db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yip Ng (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1716) Revoking select privilege from a user times out when that user still have a cursor open.
Date Thu, 21 Sep 2006 01:30:22 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1716?page=comments#action_12436416 ] 
            
Yip Ng commented on DERBY-1716:
-------------------------------

I debugged into the code abit today, I don't think the system is fetching the  permission
descriptor(s) 
from the system catalog at compilation time for the stated problem of this jira.  During bind
phase,
the system just collects various permission(s) that are required to execute the select statement.
 It is 
at the execution time of the statement that the descriptors are fetched from the data dictionary.


> Revoking select privilege from a user times out when that user still have a cursor open.
> ----------------------------------------------------------------------------------------
>
>                 Key: DERBY-1716
>                 URL: http://issues.apache.org/jira/browse/DERBY-1716
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.1.0
>         Environment: Sun JDK 1.4.2
>            Reporter: Yip Ng
>
> Revoking table select privilege from a user  will time out if that user still have an
open cursor on that table.
> Hence, a database owner will not be able to revoke select privilege from any user(s)
if they still have a cursor 
> open.  i.e.:  
> ij version 10.2
> ij> connect 'jdbc:derby:cs1;create=true' user 'user1' as user1;
> WARNING 01J14: SQL authorization is being used without first enabling authentication.
> ij> connect 'jdbc:derby:cs1' user 'user3' as user3;
> WARNING 01J14: SQL authorization is being used without first enabling authentication.
> ij(USER3)> set connection user1;
> ij(USER1)> create table t1001 (c varchar(1));
> 0 rows inserted/updated/deleted
> ij(USER1)> insert into t1001 values 'a', 'b', 'c';
> 3 rows inserted/updated/deleted
> ij(USER1)> grant select on t1001 to user3;
> 0 rows inserted/updated/deleted
> ij(USER1)> set connection user3;
> ij(USER3)> autocommit off;
> ij(USER3)> GET CURSOR crs1 AS 'select * from user1.t1001';
> ij(USER3)> next crs1;
> C   
> ----
> a   
> ij(USER3)> set connection user1;
> ij(USER1)> -- revoke select privilege while user3 still have an open cursor
> revoke select on t1001 from user3;
> ERROR 40XL1: A lock could not be obtained within the time requested
> ij(USER1)> select * from syscs_diag.lock_table;
> XID            |TYPE |MODE|TABLENAME                                                
                                                                      |LOCKNAME          
 |STATE|TABLETYPE|LOCK&|INDEXNAME                                                    
                                                                  
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> 130            |TABLE|IS  |SYSTABLEPERMS                                            
                                                                      |Tablelock         
 |GRANT|S        |4    |NULL                                                             
                                                              
> 130            |ROW  |S   |SYSTABLEPERMS                                            
                                                                      |(1,7)             
 |GRANT|S        |2    |NULL                                                             
                                                              
> 130            |TABLE|IS  |T1001                                                    
                                                                      |Tablelock         
 |GRANT|T        |1    |NULL                                                             
                                                              
> 3 rows selected
> ij(USER1)> set connection user3;
> ij(USER3)> next crs1;
> C   
> ----
> b   
> ij(USER3)> next crs1;
> C   
> ----
> c   
> ij(USER3)> close crs1;
> ij(USER3)> 
> Is there a reason why Derby still keep shared locks on SYS.SYSTABLEPERMS during fetch?
> sysinfo:
> ------------------ Java Information ------------------
> Java Version:    1.4.2_12
> Java Vendor:     Sun Microsystems Inc.
> Java home:       C:\Program Files\Java\j2re1.4.2_12
> Java classpath:  derby.jar;derbytools.jar
> OS name:         Windows XP
> OS architecture: x86
> OS version:      5.1
> Java user name:  Yip
> Java user home:  C:\Documents and Settings\Yip
> Java user dir:   C:\work3\derby\tests\derby-10.2.1.0\lib
> java.specification.name: Java Platform API Specification
> java.specification.version: 1.4
> --------- Derby Information --------
> JRE - JDBC: J2SE 1.4.2 - JDBC 3.0
> [C:\work3\derby\tests\derby-10.2.1.0\lib\derby.jar] 10.2.1.0 beta - (430903)
> [C:\work3\derby\tests\derby-10.2.1.0\lib\derbytools.jar] 10.2.1.0 beta - (430903)
> ------------------------------------------------------
> ----------------- Locale Information -----------------
> Current Locale :  [English/United States [en_US]]
> Found support for locale: [de_DE]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [es]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [fr]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [it]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [ja_JP]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [ko_KR]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [pt_BR]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [zh_CN]
>          version: 10.2.1.0 - (430903)
> Found support for locale: [zh_TW]
>          version: 10.2.1.0 - (430903)
> ------------------------------------------------------

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message