If I create a table that has a map<string, string> field, will ORC files columnarize by the keys in the map? Or will all the pairs in the map be grouped together?
My goal is to columnarize the storage of a variable number of fields (where the names and number of fields are unknown at schema creation). It does not appear to be possible with RCFILE, and I'm curious if ORC just adds better type support, or if they also columnarize the fields within complex types. Thanks, Sean
