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 \'foo\'