evetion opened a new issue, #384:
URL: https://github.com/apache/arrow-julia/issues/384
I'm trying to implement the GeoArrow spec, which gives back coordinates in a
deeply nested list of a FixedList (a point). Because these lists are
theoretically nullable, in Julia we get an deeply nested list with `Union`s of
`Missing`, even though these vectors contain no `missing`s. An example for a
column of LineStrings (there are geometry types that require two more levels of
nesting):
```2-element Arrow.List{Vector{Union{Missing, Vector{Union{Missing,
Tuple{Float64, Float64}}}}}```
It's pretty hard to convert these elements to a concrete
`Vector{Vector{NTuple, Float64}}` without allocating. Is there a way to edit
the view to be non missing? An alternative way would be to pass
`all(validitybitmap)` in `build` to `juliaeltype`, so we only set Missing when
there are actual missing values.
I'm happy to make a PR if there's consensus on what to do.
Might be related to #373.
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