SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 2)
    Function length (alias n) (children 1)
     ExpressionList (children 1)
      Identifier arr
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier v
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_func_to_subcolumns_use_nulls
   ExpressionList (children 1)
    Identifier n
   Function or (children 1)
    ExpressionList (children 2)
     Function lessOrEquals (children 1)
      ExpressionList (children 2)
       Identifier n
       Literal UInt64_4
     Function isNull (children 1)
      ExpressionList (children 1)
       Identifier n
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier n
   Set
