alf-tool/alf-sql

module Alf
  class Predicate
    module NadicBool

      def to_sql(buffer = "")
        each_with_index do |child, index|
          next if index == 0
          unless index == 1
            buffer << Sql::Expr::SPACE << to_sql_operator << Sql::Expr::SPACE
          end
          child.to_sql(buffer)
        end
        buffer
      end

    end
  end
end