extract_record

# File activerecord/lib/active_record/associations/join_dependency/join_part.rb, line 48
        def extract_record(row, column_names_with_alias)
          # This code is performance critical as it is called per row.
          # see: https://github.com/rails/rails/pull/12185
          hash = {}

          index = 0
          length = column_names_with_alias.length

          while index < length
            column_name, alias_name = column_names_with_alias[index]
            hash[column_name] = row[alias_name]
            index += 1
          end

          hash
        end