SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayFlatten (children 1)
     ExpressionList (children 1)
      Function arrayJoin (children 1)
       ExpressionList (children 1)
        Function array (children 1)
         ExpressionList (children 2)
          Function array (children 1)
           ExpressionList (children 2)
            Function array (children 1)
             ExpressionList (children 1)
              Function array (children 1)
               ExpressionList
            Function array (children 1)
             ExpressionList (children 3)
              Literal Array_[UInt64_1]
              Function array (children 1)
               ExpressionList
              Literal Array_[UInt64_2, UInt64_3]
          Literal Array_[Array_[Array_[UInt64_4]]]