add TODO about all docs constant

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@499440 13f79535-47bb-0310-9956-ffa450edef68

client/ruby/solrb/lib/solr/request/select.rb

@@ -16,6 +16,10 @@ module Solr
   module Request
     # "Abstract" base class, only useful with subclasses that add parameters
     class Select < Solr::Request::Base
+      
+      # TODO add a constant for the all-docs query, which currently is [* TO *]
+      #      (caveat, that is all docs that have a value in the default field)
+      #      When the Lucene JAR is upgraded in Solr, the all-docs query becomes simply *
       attr_reader :query_type
       
       def initialize(qt=nil)