SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function sum (children 1)
     ExpressionList (children 1)
      Function length (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 1)
           Function range (alias arr) (children 1)
            ExpressionList (children 1)
             Function modulo (children 1)
              ExpressionList (children 2)
               Identifier number
               Literal UInt64_10
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 3)
                 ExpressionList (children 1)
                  Asterisk
                 TablesInSelectQuery (children 1)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    TableIdentifier system.numbers
                 Literal UInt64_1000
          Function equals (children 1)
           ExpressionList (children 2)
            Function modulo (children 1)
             ExpressionList (children 2)
              Function length (children 1)
               ExpressionList (children 1)
                Identifier arr
              Literal UInt64_2
            Literal UInt64_0
