long time storage.