SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function transform (children 1)
     ExpressionList (children 4)
      Literal Int64_-1
      Literal Array_[Int64_-1, UInt64_2]
      Literal Array_[\'f\', \'s\']
      Literal \'g\'
