SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function initializeAggregation (children 1)
       ExpressionList (children 2)
        Literal \'uniqExactState\'
        Function toNullable (children 1)
         ExpressionList (children 1)
          Literal UInt64_123
