Alex Levenson

Thanks

@goodtft will you be releasing an update that supports newer versions of Raspbian?

I'm actually not sure we need this, so holding off for now

I think we might need more discussion of how we want projects into unions to work. I don't think all object models can return an "empty" union (eg thrift). Additionally,...

I'm not sure if I'm being clear, let me use an example of the issues we've seen with thrift union support. 1) Selecting only columns from 1 "wing" of a...

Oh, and, that's why filtering the "unknowns" (the is this a dog or a turtle case) away _sort of_ makes sense? Like, the user didn't ask for any dog/turtle columns...

One more thing I should probably clarify -- this would be pretty easy if thrift represented unions the way they look in the above schema definition, we could just return...

I'm not at a computer now but I will reply tonight. We can't return NULL for an option union even, as that's not really correct -- that union wasn't null...

I still have some reservations about this. I think an expected contract (but maybe not an explicit contract) that we have is that changing your projection shouldn't change your results,...

Another thing to consider about adding first class support for unions is efficiency. We've found that parquet pays a pretty high cost reading nulls, especially in large schemas made up...