Re: [Neo4j] Paths with null?
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.comwrote: 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.comwrote: 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
Re: [Neo4j] Paths with null?
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.comwrote: 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.comwrote: 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.comwrote: 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
Re: [Neo4j] Paths with null?
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.comwrote: 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
Re: [Neo4j] Paths with null?
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.comwrote: 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] Paths with null?
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
