# File lib/sequel/adapters/shared/oracle.rb, line 109
109: defdistinct(*columns)
110: raise(Error, "DISTINCT ON not supported by Oracle") unlesscolumns.empty?
111: super
112: end
# File lib/sequel/adapters/shared/oracle.rb, line 115
115: defexcept(dataset, all = false)
116: raise(Sequel::Error, "EXCEPT ALL not supported") ifall
117: compound_clone(:minus, dataset, all)
118: end