SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayEnumerateUniqRanked (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 3)
        Literal Array_[\'a\']
        Function array (children 1)
         ExpressionList
        Literal Array_[\'a\']