Category Archives: Oracle

Setting up Oracle Database for development

To set up an Oracle Database for development I install the database in a docker container and then modify password policies in the default user profile as follows:

ALTER PROFILE DEFAULT LIMIT COMPOSITE_LIMIT UNLIMITED
  PASSWORD_LIFE_TIME UNLIMITED
  PASSWORD_REUSE_TIME UNLIMITED
  PASSWORD_REUSE_MAX UNLIMITED
  PASSWORD_VERIFY_FUNCTION NULL
  PASSWORD_LOCK_TIME UNLIMITED
  PASSWORD_GRACE_TIME UNLIMITED
  FAILED_LOGIN_ATTEMPTS UNLIMITED;

this prevents passwords from expiring and users from being locked.

(more…)

Oracle Database 19c auditing with Multitenant Architecture

First I installed Oracle 19c in Docker container , enabled unified auditing, and created multiple pluggable databases:

export ORACLE_SID=ORCLCDB
cd $ORACLE_HOME/bin
#connect to root container
./sqlplus / as sysdba
CREATE PLUGGABLE DATABASE testpdb1 ADMIN USER admin1 IDENTIFIED BY dbpasswd1
    FILE_NAME_CONVERT=('/opt/oracle/oradata/ORCLCDB/pdbseed', '/opt/oracle/oradata/ORCLCDB/testpdb1');
Pluggable database created.
CREATE PLUGGABLE DATABASE testpdb2 ADMIN USER admin2 IDENTIFIED BY dbpasswd2
    FILE_NAME_CONVERT=('/opt/oracle/oradata/ORCLCDB/pdbseed', '/opt/oracle/oradata/ORCLCDB/testpdb2');
Pluggable database created.
(more…)

Installing Oracle Database 19.3 in a Docker container on Ubuntu Server 18.04

First I installed Ubuntu Server 18.04 as a Hyper-V machine on Windows 10.

While creating the virtual machine I selected Generation 1, because Generation 2 resulted in some strange effects.

Then I created a separate user with sudo permission:

sudo useradd -d /home/singh -m --shell "/bin/bash" singh
sudo passwd singh
sudo usermod -aG sudo singh
(more…)

Inegrating Oracle Database 18 with MS Active Directory

I configured DNS on my Windows Server 2016 (takes some time, probably 15 minutes):

ipconfig /registerdns
(more…)

Oracle Database user and role IDs

Below I provided the results of two following queries:

SELECT USERNAME, USER_ID FROM DBA_USERS ORDER BY USER_ID DESC;
SELECT ROLE, ROLE_ID FROM DBA_ROLES ORDER BY ROLE_ID DESC;

that display Oracle Database 18 users, roles and their IDs:

(more…)

Accessing Oracle Database in C++ with MS VS2017.

Download binaries (redistributables) and C++ SDK from Oracle website. For 64bit platform they are respectively:

instantclient-basic-windows.x64-18.5.0.0.0dbru.zip
instantclient-sdk-windows.x64-18.5.0.0.0dbru.zip

Extract them, create a C++ project in VS2017 and link oraocci18.lib in Release configuration and oraocci18d.lib in Debug configuration.

(more…)

How to get all the privileges of an Oracle database user.

While investigating of how to get all the privileges of an Oracle database user I played with the following queries:

select COUNT(*) from DICTIONARY;
select USERNAME from SYS.ALL_USERS;

select * from DBA_USERS;
select * from DBA_ROLES;
select * from DBA_SYS_PRIVS where grantee = 'CONNECT';
select * from DBA_SYS_PRIVS where grantee = 'RESOURCE';
select * from DBA_SYS_PRIVS;
select * from SESSION_PRIVS;
select * from DBA_TAB_PRIVS where GRANTEE <> 'PUBLIC';
select count(*) from DBA_TAB_PRIVS;
select * from DBA_COL_PRIVS;
select * from ROLE_TAB_PRIVS;
(more…)

Installing sample Oracle Database schemas.

I installed sample Oracle database schemas with the following steps:

Cloned the repository, changed the directories in the installation script, and started my docker container with the mapped folder:

sudo su - oracle
mkdir repos
cd repos
git clone https://github.com/oracle/db-sample-schemas.git
cd db-sample-schemas
perl -p -i.bak -e 's#__SUB__CWD__#'$(pwd)'#g' *.sql */*.sql */*.dat
exit
sudo docker run -d -it --rm --name oracle18se -v /home/oracle/oradata18:/opt/oracle/oradata -v /home/oracle/repos:/home/oracle/repos -p 1521:1521 -p 5500:5500 oracle/database-se:18.3.0
sudo docker logs oracle18se
(more…)

Oracle 19c Audit changes.

In Oracle 19c the following fields of AUDIT_UNIFIED_ENABLED_POLICIES table were renamed:

  • ENABLED_OPT renamed with ENABLED_OPTION
  • USER_NAME renamed with ENTITY_NAME

So the audit options query in Oracle 19c looks like this:

SELECT up.AUDIT_OPTION, uep.SUCCESS, uep.FAILURE from AUDIT_UNIFIED_ENABLED_POLICIES uep, AUDIT_UNIFIED_POLICIES up 
WHERE uep.ENTITY_NAME = 'ALL USERS' and uep.ENABLED_OPTION='BY USER' and uep.POLICY_NAME = up.POLICY_NAME and up.AUDIT_OPTION_TYPE = 'STANDARD ACTION';
(more…)

Configuring Oracle Database for Auditing.

To enable Unified Auditing in Oracle Database 12 and 18 on Oracle Linux I did this:

export ORACLE_SID=ORCLCDB
cd $ORACLE_HOME/bin
./sqlplus sys as sysdba
SHUTDOWN IMMEDIATE
EXIT
./lsnrctl stop
cd $ORACLE_HOME/rdbms/lib
make -f ins_rdbms.mk uniaud_on ioracle
cd $ORACLE_HOME/bin
./lsnrctl start
./sqlplus sys as sysdba
STARTUP
(more…)