to_sql

# File activerecord/lib/active_record/relation.rb, line 603
    def to_sql
      @to_sql ||= begin
                    relation   = self
                    connection = klass.connection
                    visitor    = connection.visitor

                    if eager_loading?
                      find_with_associations { |rel| relation = rel }
                    end

                    binds = relation.bound_attributes
                    binds = connection.prepare_binds_for_database(binds)
                    binds.map! { |value| connection.quote(value) }
                    collect = visitor.accept(relation.arel.ast, Arel::Collectors::Bind.new)
                    collect.substitute_binds(binds).join
                  end
    end