visit_Arel_Nodes_Equality

# File activerecord/lib/arel/visitors/to_sql.rb, line 648
        def visit_Arel_Nodes_Equality(o, collector)
          right = o.right

          return collector << "1=0" if unboundable?(right)

          collector = visit o.left, collector

          if right.nil?
            collector << " IS NULL"
          else
            collector << " = "
            visit right, collector
          end
        end