SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function hex (children 1)
     ExpressionList (children 1)
      Function toString (children 1)
       ExpressionList (children 1)
        Function initializeAggregation (children 1)
         ExpressionList (children 2)
          Literal \'anyLastState\'
          Function initializeAggregation (children 1)
           ExpressionList (children 2)
            Literal \'uniqState\'
            Literal UInt64_0
