# File lib/sequel/adapters/shared/oracle.rb, line 23
23: defdistinct(*columns)
24: raise(Error, "DISTINCT ON not supported by Oracle") unlesscolumns.empty?
25: super
26: end
# File lib/sequel/adapters/shared/oracle.rb, line 29
29: defexcept(dataset, all = false)
30: raise(Sequel::Error, "EXCEPT ALL not supported") ifall
31: compound_clone(:minus, dataset, all)
32: end