[ http://issues.apache.org/jira/browse/DERBY-1589?page=comments#action_12434722 ]
Bryan Pendleton commented on DERBY-1589:
----------------------------------------
Thanks Mamta! That is very helpful. My feeling is that the basic dependency
manager issue is generic, but the NPE symptom is specific to SQL Auth. I think
that without SQL Auth in place, the system is re-using the old prepared statement
without re-preparing it, but in this case there are no errors that result.
That is, SQL Auth converts this scenario from "harmless incorrect re-use of an invalid
prepared statement" to "NPE in permission descriptor handling due to incorrect
re-use of an invalid prepared statement".
I will work up a complete patch with regression tests, comments, etc.
Thanks again for the feedback and extra testing.
> CREATE TABLE throws NullPointerException in Derby SQL Standard Authorization after DROPs
and REVOKES
> ----------------------------------------------------------------------------------------------------
>
> Key: DERBY-1589
> URL: http://issues.apache.org/jira/browse/DERBY-1589
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.2.1.0
> Reporter: Daniel John Debrunner
> Assigned To: Bryan Pendleton
> Fix For: 10.2.1.0
>
>
> Currently, the last sql statement in following set of sql statements will raise a null
pointer exception
> connect 'jdbc:derby:c:/dellater/dbmaintest2;create=true' user 'mamta1' as mamta1;
> create table t11ConstraintTest (c111 int not null, c112 int not null, primary key (c111,
c112));
> grant references on t11ConstraintTest to mamta3;
> connect 'jdbc:derby:c:/dellater/dbmaintest2;create=true' user 'mamta3' as mamta3;
> drop table t31ConstraintTest;
> -- the following statement should remember that it depends on REFERENCES privilege on
mamta1.t11ConstraintTest
> create table t31ConstraintTest (c311 int, c312 int, foreign key(c311, c312) references
mamta1.t11ConstraintTest);
> drop table t31ConstraintTest;
> set connection mamta1;
> -- following should revoke all the privileges granted on it
> drop table t11ConstraintTest;
> create table t11ConstraintTest (c111 int not null, c112 int not null, primary key (c111,
c112));
> grant references(c111) on t11ConstraintTest to mamta3;
> grant references(c112) on t11ConstraintTest to PUBLIC;
> --connect 'jdbc:derby:c:/dellater/dbmaintest2;create=true' user 'mamta3' as mamta3;
> set connection mamta3;
> drop table t31ConstraintTest;
> -- following sql should recompie itself because the earlier plan depended on a privilege
which doesn't
> -- exist anymore. Instead, new privileges have been granted and the plan for following
statement should depend
> -- on those new privileges
> create table t31ConstraintTest (c311 int, c312 int, foreign key(c311, c312) references
mamta1.t11ConstraintTest);
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