set

# File activerecord/lib/arel/update_manager.rb, line 18
    def set(values)
      case values
      when String, Nodes::BoundSqlLiteral
        @ast.values = [values]
      else
        @ast.values = values.map { |column, value|
          Nodes::Assignment.new(
            Nodes::UnqualifiedColumn.new(column),
            value
          )
        }
      end
      self
    end