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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/03 20:36:52 UTC

[GitHub] [arrow-rs] tustvold commented on issue #1637: UnionBuilder produces incorrect Union DataType

tustvold commented on issue #1637:
URL: https://github.com/apache/arrow-rs/issues/1637#issuecomment-1116585759

   I think automatically determining the nullability of the field based on if that child contains nulls makes a lot of sense, however, it could cause schema-volatility depending on if the written data happens to contain nulls which seems sub-optimal.
   
   I think the safest thing is probably to do what `GenericListBuilder` does and always set nullable to true, but it does feel a bit off...


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