48     val correctAnswer = input.select('b).generate(Explode('b), join = false).analyze  constant
64     val correctAnswer =  constant
85     val correctAnswer =  constant
100     val correctAnswer = input.select('a, 'b).orderBy('b.asc).select('a).analyze  constant
190     val correctAnswer =  constant
207     val correctAnswer =  constant
225     val correctAnswer =  constant
245     val correctAnswer =  constant
273     val correctAnswer = input.select('a, 'c, 'd).groupBy('a, 'c, 'd)('a, 'c).analyze  constant
286     val correctAnswer =  constant
301     val correctAnswer = input.select('a, 'c).analyze  constant