neopaf commented on issue #1644: URL: https://github.com/apache/orc/issues/1644#issuecomment-1790207301
@guiyanakuang thanks for the doc link and root-structure explanation. A bit fog left in "array" part: > Lists always have a single child column for the element values Regretfully I don't get it :( Simplifying: * data: array<v:int> I understand it this way: 1. root structure 2. data array 3. v Yet I'm still in the dark as to how array is stored: Records: * 1 * 2 Storage columns 1. something about root structure << what is here? 2. something about array << what is here? 3. [1,2] packed according to selected method (may it be DIRECT, DICTIONARY, or what was decided) Maybe there is a good reading material on this? (thanks a ton, for helping!) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
