Hi Flink Community, I'm new to this community but have been using Flink for a year or so. As a user, my team built stuff upon Flink stateful stream processing. We used to have a use case that we need a sorted map data structure to store our state, something like TreeMap in Java, to query higher/lower keys, do range queries, and etc. However, currently, we only have a MapState interface in Flink. We found RocksDB is kind of sorted storage in nature. To achieve our use case, we have to do some hacky tricks to bypass current limitations and use lower RocksDB features as a workaround to implement our own SortedMapState. I assume that there should be lots of other users who have the same use case, so I have a few questions here.
1. Do we have a feature like SortedMapState already in place, in development or in the future roadmap? 2. If not, could that be a good feature to have? and are there any other concerns? Just want to start a discussion here from a user perspective. If everything goes well, we are also interested in contributing back to the community. Best regards, Sean
