SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function emptyArrayToSingle (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 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 tuple (children 1)
                ExpressionList (children 3)
                 Identifier x
                 Function toString (children 1)
                  ExpressionList (children 1)
                   Identifier x
                 Function if (children 1)
                  ExpressionList (children 3)
                   Function equals (children 1)
                    ExpressionList (children 2)
                     Identifier x
                     Literal UInt64_1
                   Literal NULL
                   Identifier x
             Function range (children 1)
              ExpressionList (children 1)
               Function modulo (children 1)
                ExpressionList (children 2)
                 Identifier number
                 Literal UInt64_3
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
          Literal UInt64_10
