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