Why cannot do range query on composite key? #fabric #fabric-questions

Yueming Xu

I see that fabric-chaincode-go implementation limits GetStateByRange to only simple keys. However, it would be nice if I can get a set of composite keys by range and then fetch corresponding state data by using the state key embedded in the returned composite keys. 

Is this a limitation of how composite keys are implemented, or is it a limitation of the fabric-chaincode-go package only?