LayoutWriter doesn't respect validity of the top level Struct array

[robert3005]

Right now if StructArray has top level validity that's not AllValid or NonNullable the validity is discarded

[doki23]

Could you please provide more details? I'm interested in this issue and would like to attempt to resolve it.

[robert3005]

This is likely not a good first issue. The solution here is likely to either forbid writing top level structs with validity other than nonnullable and provide a function to push validity of the struct to the children, i.e. run a filter. Alternatively we need to teach column layout about one extra validity array which shouldn't be bad but likely unnecessary