# File lib/thinking_sphinx/source.rb, line 55
    def to_riddle_for_delta(offset, position)
      source = Riddle::Configuration::SQLSource.new(
        "#{index.delta_name}_#{position}", adapter.sphinx_identifier
      )
      source.parent = "#{index.core_name}_#{position}"
      
      set_source_database_settings  source
      set_source_attributes         source, offset, true
      set_source_settings           source
      set_source_sql                source, offset, true
      
      source
    end