lib/sql_algebra/predicates/binary_predicate.rb


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class BinaryPredicate < Predicate
  attr_reader :attribute1, :attribute2
  
  def initialize(attribute1, attribute2)
    @attribute1, @attribute2 = attribute1, attribute2
  end
  
  def ==(other)
    super and
      (attribute1.eql?(other.attribute1) and attribute2.eql?(other.attribute2))
  end
  
  def to_sql(builder = ConditionsBuilder.new)
    builder.call do
      send(predicate_name, attribute1.to_sql(self), attribute2.to_sql(self))
    end
  end
end