Reminds me of: http://qconlondon.com/london-2009/presentation/Null+References:+The+Billion+Dollar+Mistake
On 15 November 2011 08:15, Peter Neubauer <peter.neuba...@neotechnology.com>wrote: > The void is spreading. Beware. > > Cheers, > > /peter neubauer > > GTalk: neubauer.peter > Skype peter.neubauer > Phone +46 704 106975 > LinkedIn http://www.linkedin.com/in/neubauer > Twitter http://twitter.com/peterneubauer > > http://www.neo4j.org - NOSQL for the Enterprise. > http://startupbootcamp.org/ - Öresund - Innovation happens HERE. > > > On Tue, Nov 15, 2011 at 8:50 AM, Mattias Persson > <matt...@neotechnology.com>wrote: > > > That may be a good solution, because you could not treat such a path (if > it > > were to have null in it somewhere) in a normal fashion anyway. > > > > 2011/11/15 Andres Taylor <andres.tay...@neotechnology.com> > > > > > I just realized the obviousness of the truth. > > > > > > The optional bit is viral - it spreads out if it can. So, a path > pointing > > > to an optional relationship, is it self optional. Just like nodes > hanging > > > from an optional relationship are also optional. > > > So, if the path happens to have any null parts, the whole path is null. > > > > > > Makes sense? > > > > > > Andrés > > > > > > On Sun, Nov 13, 2011 at 1:11 PM, Mattias Persson > > > <matt...@neotechnology.com>wrote: > > > > > > > A Path with null in it doesn't make much sense to me. I'd prefer b) > > also. > > > > > > > > Den lördagen den 12:e november 2011 skrev Andres Taylor< > > > > andres.tay...@neotechnology.com>: > > > > > On Sat, Nov 12, 2011 at 3:02 PM, D. Frej <dieter_f...@gmx.net> > > wrote: > > > > > > > > > >> to understand the question correctly: is it something like > > > > >> (a)-[:REL_TYPE*0..1]->(b) > > > > >> > > > > > > > > > > Sorry for not being clearer... > > > > > > > > > > No, that pattern is safe - it will never contain a null. The > optional > > > > > relationships have a question mark in them, like this: > > > > > > > > > > (a)-[?:REL_TYPE]->(b) > > > > > > > > > > Andrés > > > > > _______________________________________________ > > > > > Neo4j mailing list > > > > > User@lists.neo4j.org > > > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > > > > > > > > -- > > > > Mattias Persson, [matt...@neotechnology.com] > > > > Hacker, Neo Technology > > > > www.neotechnology.com > > > > _______________________________________________ > > > > Neo4j mailing list > > > > User@lists.neo4j.org > > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > > _______________________________________________ > > > Neo4j mailing list > > > User@lists.neo4j.org > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > > > > > > -- > > Mattias Persson, [matt...@neotechnology.com] > > Hacker, Neo Technology > > www.neotechnology.com > > _______________________________________________ > > Neo4j mailing list > > User@lists.neo4j.org > > https://lists.neo4j.org/mailman/listinfo/user > > > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
