SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function tuple (alias x) (children 1)
     ExpressionList (children 3)
      Identifier number
      Function toString (children 1)
       ExpressionList (children 1)
        Identifier number
      Function range (children 1)
       ExpressionList (children 1)
        Identifier number
    Function CAST (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal \'String\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_10
