I was referring to http://guides.rubyonrails.org/caching_with_rails.html#sql-caching http://guides.rubyonrails.org/caching_with_rails.html#sql-ca... I'm not s

I was referring to http://guides.rubyonrails.org/caching_with_rails.html#sql-caching http://guides.rubyonrails.org/caching_with_rails.html#sql-ca... I'm not sure when this was added. v3 or v4?