Application Server 10gR3 on Suse Linux 10

I just download and installed Oracle Application 10g Release 3 on my linux box.

The version released this week is very light! No ldap, no database, well, a light one...


Application Server 10g Release 3 x86: 531 MB
Included:
* Oracle HTTP Server
* Oracle Application Server Containers for J2EE (OC4J)
* Oracle Enterprise Manager 10g Application Server Control
* Oracle Business Rules
* Oracle TopLink

Application Server 10g Release 2 x86: 2 GB
Included:
* Oracle HTTP Server Oracle Application Server Containers for J2EE (OC4J)
* Oracle Application Server Web Cache
* Oracle Application Server Portal
* Oracle Application Server Wireless
* Oracle Sensor Edge Server
* Oracle Enterprise Manager 10g Application Server Control
* Oracle Database Server 10g (10.1.0.4.2)
* Oracle Internet Directory
* Oracle Application Server Single Sign-On
* Oracle Application Server Directory Integration Provisioning
* Oracle Application Server Delegated Administration Services
* Oracle Application Server Certificate Authority
* Oracle Application Server Forms Services
* Oracle Application Server Reports Services
* Oracle Application Server Personalization
* Oracle Business Intelligence Discoverer
* Oracle Security Developer Tools
* Oracle Application Server Guard
* OracleAS Backup and Recovery Tool





I tried to install on my notebook, and, o surprise, it works...
the only thing that was missing and required was public domain korn shell, pdksh, which is easy to find by googling

Recursive PL/SQL

it will be a good week !

I found an elegant way to solve a query with recursive pl/sql.

an user wanted to have DHSGHDADSFDF translated in DHSGAF, that is, duplicated chars removed, order retained.

here is my function :

create or replace function f(v varchar2) return varchar2 is
begin
if (v is null) then return null;
else return substr(v,1,1)||f(replace(substr(v,2),substr(v,1,1));
end if;
end;
/


ref: using recursion with PL/SQL

raptor early adopter release 3.1 is out

raptor product page

I have not checked the differences with 3.0 yet, probably bug fixes with "do not save passwords"

raptor early adopter release 3 is out

This is THE release I have been waiting for, a raptor which does NOT save the password on your local PC. Save a password, even encrypted, on you local PC allows every one with physical access to your PC to get access to your productive database, which may be high-secured and with controlled physical access.

Download immediatly on otn !

static expression

Using Static Expressions with Conditional Compilation defines the kind of expression you can use with conditional compilation...

I got one question on forums.oracle.com today, an user wanted to use bitand and could not.

I wrote my answer but, ... , the site is down and eventually my answer did not get accepted.

So, to translate bitand(x,y)=z, using static expression, when x<8 and y<8 and z<8, then

(
(
(x=0) or
(y=0) or
(x=1 and (y=2 or y=4 or y=6)) or
(x=2 and (y=1 or y=3 or y=5 or y=7)) or
(x=3 and y=4) or
(x=4 and (y=1 or y=2 or y=3)) or
(x=5 and y=2) or
(x=6 and y=1)
) and z=0
) or (
(
(x=1 and (y=1 or y=3 or y=5 or y=7)) or
(x=3 and (y=1 or y=5)) or
(x=5 and (y=1 or y=3)) or
(x=7 and y=1)
) and z=1
) or (
(
(x=2 and (y=2 or y=3 or y=6 or y=7)) or
(x=3 and (y=2 or y=6)) or
(x=6 and (y=2 or y=3)) or
(x=7 and (y=2))
) and z=2
) or (
(
(x=3 and (y=3 or y=7)) or
(x=7 and y=3)
) and z=3
) or (
(
(x=4 and (y=4 or y=5 or y=6 or y=7)) or
(x=5 and (y=4 or y=6)) or
(x=6 and (y=4 or y=5)) or
(x=7 and y=4)
) and z=4
) or (
(
(x=5 and (y=5 or y=7)) or
(x=7 and y=5)
) and z=5
) or (
(
(x=6 and (y=6 or y=7)) or
(x=7 and y=6)
) and z=6
) or (
x=7 and y=7 and z=7
)


quite big, but this is evaluated only once, at compilation time, so it should be an acceptable workaround in some case !

difference between EXPLAIN PLAN and SET AUTOTRACE TRACEONLY EXPLAIN

most of the time I use set autot trace exp in order to get the execution plan. It seems more easy than explain plan for [query]; followed by select * from table (dbms_xplan.display);.

However, take care, set autotrace traceonly explain does modify the rows if you explain a plan for insert/update/delete.

SQL> set autot trace exp
SQL> delete emp;

14 rows deleted.


Execution Plan
----------------------------------------------------------
Plan hash value: 3538878155

---------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------
| 0 | DELETE STATEMENT | | 14 | 98 | 2 (0)| 00:00:01 |
| 1 | DELETE | EMP | | | | |
| 2 | TABLE ACCESS FULL| EMP | 14 | 98 | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------

SQL> set autot off
SQL> select count(*) from emp;
0
SQL> roll
Rollback complete.

but explain plan does not
SQL> select count(*) from emp;
14

SQL> explain plan for delete emp;

Explained.

SQL> select * from table (dbms_xplan.display);
Plan hash value: 3538878155

---------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------
| 0 | DELETE STATEMENT | | 14 | 98 | 2 (0)| 00:00:01 |
| 1 | DELETE | EMP | | | | |
| 2 | TABLE ACCESS FULL| EMP | 14 | 98 | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------

SQL> select count(*) from emp;
14


change MAXDATAFILES, MALOGFILES, MAXINSTANCES, MAXLOGMEMBERS without downtime

this is a 10gR2 new feature. It is no longer necessary to recreate the control file to increase those parameters. Actually, you do not have to change them, they change "automatically"

Demo

SQL> CREATE DATABASE
MAXDATAFILES 5
MAXINSTANCES 1
MAXLOGFILES 2
MAXLOGMEMBERS 1
extent management local
default tablespace users
default temporary tablespace temp
undo tablespace undotbs1;

Database created.

SQL> create tablespace t1;

Tablespace created.

SQL> create tablespace t2;

Tablespace created.

SQL> select count(*) from v$datafile;
COUNT(*)
----------
6

datafiles exceeded, but no error!


SQL> alter database add logfile ('/dbms/oracle/LSC75/redo/f1.sql','/dbms/oracle/LSC75/redo/f2.sql') size 16M;

Database altered.

SQL> select group#, members from v$log;
GROUP# MEMBERS
---------- ----------
1 1
2 1
3 2

logfiles and logmembers exceeded, but no error!



SQL> alter database add logfile instance 'I2';

Database altered.

SQL> alter database add logfile instance 'I2';

Database altered.

SQL> alter database enable instance 'I2';

Database altered.

SQL> select count(*) from v$INSTANCE_LOG_GROUP;
COUNT(*)
----------
2


instances exceeded, but no error!

so well, then why bother any more about specifying a big MAXDATAFILES and MAXLOGFILES at db creation?

security bug revealed

Pete Finnigan just mentioned a bug, which allow any user in any oracle version to get dba privilege Imperva discovers a critical access control bypass in login bug.

This is incredible!

Well, Pete urged you to apply CPU2006January asap.

select * from test where my_long like '%toto%'

A good way to learn is to try to answer user questions. Instead of referencing other posts, I tried today to answer that frequently asked question myself on developpez.com (french forum)


SQL> create table test ( my_long long);

Table created.

SQL> insert into test values ('hello toto !');

1 row created.

SQL> exec for r in ( select my_long from test ) loop if (r.my_long like '%toto%') then dbms_output.put_line(r.my_long); end if; end loop
hello toto !


new version of raptor

a few improvement described in the readme.txt. One of this is big-tnsfile support.

always missing is a way to NOT SAVE the password on the client!

oem grid control 10gR2 on Suse10

Last friday I installed RAC on my Suse10. Today, I installed Grid Control.

Of course it is not supported.

The packages I neeeded additionaly are db1 and openmotif.

It did not work 100%. I finally started the iasconsole (emctl start iasconsole), and within the iasconsole, I restarted the failed elements.

I created the repository manually (sysman/admin/emdrep/bin/RepManager)

clear screen reports cleared columns, breaks and computes


$ echo clear screen|sqlplus scott/tiger
SQL> columns cleared
breaks cleared
computes cleared


but if I quit properly, it does not report that

$ echo "clear screen
quit"|sqlplus scott/tiger
SQL>


a good reason to improve the quality of your shell script by quitting at the end ;-)

Suse10 10gR2 Laptop RAC

Hi,
I recommend the following reading Linux 10g Laptop RAC.

I have just installed RAC 10gR2 on Suse10.

The document above guided me thru the steps.

Specific Suse10 :
- raw devices are configured by editing /etc/raw with values like raw1:loop1 and must be activated with rcraw start (+ chkconfig -a raw for persitence)

To take care :
- read point 8 to survive reboot...

Specific 10gR2 :
In 10gR2, MAXINSTANCES must not be specified by create controlfiles. In 10gR2, the controlfile can grow dynamically. Even if I created my controlfile with maxinstances=1, I can do alter database add logfile instance 'RAC2' ; alter database add logfile instance 'RAC2' ; alter database enable instance 'RAC2';, which is simply great! CREATE CONTROLFILE just belongs to the past!

Installation:
I had to run vipca manually as root at the end of the root script of the crs installation. I also removed my existing oracle_homes and rebooted before installing database software again. The VIP interface must be configured in /etc/hosts and DOWN (ifconfig down eth0:2).

Conclusion:
The doc written by Amit Poddar on Howad site is usefull. Enjoy rac'ing on your pocket desk calculator!

Webcomment (test)

This is the homepage of dora