quote_string

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 374
      def quote_string(s) #:nodoc:
        if PGconn.respond_to?(:escape)
          self.class.instance_eval do
            define_method(:quote_string) do |s|
              PGconn.escape(s)
            end
          end
        else
          # There are some incorrectly compiled postgres drivers out there
          # that don't define PGconn.escape.
          self.class.instance_eval do
            remove_method(:quote_string)
          end
        end
        quote_string(s)
      end