Why do you need such a way? If you have some certain list of operations to perform on each object, you can just combine them inside a body of a single map function.
If this list is dynamic and may vary depending on a situation – you can pass the list of functions to execute as the second parameter to the map function. On the contrary, reduce functions cannot be combined like that – you generally need to gather all the results of a previous reduce to get a consistent result of the next one. So, multiple reduce functions are not just allowed, but sometimes even necessary. On Fri, Oct 28, 2011 at 5:59 PM, Lyes zaiko <lyes...@gmail.com> wrote: > Hi all! > I want to execute a mapreduce query, in erlang, that contains two map phases > such that the Map2 function takes the result of the Map1 function as input. > Is it possible and if, what must be the return value of each map phase > Thank you! > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > -- Best regards, Dmitry Demeshchuk _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
