Clarification regarding the revoke privilege

Question

The customer revoked "select any table" privilege from a user.
(If SELECT ANY TABLE is revoked from a user, then all procedures contained in that users schema relying on this privilege will fail until the privilege is reauthorized)
In the below user's procedure,there isn't any select statement.But,the procedure still becomes invalid after revoke.why ?
And after the customer had run the procedure again,it becomes valid again .(The customer hasn't recompiled the procedure explicitly).
SQL>create or replace procedure calling
is
i number;
begin
--pining;
dbms_lock.sleep(60);
end;
/

Answer 1

To answer the question as to why the procedure worked when invoked: Oracle automatically attempts to recompile any invalid stored procedure, function, or package when an attempt to execute the objects occurs. If all necessary privileges are in place the recompile works and the execution proceeds. If the recompile is not successful then an error is returned to the caller.
As to why the procedure went invalid when the "select any" privilege was revoked I am not sure though I suspect it has to do with the way the privilege is tracked and maintained internally.
The full Oracle version should have been included in your post. You never know when it is important to some specifics of the question. Such as with 11g Oracle has improved dependency tracking so that many table alterations should no longer result in stored code going invalid in cases where the change does not affect the actual code logic.
HTH -- Mark D Powell --