GitHub user yangxk1 added a comment to the discussion: Any plans to add 
narrower ints (Int8/Int16) and unsigned (UInt8/16/32/64)?

Thanks for your interest in GraphAr.
imo, GAR is based on Apache Arrow. Since Arrow already supports unsigned types 
and int8/int16, adding support for these types in GraphAr only requires 
updating 
[types.cc](https://github.com/apache/incubator-graphar/blob/main/cpp/src/graphar/types.cc).
Whether they are supported at the physical level depends on the chosen storage 
format (CSV/Parquet/ORC). For example, int8 and int16 can be stored in ORC 
([reference](https://orc.apache.org/docs/types.html)).

I noticed that miniGU is a rust repository,the arrow also has a rust version 
:https://arrow.apache.org/rust/arrow/index.html


GitHub link: 
https://github.com/apache/incubator-graphar/discussions/744#discussioncomment-14307341

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