# File lib/searchlogic/active_record/named_scope_tools.rb, line 85
      def inner_polymorphic_join(target, options = {})
        options[:on] ||= table_name
        options[:on_table_name] ||= connection.quote_table_name(options[:on])
        options[:target_table] ||= connection.quote_table_name(target.to_s.pluralize)
        options[:as] ||= "owner"
        postgres = ::ActiveRecord::Base.connection.adapter_name == "PostgreSQL"
        "INNER JOIN #{options[:target_table]} ON #{options[:target_table]}.id = #{options[:on_table_name]}.#{options[:as]}_id AND " +
          "#{options[:on_table_name]}.#{options[:as]}_type = #{postgres ? "E" : ""}'#{target.to_s.camelize}'"
      end