Neville Dipale created ARROW-5408:
-------------------------------------

             Summary: [Rust] Create struct array builder that creates null 
buffers
                 Key: ARROW-5408
                 URL: https://issues.apache.org/jira/browse/ARROW-5408
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Rust
            Reporter: Neville Dipale


We currently have a way of creating a struct array from a list of (field, 
array) tuples. This does not create null buffers for the struct (because no 
index is null). While this works fine for Rust, it often leads to incompatible 
data with IPC data and kernel function outputs.

Having a function that caters for nulls, or expanding the current one, would 
alleviate this issue.



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