Type variation in substrait: Hardcoding the numbers isn't really the proper way to do type variations. #12355
Description
FWIW, hardcoding the numbers isn't really the proper way to do type variations. (Rather we should add the variation as an extension and refer to the extension's id.) However, given this is already used for default vs large, I guess adding view makes sense - and they can all be migrated at once to the proper way someday.
Originally posted by @Blizzara in #12199 (comment)
The idea here is for someone to research how this is supposed to work and then change the datafusion substrait implementation to do it