I haven’t timed the queries but there’s way more than 4 queries to be done.
For instance if I build a drill-down to zoom in on my city (Bordeaux), I would need to build something like this : Aquitaine (administrative_area_level_1) Gironde (administrative_area_level_2) Bordeaux (locality) Talence etc. So to build the whole tree I’d need to do nested loops over the first two fields (administrative_area_level_1 & administrative_area_level_2). Assuming there’s N administrative_area_level_1 and M administrative_area_level_2, I’d need N*M queries to list all localities. That seems a bit brutish. I’ve read a bit about nested_queries in web2py but there isn’t much to be found. Is it a deprecated mechanism ? Should I use rows.find() & rows.sort() then ? > Le 11 févr. 2015 à 20:28, Niphlod <niph...@gmail.com> a écrit : > > did you actually timed the queries ? without knowing the cardinality of the > sets, it's pretty impossible to say that a single big-query will be more > efficient than 4 on small subsets. > > -- > Resources: > - http://web2py.com <http://web2py.com/> > - http://web2py.com/book <http://web2py.com/book> (Documentation) > - http://github.com/web2py/web2py <http://github.com/web2py/web2py> (Source > code) > - https://code.google.com/p/web2py/issues/list > <https://code.google.com/p/web2py/issues/list> (Report Issues) > --- > You received this message because you are subscribed to a topic in the Google > Groups "web2py-users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/web2py/yF1UHKQqseI/unsubscribe > <https://groups.google.com/d/topic/web2py/yF1UHKQqseI/unsubscribe>. > To unsubscribe from this group and all its topics, send an email to > web2py+unsubscr...@googlegroups.com > <mailto:web2py+unsubscr...@googlegroups.com>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
