>
> First of all I would like to ask why we use both type_codes and child_ids
> for Union types. It seems that we can already cover the logical types a
> union has using type_codes alone. What’s the point of using child_ids?
The two are inverses of each other:
https://github.com/apache/arrow/blob
The work of converting Arrow Arrays, ChunkedArrays, RecordBatches and Tables to
ORC files is about 50% done. Now I have two questions.
First of all I would like to ask why we use both type_codes and child_ids for
Union types. It seems that we can already cover the logical types a union has
usin
