SQLServer: resolve column aliasing/quoting collision when using limit or...

SQLServer: resolve column aliasing/quoting collision when using limit or offset in an eager find.  References #2974.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3184 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* SQLServer: resolve column aliasing/quoting collision when using limit or offset in an eager find.  #2974 [kajism@yahoo.com]
+
 * Reloading a model doesn't lose track of its connection.  #2996 [junk@miriamtech.com, Jeremy Kemper]
 
 * Fixed bug where using update_attribute after pushing a record to a habtm association of the object caused duplicate rows in the join table. #2888 [colman@rominato.com, Florian Weber]

activerecord/lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -356,7 +356,12 @@ def add_limit_offset!(sql, options)
           if options[:order]
             options[:order] = options[:order].split(',').map do |field|
               parts = field.split(" ")
-              if sql =~ /#{parts[0]} AS (t\d_r\d\d?)/
+              tc = parts[0]
+              if sql =~ /\.\[/ and tc =~ /\./ # if column quoting used in query
+                tc.gsub!(/\./, '\\.\\[')
+                tc << '\\]'
+              end
+              if sql =~ /#{tc} AS (t\d_r\d\d?)/
                   parts[0] = $1
               end
               parts.join(' ')