Actually, "pointer type" might just be another name for "dictionary type".
Regards Antoine. Le 30/04/2018 à 22:08, Antoine Pitrou a écrit : > > Hi, > > Today I got the opportunity to talk with Jim Pivarski, the main > developer on the OAMap project (*). Under the hood, he is doing > something not unlike the Arrow representation of nested arrays: he > stores and processes structured data as linear arrays, allowing very > fast processing on seemingly irregular data (in Array parlance, think > something like lists of lists of structs). It seems that OAMap data > requires two kinds of logical types that Arrow misses : > > - a pointer type, where a physical array of ints is used to represent > indices into another array (the logical value being of course the value > pointed to) > - a span type, where two physical arrays of ints are used to represent > start and stop indices into another array (the logical value being the > list of values delimited by the start / stop indices) > > Did such a feature request already come by? Is this something we should > add to our roadmap or future wishlist? > > (*) https://github.com/diana-hep/oamap > > Regards > > Antoine. >
