fallintoplace commented on PR #988:
URL: https://github.com/apache/arrow-go/pull/988#issuecomment-5060898407

   The concrete case is projecting or removing all columns while retaining row 
cardinality. Arrow models the record batch length independently from its 
fields, so a zero-column batch can still represent N rows. Arrow Go already 
supports constructing, filtering, serializing, and reading those batches.


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