SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier k
    Function groupArrayForEach (children 1)
     ExpressionList (children 1)
      Identifier arr
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 2)
           Function intDiv (alias k) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_3
           Function arrayMap (alias arr) (children 1)
            ExpressionList (children 2)
             Function lambda (children 1)
              ExpressionList (children 2)
               Function tuple (children 1)
                ExpressionList (children 1)
                 Identifier x
               Function toString (children 1)
                ExpressionList (children 1)
                 Identifier x
             Function range (children 1)
              ExpressionList (children 1)
               Identifier number
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
          Literal UInt64_10
   ExpressionList (children 1)
    Identifier k
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier k