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The following page has been changed by KevinFerguson:
http://wiki.apache.org/couchdb/View_server

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  === rereduce ===
  
+ When building a view, CouchDB will apply the {{{reduce}}} step directly to 
the output of the map step and the {{{rereduce}}} step to the output of a 
previous {{{reduce}}} step.
+ 
+ CouchDB will send a list of values, with no keys or document ids, to the 
rereduce step.
+ 
+ CouchDB sends:
+ 
+ {{{
+ ["rereduce",["function(k, v, r) { return sum(v); }"],[33,55,66]]
+ }}}
+ 
+ The view-server answers:
+ 
+ {{{
+ [true, [154]]
+ }}}
+ 
  === log ===
  
  At any time, the view-server may send some information that will be saved in 
CouchDB's log file. This is done by sending a special object with just one 
field, {{{log}}}, on a separate line.

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