SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function array (alias arr) (children 1)
     ExpressionList (children 3)
      Literal Array_[UInt64_1, UInt64_2]
      Function array (children 1)
       ExpressionList
      Literal Array_[UInt64_3]
   ExpressionList (children 2)
    Identifier arr.size0
    Identifier arr.size1
