SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function length (children 1)
     ExpressionList (children 1)
      Function repeat (children 1)
       ExpressionList (children 2)
        Literal \'x\'
        Literal UInt64_1000000
