Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/6281
@xndai The umbrella issue is
[FLINK-9749](https://issues.apache.org/jira/browse/FLINK-9749) and some parts
on the specifics of block formats (ORC / Parquet) are in
[FLINK-9753](https://issues.apache.org/jira/browse/FLINK-9753)---
