Oracle Database 19c | Convert non CDB Database to PDB

We’ve our Oracle EBS instance hosted from Linux environment. However I post much for the Windows OS as I see there are not many articles targeting Oracle on Windows. I think for better view counts, I should consider posting the articles for both OS.

In my last post about restoring 1g RMAN online backup to 19c non CDB database, I said my ultimate goal was to convert the upgraded database from non CDB to PDB, that is plugged on to an existing CDB. Let us see how to achieve this goal this time.

Before start, there are few mandatory checks you must do to insure a successful migration from Non CDB to PDB. I will list few of them those came as hurdles for me.

  1. Character Set. Make sure that your CDB and the Non CDB database have the same character set. There are few possible conversions. Please check 12c Multitenant Container Databases (CDB) and Pluggable Databases (PDB) Character set restrictions / ORA-65116/65119: incompatible database/national character set ( Character set mismatch: PDB character set CDB character set ) (Doc ID 1968706.1) for more details. My CDB was using Arabic character set and the upgraded non CDB database was using a noncompatible set. So I dropped the CDB and created a new CDB without PDB(s). Dropping a CDB will not be always possible because other PDBs are attached to it.
  2. Available storage space. This could be a real concern incase if you are planning to create a PDB, cross verify & then delete the non CDB database. You will need approximately the same size of your non CDB datafiles size storage available to do this activity. My database was less than 5 GB in size, hence it never occurred to me. If your database has a bigger size, plan accordingly.

Let’s do it now.

From and elevated command prompt (Windows Terminal is not yet matured enough to handle such “heavy” tasks) source the non CDB. Shutdown and startup mount exclusive.

C:\Windows\system32>set ORACLE_SID=KAZEMA
C:\Windows\system32>sqlplus / as sysdba
SQL> shu immediate
SQL> startup mount exclusive
SQL> alter database open read only;

Create manifest file for the non CDB now.

SQL> exec dbms_pdb.describe (pdb_descr_file=>'D:\Oracle19c\kazema_manifest_file.xml');
SQL> shu immediate

Source the CDB now.

C:\Windows\system32>set ORACLE_SID=KAZEMACDB
C:\Windows\system32>sqlplus / as sysdba
SQL> SHOW CON_NAME

CON_NAME
------------------------------
CDB$ROOT

Now, we need to see whether non CDB meets the compatibility requirements. There could be multiple elements those you may have to fix before, the non CDB is ready for a successful migration as PDB. You will have to refer PDB_PLUG_IN_VIOLATIONS view for these details. Go ahead, execute the below code block.

SQL>   SET SERVEROUTPUT ON;
SQL>    DECLARE
       Compatible CONSTANT VARCHAR2(3) :=CASE  DBMS_PDB.CHECK_PLUG_COMPATIBILITY
       (pdb_descr_file => 'D:\Oracle19c\kazema_manifest_file.xml')
       WHEN TRUE THEN 'YES'
       ELSE 'NO'
       END;
       BEGIN
          DBMS_OUTPUT.PUT_LINE(compatible);
       END;
     /
YES

My case I didn’t have incompatibilities blocking possible migration. Your case could be different. If the output is “NO”, run the following query (use SQL Developer for better view)

select * from PDB_PLUG_IN_VIOLATIONS where name='<your non CDB name>';

Fix each and every other ERROR & you can safely ignore the “WARNINGS” for now.

Proceed with creating a new PDB from the manifest file that we have created in the 1st step.

SQL> CREATE PLUGGABLE DATABASE KAZEMA USING 'D:\Oracle19c\kazema_manifest_file.xml' COPY FILE_NAME_CONVERT=('D:\ORACLE19C\DB\ORADATA\KAZEMA\DATAFILE','D:\ORACLE19C\DB\ORADATA\KAZEMA');

Pluggable database created.

SQL> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 KAZEMA                         MOUNTED

Once the PDB has been created, confirm the same & proceed with balance activities. Run “noncdb_to_pdb.sql”

SQL> alter session set container=KAZEMA;

Session altered.

SQL> @$ORACLE_HOME/rdbms/admin/noncdb_to_pdb.sql

Based on the resource available, this might take a while for the script to complete execution. Once completed you can try to open the PDB. Check for Errors and Warnings in the PDB_PLUG_IN_VIOLATIONS view. If there are new ERRORS & WARNINGS fix them.

A typical scenario could list you many things like this (reference image only)

After fix attempts, I am still left with one Warning about sys lock issues. This is mainly due to the password file format 12.2. I hope to find a solution soon for it. Status column states whether the Error/Warning was taken care off.

SQL> alter pluggable database open;

Pluggable database altered.

SQL> SELECT name, open_mode FROM v$pdbs;

NAME
--------------------------------------------------------------------------------
OPEN_MODE
----------
KAZEMA
READ WRITE


1 row selected.

SQL> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         3 KAZEMA                         READ WRITE NO
SQL>

Now you have a non CDB and PDB with the same SID. You can proceed with dropping the non CDB database after cross verifying the concerns.

Reference documents:

Foot Note: If you are plugging a database that was hosted in another server/computer after converting, make sure to verify the “local_listener” parameter for the PDB exist.

D:\Oracle19c>sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sun Apr 10 11:18:33 2022
Version 19.14.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.14.0.0.0

SQL> show parameter local_listener

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
local_listener                       string      LISTENER_KAZEMACDB
SQL> alter session set container="KAZEMA";

Session altered.

SQL> show parameter local_listener

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
local_listener                       string      LISTENER_KAZEMACDB
SQL>

If the local listener is not reachable, PDB level services will fail to register with listener and the applications those depend on such services will fail to establish connections. This applies mostly to Oracle E-Business Suite environments and could be mapped to sophisticated applications that use specific service names to establish connections to the database.

Restore 11g RMAN online backup to 19c

Is it possible to restore previous version RMAN database backup to a later version? Depending upon the supported upgrade paths, the lowest version I managed to restore to 19c (19.14) was 11g R2 (11.2.0.4)

Upgrade Path for Oracle database 19c

Please note, my final goal is to convert this NON CDB database to PDB and attach to an existing CDB.

What you need?

  • Intact RMAN online backup
  • Enough memory and storage space available on your computer.
  • Time and patience
  • Oracle support access, for many of the documents mentioned later in the article.

Scenario (fictitious): I’m given a full RMAN backup without any other details. I don’t know the source server details other than that it was windows & the version of the database release was 11.2.0.4.

Step#1

Using DBCA created a new non CDB database with the target database name, eg “KAZEMA”. After shutting down database, stopped listener keeping Windows Service for Oracle database running. Physically deleted all data files including control, redo logs.

(You can create an empty instance using ORADIM. That means ORADIM will create Windows services necessary for Oracle. You will have to create the necessary folders. Not just that, you need create a parameter file (initDATABASENAME.ora) to start the instance. Refer the below example)

D:\Oracle19c>oradim -new -sid KAZEMA -syspwd Oracle123 -startmode auto
Enter password for Oracle service user:

OPW-00029: Password complexity failed for SYS user : Password must contain at least 1 special character.
Instance created.

Sample parameter file (initKAZEMA.ora)

kazema.__data_transfer_cache_size=0
kazema.__db_cache_size=1509949440
kazema.__inmemory_ext_roarea=0
kazema.__inmemory_ext_rwarea=0
kazema.__java_pool_size=0
kazema.__large_pool_size=33554432
kazema.__oracle_base='D:\Oracle19c\db'#ORACLE_BASE set from environment
kazema.__pga_aggregate_target=1073741824
kazema.__sga_target=2147483648
kazema.__shared_io_pool_size=117440512
kazema.__shared_pool_size=469762048
kazema.__streams_pool_size=0
kazema.__unified_pga_pool_size=0
*.audit_file_dest='D:\Oracle19c\db\admin\KAZEMA\adump'
*.audit_trail='db'
*.compatible='19.0.0'
*.control_files='D:\Oracle19c\db\oradata\KAZEMA\CONTROLFILE\control01.ctl','D:\Oracle19c\db\oradata\KAZEMA\CONTROLFILE\control02.ctl'
*.db_block_size=8192
*.db_name='KAZEMA'
*.diagnostic_dest='D:\Oracle19c\db'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=KAZEMAXDB)'
*.local_listener='LISTENER_KAZEMA'
*.nls_language='AMERICAN'
*.nls_territory='AMERICA'
*.open_cursors=300
*.pga_aggregate_target=1024m
*.processes=640
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=2048m
*.undo_tablespace='UNDOTBS1'
*.max_string_size='STANDARD'

Considering the fact that my target database name is “KAZEMA”, I have modified a copy of parameter file that I had. One of the most important factor you should pay attention here is to create all the physical paths mentioned in the parameter file. Example D:\Oracle19c\db\admin\KAZEMA\adump, D:\Oracle19c\db\oradata\KAZEMA\CONTROLFILE. Failing to find these physical paths might cause errors or your database will not start at all.

D:\Oracle19c\db\admin\KAZEMA has few more folders, like shown in the image. Please create them manually before starting the database.

Add *.max_string_size=’STANDARD’ to the parameter file, necessary for the upgrade. You will have to change this parameter once again after upgrade completes. We will discuss about it later in the article.

SQL> startup nomount (pfile=D:\Oracle19c\database\initKAZEMA.ora # if instance was created using ORADIM) 
ORACLE instance started.

Total System Global Area 2147482424 bytes
Fixed Size                  9030456 bytes
Variable Size             503316480 bytes
Database Buffers         1627389952 bytes
Redo Buffers                7745536 bytes

From another elevated command prompt started RMAN & restored control file from backup that I had in “D:\BAHRMAN” folder.

D:\BAHRMAN>set ORACLE_SID=KAZEMA

D:\BAHRMAN>rman target /

Recovery Manager: Release 19.0.0.0.0 - Production on Wed Mar 23 09:52:14 2022
Version 19.14.0.0.0

Copyright (c) 1982, 2021, Oracle and/or its affiliates.  All rights reserved.

connected to target database: KAZEMA (DBID=964058362, not open)

RMAN>restore controlfile from 'D:\BAHRMAN\CTL_C-964058362-20210927-02';
RMAN>alter database mount;
RMAN>report schema; #This will populate the data file details

Shutdown the database now. Restart the database in “nomount” mode using parameter file.

Once database shutdown and restarted, exit RMAN and connect again. We’ll duplicate database using the RMAN backup now using “NOOPEN” switch that is supported from versions 12.

D:\BAHRMAN>rman auxiliary /

Recovery Manager: Release 19.0.0.0.0 - Production on Wed Mar 23 09:56:42 2022
Version 19.14.0.0.0

Copyright (c) 1982, 2021, Oracle and/or its affiliates.  All rights reserved.

connected to auxiliary database: KAZEMA (not mounted)

run
{
ALLOCATE AUXILIARY CHANNEL c1 DEVICE TYPE disk;
ALLOCATE AUXILIARY CHANNEL c2 DEVICE TYPE disk;
ALLOCATE AUXILIARY CHANNEL c3 DEVICE TYPE disk;
ALLOCATE AUXILIARY CHANNEL c4 DEVICE TYPE disk;
duplicate database to "KAZEMA" NOOPEN backup location 'D:\BAHRMAN' nofilenamecheck
db_file_name_convert=('D:\ORACLE\ORADATA\KAZEMA\','D:\Oracle19c\db\oradata\KAZEMA\DATAFILE\')
LOGFILE
GROUP 1 (
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo01a.log',
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo01b.log'
) SIZE 1200M ,
GROUP 2 (
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo02a.log',
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo02b.log'
) SIZE 1200M ,
GROUP 3 (
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo03a.log',
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo03b.log'
) SIZE 1200M ,
GROUP 4 (
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo04a.log',
'D:\Oracle19c\db\oradata\KAZEMA\LOGFILE\redo04b.log'
) SIZE 1200M ;
# 19c & later, no need to exclusively release channels. If you restoring to other versions, make sure to release the channels.
# https://www.thegeekdiary.com/oracle-database-19c-rman-06012-channel-d1-not-allocated/
RELEASE CHANNEL c1;
RELEASE CHANNEL c2;
RELEASE CHANNEL c3;
RELEASE CHANNEL c4;
}

allocated channel: c1
channel c1: SID=498 device type=DISK

allocated channel: c2
channel c2: SID=619 device type=DISK

allocated channel: c3
channel c3: SID=742 device type=DISK

allocated channel: c4
channel c4: SID=862 device type=DISK

Starting Duplicate Db at 23-MAR-22
searching for database ID
found backup of database ID 964058362

contents of Memory Script:
.....Removed........
datafile 9 switched to datafile copy
input datafile copy RECID=8 STAMP=1100081253 file name=D:\ORACLE19C\DB\ORADATA\KAZEMA\DATAFILE\LC01.DBF
datafile 10 switched to datafile copy
input datafile copy RECID=9 STAMP=1100081253 file name=D:\ORACLE19C\DB\ORADATA\KAZEMA\DATAFILE\BAHAR01.DBF
Leaving database unopened, as requested
Finished Duplicate Db at 23-MAR-22
#You will see the below errors for 19c and later while trying to release the channels exclusively. Remove the release channel instructions from the RMAN scripts to avoid seeing these messages.

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of release command at 03/23/2022 10:07:32
RMAN-06012: channel: c1 not allocated

RMAN>

Ignore errors by the end of RMAN process, if they are related to releasing channels. If there are errors of other nature, you must resolve them. Now we will open the database resetting logs and ready to upgrade.

D:\Oracle19c>sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Mar 23 10:09:51 2022
Version 19.14.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.14.0.0.0

SQL> alter database open resetlogs upgrade;

Database altered.

As we have restored a RMAN backup, it is obvious that the source database had archive logs enabled. Let us disable archive logging from our new database. Shutdown the database and open it in mount mode.

SQL> startup mount pfile=D:\Oracle19c\database\initKAZEMA.ora
ORACLE instance started.

Total System Global Area 2147482424 bytes
Fixed Size                  9030456 bytes
Variable Size             503316480 bytes
Database Buffers         1627389952 bytes
Redo Buffers                7745536 bytes

SQL> alter database noarchivelog;
SQL> shutdown immediate;

SQL> startup upgrade pfile=D:\Oracle19c\database\initKAZEMA.ora

Now switch to %ORACLE_HOME%\perl\bin folder and call catctl.pl to upgrade the database.

D:\Oracle19c\perl\bin>perl D:\Oracle19c\rdbms\admin\catctl.pl -n 4 -l D:\Oracle19c\ D:\Oracle19c\rdbms\admin\catupgrd.sql

This is a long process for many reasons. First of all, no prerequisites were executed and recommended actions were performed against the source 11G database for 19c upgrade. This will cause upgrade process to fix prerequisites during upgrade & brace for few errors. Without MAX_STRING_SIZE set as ‘STANDARD’ for 11g, upgrade will fail. I have started the database instance using parameter file ONLY for this reason. I’m not sure whether RMAN restore crated SPFILE copies this value. So, I didn’t take chances.

Argument list for [D:\Oracle19c\rdbms\admin\catctl.pl]
For Oracle internal use only A = 0
Run in                       c = 0
Do not run in                C = 0
Input Directory              d = 0
Echo OFF                     e = 1
Simulate                     E = 0
Forced cleanup               F = 0
Log Id                       i = 0
Child Process                I = 0
Log Dir                      l = D:\Oracle19c\
Priority List Name           L = 0
Upgrade Mode active          M = 0
SQL Process Count            n = 4
SQL PDB Process Count        N = 0
Open Mode Normal             o = 0
Start Phase                  p = 0
End Phase                    P = 0
Reverse Order                r = 0
AutoUpgrade Resume           R = 0
Script                       s = 0
Serial Run                   S = 0
RO User Tablespaces          T = 0
Display Phases               y = 0
Debug catcon.pm              z = 0
Debug catctl.pl              Z = 0

catctl.pl VERSION: [19.0.0.0.0]
           STATUS: [Production]
            BUILD: [RDBMS_19.14.0.0.0DBRU_WINDOWS.X64_211224.3]


D:\Oracle19c\rdbms\admin\orahome.exe = [D:\Oracle19c]
D:\Oracle19c\bin\orabasehome.exe = [D:\Oracle19c]
catctlGetOraBaseLogDir = [D:\Oracle19c]

Analyzing file D:\Oracle19c\rdbms\admin\catupgrd.sql

Log file directory = [D:\Oracle19c]

catcon::set_log_file_base_path: ALL catcon-related output will be written to [D:\Oracle19c\catupgrd_catcon_8056.lst]

catcon::set_log_file_base_path: catcon: See [D:\Oracle19c\catupgrd*.log] files for output generated by scripts
catcon::set_log_file_base_path: catcon: See [D:\Oracle19c\catupgrd_*.lst] files for spool files, if any


Number of Cpus        = 8
Database Name         = KAZEMA
DataBase Version      = 11.2.0.4.0
Parallel SQL Process Count            = 4
Components in [KAZEMA]
    Installed [APEX APS CATALOG CATJAVA CATPROC CONTEXT EM JAVAVM ORDIM OWM SDO XDB XML XOQ]
Not Installed [DV MGW ODM OLS RAC WK]
DataBase Version      = 11.2.0.4.0

------------------------------------------------------
Phases [0-107]         Start Time:[2022_03_23 10:18:27]
------------------------------------------------------
***********   Executing Change Scripts   ***********
Serial   Phase #:0    [KAZEMA] Files:1    Time: 273s
***************   Catalog Core SQL   ***************
Serial   Phase #:1    [KAZEMA] Files:5    Time: 31s
Restart  Phase #:2    [KAZEMA] Files:1    Time: 1s
***********   Catalog Tables and Views   ***********
Parallel Phase #:3    [KAZEMA] Files:19   Time: 11s
Restart  Phase #:4    [KAZEMA] Files:1    Time: 0s
*************   Catalog Final Scripts   ************
Serial   Phase #:5    [KAZEMA] Files:7    Time: 14s
*****************   Catproc Start   ****************
Serial   Phase #:6    [KAZEMA] Files:1    Time: 11s
*****************   Catproc Types   ****************
Serial   Phase #:7    [KAZEMA] Files:2    Time: 6s
Restart  Phase #:8    [KAZEMA] Files:1    Time: 0s
****************   Catproc Tables   ****************
Parallel Phase #:9    [KAZEMA] Files:70   Time: 11s
Restart  Phase #:10   [KAZEMA] Files:1    Time: 1s
*************   Catproc Package Specs   ************
Serial   Phase #:11   [KAZEMA] Files:1    Time: 42s
Restart  Phase #:12   [KAZEMA] Files:1    Time: 0s
**************   Catproc Procedures   **************
Parallel Phase #:13   [KAZEMA] Files:95   Time: 4s
Restart  Phase #:14   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:15   [KAZEMA] Files:122  Time: 6s
Restart  Phase #:16   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:17   [KAZEMA] Files:25   Time: 2s
Restart  Phase #:18   [KAZEMA] Files:1    Time: 0s
*****************   Catproc Views   ****************
Parallel Phase #:19   [KAZEMA] Files:32   Time: 8s
Restart  Phase #:20   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:21   [KAZEMA] Files:3    Time: 8s
Restart  Phase #:22   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:23   [KAZEMA] Files:25   Time: 157s
Restart  Phase #:24   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:25   [KAZEMA] Files:12   Time: 96s
Restart  Phase #:26   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:27   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:28   [KAZEMA] Files:4    Time: 2s
Serial   Phase #:29   [KAZEMA] Files:1    Time: 0s
Restart  Phase #:30   [KAZEMA] Files:1    Time: 1s
***************   Catproc CDB Views   **************
Serial   Phase #:31   [KAZEMA] Files:1    Time: 0s
Restart  Phase #:32   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:34   [KAZEMA] Files:1    Time: 0s
*****************   Catproc PLBs   *****************
Serial   Phase #:35   [KAZEMA] Files:297  Time: 19s
Serial   Phase #:36   [KAZEMA] Files:1    Time: 0s
Restart  Phase #:37   [KAZEMA] Files:1    Time: 1s
Serial   Phase #:38   [KAZEMA] Files:10   Time: 3s
Restart  Phase #:39   [KAZEMA] Files:1    Time: 0s
***************   Catproc DataPump   ***************
Serial   Phase #:40   [KAZEMA] Files:3    Time: 40s
Restart  Phase #:41   [KAZEMA] Files:1    Time: 0s
******************   Catproc SQL   *****************
Parallel Phase #:42   [KAZEMA] Files:13   Time: 91s
Restart  Phase #:43   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:44   [KAZEMA] Files:11   Time: 7s
Restart  Phase #:45   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:46   [KAZEMA] Files:3    Time: 1s
Restart  Phase #:47   [KAZEMA] Files:1    Time: 0s
*************   Final Catproc scripts   ************
Serial   Phase #:48   [KAZEMA] Files:1    Time: 9s
Restart  Phase #:49   [KAZEMA] Files:1    Time: 0s
**************   Final RDBMS scripts   *************
Serial   Phase #:50   [KAZEMA] Files:1    Time: 15s
************   Upgrade Component Start   ***********
Serial   Phase #:51   [KAZEMA] Files:1    Time: 0s
Restart  Phase #:52   [KAZEMA] Files:1    Time: 1s
**********   Upgrading Java and non-Java   *********
Serial   Phase #:53   [KAZEMA] Files:2    Time: 363s
*****************   Upgrading XDB   ****************
Restart  Phase #:54   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:56   [KAZEMA] Files:3    Time: 22s
Serial   Phase #:57   [KAZEMA] Files:3    Time: 1s
Parallel Phase #:58   [KAZEMA] Files:10   Time: 2s
Parallel Phase #:59   [KAZEMA] Files:25   Time: 3s
Serial   Phase #:60   [KAZEMA] Files:4    Time: 4s
Serial   Phase #:61   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:62   [KAZEMA] Files:32   Time: 2s
Serial   Phase #:63   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:64   [KAZEMA] Files:6    Time: 5s
Serial   Phase #:65   [KAZEMA] Files:2    Time: 14s
Serial   Phase #:66   [KAZEMA] Files:3    Time: 59s
****************   Upgrading ORDIM   ***************
Restart  Phase #:67   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:69   [KAZEMA] Files:1    Time: 1s
Parallel Phase #:70   [KAZEMA] Files:2    Time: 25s
Restart  Phase #:71   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:72   [KAZEMA] Files:2    Time: 1s
Serial   Phase #:73   [KAZEMA] Files:2    Time: 1s
*****************   Upgrading SDO   ****************
Restart  Phase #:74   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:76   [KAZEMA] Files:1    Time: 29s
Serial   Phase #:77   [KAZEMA] Files:2    Time: 1s
Restart  Phase #:78   [KAZEMA] Files:1    Time: 1s
Serial   Phase #:79   [KAZEMA] Files:1    Time: 14s
Restart  Phase #:80   [KAZEMA] Files:1    Time: 0s
Parallel Phase #:81   [KAZEMA] Files:3    Time: 28s
Restart  Phase #:82   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:83   [KAZEMA] Files:1    Time: 4s
Restart  Phase #:84   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:85   [KAZEMA] Files:1    Time: 8s
Restart  Phase #:86   [KAZEMA] Files:1    Time: 1s
Parallel Phase #:87   [KAZEMA] Files:4    Time: 56s
Restart  Phase #:88   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:89   [KAZEMA] Files:1    Time: 1s
Restart  Phase #:90   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:91   [KAZEMA] Files:2    Time: 7s
Restart  Phase #:92   [KAZEMA] Files:1    Time: 0s
Serial   Phase #:93   [KAZEMA] Files:1    Time: 0s
Restart  Phase #:94   [KAZEMA] Files:1    Time: 1s
*******   Upgrading ODM, WK, EXF, RUL, XOQ   *******
Serial   Phase #:95   [KAZEMA] Files:1    Time: 18s
Restart  Phase #:96   [KAZEMA] Files:1    Time: 0s
***********   Final Component scripts    ***********
Serial   Phase #:97   [KAZEMA] Files:1    Time: 2s
*************   Final Upgrade scripts   ************
Serial   Phase #:98   [KAZEMA] Files:1    Time: 61s
*******************   Migration   ******************
Serial   Phase #:99   [KAZEMA] Files:1    Time: 30s
***   End PDB Application Upgrade Pre-Shutdown   ***
Serial   Phase #:100  [KAZEMA] Files:1    Time: 1s
Serial   Phase #:101  [KAZEMA] Files:1    Time: 0s
Serial   Phase #:102  [KAZEMA] Files:1    Time: 80s
*****************   Post Upgrade   *****************
Serial   Phase #:103  [KAZEMA] Files:1    Time: 49s
****************   Summary report   ****************
Serial   Phase #:104  [KAZEMA] Files:1    Time: 0s
***   End PDB Application Upgrade Post-Shutdown   **
Serial   Phase #:105  [KAZEMA] Files:1    Time: 1s
Serial   Phase #:106  [KAZEMA] Files:1    Time: 0s
Serial   Phase #:107  [KAZEMA] Files:1     Time: 41s

------------------------------------------------------
Phases [0-107]         End Time:[2022_03_23 10:48:42]
------------------------------------------------------
Grand Total Time: 1847s



*** WARNING: ERRORS FOUND DURING UPGRADE ***

 1. Evaluate the errors found in the upgrade logs
    and determine the proper action.
 2. Rerun the upgrade when the problem is resolved

REASON:
      ERRORS FOUND: During Upgrade
         FILENAME: D:\Oracle19c\catupgrd0.log AT LINE NUMBER: 1124126
------------------------------------------------------
Identifier CATPROC 22-03-23 10:31:12
SCRIPT    = [D:\Oracle19c\rdbms\admin\execsvrm.sql]
ERROR     = [ORA-13509: error encountered during updates to a AWR table ORA-12899: value too large for column ORA-12899: value too large for column "SYS"."OBJ$"."SUBNAME" (actual: 31, maximum: 30)
 (actual: , maximum: )
ORA-06512: at "SYS.DBMS_SWRF_INTERNAL", line 524
ORA-06512: at line 3
]
STATEMENT = [BEGIN
  /* Perform the required AWR catalog operations for this release */
  dbms_swrf_internal.refresh_catalog;
END;]
------------------------------------------------------
------------------------------------------------------
Identifier CATPROC 22-03-23 10:31:12
SCRIPT    = [D:\Oracle19c\rdbms\admin\execsvrm.sql]
ERROR     = [ORA-12899: value too large for column ORA-12899: value too large for column "SYS"."OBJ$"."SUBNAME" (actual: 31, maximum: 30)
 (actual: , maximum: )
ORA-06512: at "SYS.DBMS_SWRF_INTERNAL", line 524
ORA-06512: at line 3
]
STATEMENT = [as above]
------------------------------------------------------
------------------------------------------------------
Identifier CATPROC 22-03-23 10:31:12
SCRIPT    = [D:\Oracle19c\rdbms\admin\execsvrm.sql]
ERROR     = ["SYS"."OBJ$"."SUBNAME" (actual: 31, maximum: 30)  (actual: , maximum: )
ORA-06512: at "SYS.DBMS_SWRF_INTERNAL", line 524
ORA-06512: at line 3
]
STATEMENT = [as above]
------------------------------------------------------
------------------------------------------------------
Identifier CATPROC 22-03-23 10:31:12
SCRIPT    = [D:\Oracle19c\rdbms\admin\execsvrm.sql]
ERROR     = [(actual: , maximum: ) ORA-06512: at "SYS.DBMS_SWRF_INTERNAL", line 524
ORA-06512: at line 3
]
STATEMENT = [as above]
------------------------------------------------------
------------------------------------------------------
Identifier CATPROC 22-03-23 10:31:12
SCRIPT    = [D:\Oracle19c\rdbms\admin\execsvrm.sql]
ERROR     = [ORA-06512: at "SYS.DBMS_SWRF_INTERNAL", line 524 ORA-06512: at line 3
]
STATEMENT = [as above]
------------------------------------------------------
------------------------------------------------------
Identifier CATPROC 22-03-23 10:31:12
SCRIPT    = [D:\Oracle19c\rdbms\admin\execsvrm.sql]
ERROR     = [ORA-06512: at line 3]
STATEMENT = [as above]
------------------------------------------------------

 LOG FILES: (D:\Oracle19c\catupgrd*.log)

Upgrade Summary Report Located in:
D:\Oracle19c\upg_summary.log

Grand Total Upgrade Time:    [0d:0h:30m:47s]

I didn’t remove lines from the output to give you an overview of what happened during the initial “catupgrd.sql” call without MAX_STRING_SIZE set as “STANDARD“. As you can see, it has generated few errors & we need to fix them.

ERROR = [ORA-12899: value too large for column ORA-12899: value too large for column “SYS”.”OBJ$”.”SUBNAME” (actual: 31, maximum: 30) is pretty easy to fix. This is mainly due to strings lengths & follow the below steps to fix it.

Move to %ORACLE_HOME%\rdbms\admin folder.

SHUTDOWN IMMEDIATE;
STARTUP UPGRADE;
alter system set MAX_STRING_SIZE=EXTENDED;
@utl32k.sql
SHUTDOWN IMMEDIATE;
STARTUP; 

Once the script runs successfully, shutdown the database once again and start in upgrade mode. Rerun the “catupgrd.sql” as instructed above. Let the upgrade finish. Insure there are no errors. A successfully finished upgrade process will look like below. I mentioned earlier, this process could be pretty time taking based on the size of the database you are upgrading. My entire database was less than 5GB in size & I’ve NVMe+SSD based work laptop running i7 10th generation processor & 32GB memory. The waiting was frustrating.

Serial   Phase #:101  [KAZEMA] Files:1    Time: 0s
Serial   Phase #:102  [KAZEMA] Files:1    Time: 78s
*****************   Post Upgrade   *****************
Serial   Phase #:103  [KAZEMA] Files:1    Time: 23s
****************   Summary report   ****************
Serial   Phase #:104  [KAZEMA] Files:1    Time: 1s
***   End PDB Application Upgrade Post-Shutdown   **
Serial   Phase #:105  [KAZEMA] Files:1    Time: 1s
Serial   Phase #:106  [KAZEMA] Files:1    Time: 0s
Serial   Phase #:107  [KAZEMA] Files:1     Time: 36s

------------------------------------------------------
Phases [0-107]         End Time:[2022_03_23 15:15:34]
------------------------------------------------------

Grand Total Time: 1209s

 LOG FILES: (D:\Oracle19c\catupgrd0\catupgrd*.log)

Upgrade Summary Report Located in:
D:\Oracle19c\catupgrd0\upg_summary.log

Grand Total Upgrade Time:    [0d:0h:20m:9s]

I came across the errors while I called the upgrade and went ahead and fixed them. Kept the same in the article so that the search engine could pick up the errors for someone else out there. Now it is time for to recompile all invalid objects after upgrade.

SQL>@utlrp.sql

Unless you have a huge number of PL/SQL libraries and other, this should complete in few minutes. A count for invalid objects will be provided to you & you can proceed to fix them once after a database restart. Keep a tight watch on the alert log file and address additional errors, if any.

Finally create SPFILE from current parameter file, shutdown and restart the database. You should be good to go now. Check for the Temporary files, Redo Log files and other vitals.

These invalid objects are from custom schema & could be fixed/dropped if not needed. Make sure there are no system level invalid objects.

Another area of interest could be OLAP.

Check and confirm OLAP objects are not invalid. OLAP catalog was deprecated after 11g. You may proceed removing it if needed.

Reference articles

  • https://shivanandarao-oracle.com/2015/09/16/rman-restore-backup-of-lower-version-database-to-a-higher-version/
  • Upgrade using RMAN Duplicate with Noopen clause and Backup Location (Doc ID 2022820.1)
  • How to Convert Non-CDB to PDB Database on same local host machine in 12c – Testcase (Doc ID 2012448.1)
  • Utlu122s.sql Fails with ‘ORA-13509: error encountered during updates to a AWR table’ During Upgrade to 12c From 11g (Doc ID 2524115.1)
  • How to Increase the Maximum Size of VARCHAR2, NVARCHAR2, and RAW Columns in 12C Database using MAX_STRING_SIZE ? (Doc ID 1570297.1)
  • 12.2 : Database upgrade fails with error “SELECT TO_NUMBER(’32K_MIGRATION_NOT_COMPLETED’)” (Doc ID 2344458.1)

Footnote: For a PRODUCTION environment, please follow standard procedures like running upgrade check, prerequisites etc.

TNS-03505: Failed to resolve name

One of the major annoyances with Oracle EBS CDB/PDB environment settings I found that, I cannot connect to the PDB (for EBS) from the CDB environment (default). I always have to source the PDB environment in order to connect the PDB and do my stuffs.

As usual, I am doing this for my LAB & you may not copy this to your PRODUCTION environment.

So this what I get when I try to connect to PDB from CDB environment.

oracle@erp-devp.xyz.com:/u01/oratest/DEVP/db/tech_st/19.0.0/network/admin>tnsping DEVP

TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 22-MAR-2022 14:59:03

Copyright (c) 1997, 2021, Oracle.  All rights reserved.

Used parameter files:
/u01/oratest/DEVP/db/tech_st/19.0.0/network/admin/DEVP_erp-devp/sqlnet.ora

TNS-03505: Failed to resolve name

The easiest solution was to add an additional entry for the PDB within the $TNS_ADMIN tnsnames.ora file. Let us see how to. Please note these might get overwritten when you run autoconfig.

Save the file & you are ready to go. Notice carefully the service name and instance name values for “DEVP” and “DEVPCDB”. The PDB will have own name for the service, however the instance name will point towards the CDB name & this is the way it should be.

oracle@erp-devp.xyz.com:/home/oracle>tnsping DEVP

TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 22-MAR-2022 15:06:20

Copyright (c) 1997, 2021, Oracle.  All rights reserved.

Used parameter files:
/u01/oratest/DEVP/db/tech_st/19.0.0/network/admin/DEVP_erp-devp/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL=tcp)(HOST=erp-devp.xyz.com)(PORT=1526)) (CONNECT_DATA = (SERVICE_NAME=DEVP)(INSTANCE_NAME=DEVPCDB)))
OK (0 msec)
oracle@erp-devp.xyz.com:/home/oracle>

That’s all. Regardless whether it is EBS or not, you can keep adding the PDB details into the tnsnames.ora file & if the service is registered with the listener, will able to connect without sourcing the specific environment variables.

ORA-12560: TNS:protocol adapter error

Few “years” back, while it was almost impossible to install Oracle 10g on Windows 7/8, I made some attempts & managed to install 32Bit versions of 10g 10.2.0.3.x successfully. A particular release 10.2.0.4 had helluva of issues, mainly TNS related & I can see many visits to that thread even today! I believe, those visitors are not coming over there for 10g, instead for TNS.

On Windows, the below is a typical situation & we’ll see the primary reasons for the same.

Microsoft Windows [Version 10.0.22000.556]
(c) Microsoft Corporation. All rights reserved.

C:\Windows\system32>sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Mar 21 07:59:29 2022
Version 19.11.0.0.0

Copyright (c) 1982, 2020, Oracle.  All rights reserved.

ERROR:
ORA-12560: TNS:protocol adapter error


Enter user-name:

On Windows, everything is another service. So we’ll start with checking whether the “Oracle” service for the database instance has started.

I’m using Oracle database on my laptop mostly for learning purposes, hence the service startup is set as “Manual”. This gives me control over the resources consumed by the database. Not just the service, I have setup the instance to start manual to insure Oracle service doesn’t open the database automatically. Latest Windows OS that use quick boot will save the state of the service, hence you might find your database readily available once after a reboot, although you set everything as manual :)

Let’s see what happens after starting the “Oracle Service”.

Well, that fixes one of the many reasons for the dreaded ORA-12560: TNS:protocol adapter error! As soon I am hit with another, will amend this post.

Restore RMAN backup to same host with same database name | Windows

I think I have mentioned few times already that I am not a certified (Certifitted as we call it sarcastically due to the pure ignorance of much of them) DBA, yet I love executing experiments with Oracle database technology and come up with some hacks, tricks etc. As usual, whatever you read ahead is NOT recommended for PRODUCTION environment and if you end up setting up something that works finally for your PRODUCTION instance, well you are sole responsible for it.

For this experiment, we will use one 19c database with multitenant structure installed on Windows 10/11. Before you attempt the below, please make sure that you have taken the backup of control file trace, spfile copy as pfile and a full backup of database using RMAN

Control file backup trace.

SQL>alter database backup controlfile to trace as 'D:\folder_name\control.txt';

SPfile to Pfile (This file should be available at $ORACLE_HOME\database\ folder)

SQL>create pfile from spfile;

Creating pfile is not mandatory incase if you are restoring the backup to same host and the paths are intact. Pfile becomes useful when you are restoring the database to another host with same directory structure.

Shutdown the database & delete the datafile from paths. For example, my datafiles were in the following paths.

There were three paths from which I needed to delete the data files. From CDB root, PDB seed and PDB itself. You should get a clear idea of the exact locations for your data files from the control file trace export.

Once after deleting the files, start the database at nomount state. The latest version of databases allow you to execute many SQL commands from RMAN itself, however, I always prefer SQL prompt for SQL activities. Suite yourself.

SQL>startup nomount

From another command/terminal window connect to RMAN

D:\RMAN>rman target /

Recovery Manager: Release 19.0.0.0.0 - Production on Sat Mar 12 11:47:15 2022
Version 19.11.0.0.0

Copyright (c) 1982, 2021, Oracle and/or its affiliates.  All rights reserved.

connected to target database: SCTCDB (not mounted)

Restore the control file from latest backup

RMAN> restore controlfile from 'D:\RMAN\BKPCONTROL_FILE.CTL_SCTCDB_20220312';

Starting restore at 12-MAR-22
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=498 device type=DISK

channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=D:\ORACLE19C\DB\ORADATA\SCTCDB\CONTROL01.CTL
output file name=D:\ORACLE19C\DB\ORADATA\SCTCDB\CONTROL02.CTL
Finished restore at 12-MAR-22

Now try to mount the database.

RMAN> alter database mount;

released channel: ORA_DISK_1
Statement processed

Once the database mounted, let us see what the schema reprorts

RMAN> report schema;

Populate catalog from the backup.

RMAN> catalog start with 'D:\RMAN';

searching for all files that match the pattern D:\RMAN

List of Files Unknown to the Database
=====================================
File Name: D:\RMAN\BKPCONTROL_FILE.CTL_SCTCDB_20220312

Do you really want to catalog the above files (enter YES or NO)? YES
cataloging files...
cataloging done

List of Cataloged Files
=======================
File Name: D:\RMAN\BKPCONTROL_FILE.CTL_SCTCDB_20220312

Once the above completes successfully, we can proceed with restoring the backup.

RMAN> run
2> {allocate channel ch1 device type disk;
3> restore database;
4> switch datafile all;
5> switch tempfile all;
6> release channel ch1;
7> }

allocated channel: ch1
channel ch1: SID=252 device type=DISK

Starting restore at 12-MAR-22

channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00004 to D:\ORACLE19C\DB\ORADATA\SCTCDB\UNDOTBS01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_040O6TG6_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_040O6TG6_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:03
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00003 to D:\ORACLE19C\DB\ORADATA\SCTCDB\SYSAUX01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_020O6TG5_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_020O6TG5_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:15
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00005 to D:\ORACLE19C\DB\ORADATA\SCTCDB\PDBSEED\SYSTEM01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_050O6TG9_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_050O6TG9_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:15
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00009 to D:\ORACLE19C\DB\ORADATA\SCTCDB\SCT\SYSTEM01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_030O6TG5_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_030O6TG5_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:15
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00011 to D:\ORACLE19C\DB\ORADATA\SCTCDB\SCT\UNDOTBS01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_080O6TH9_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_080O6TH9_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:01
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00010 to D:\ORACLE19C\DB\ORADATA\SCTCDB\SCT\SYSAUX01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_060O6TH2_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_060O6TH2_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:07
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00007 to D:\ORACLE19C\DB\ORADATA\SCTCDB\USERS01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_0B0O6THG_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_0B0O6THG_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:01
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00008 to D:\ORACLE19C\DB\ORADATA\SCTCDB\PDBSEED\UNDOTBS01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_090O6THA_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_090O6THA_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:07
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00012 to D:\ORACLE19C\DB\ORADATA\SCTCDB\SCT\USERS01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_0C0O6THH_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_0C0O6THH_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:02
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00006 to D:\ORACLE19C\DB\ORADATA\SCTCDB\PDBSEED\SYSAUX01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_070O6TH9_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_070O6TH9_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:07
channel ch1: starting datafile backup set restore
channel ch1: specifying datafile(s) to restore from backup set
channel ch1: restoring datafile 00001 to D:\ORACLE19C\DB\ORADATA\SCTCDB\SYSTEM01.DBF
channel ch1: reading from backup piece D:\RMAN\SCT_SCTCDB_ LVL0_010O6TG5_1_1
channel ch1: piece handle=D:\RMAN\SCT_SCTCDB_ LVL0_010O6TG5_1_1 tag=DAILYFULL_DB_LVL0_BKP
channel ch1: restored backup piece 1
channel ch1: restore complete, elapsed time: 00:00:35
Finished restore at 12-MAR-22



released channel: ch1

With the above restore, I used only one channel, please adjust based on available hardware resources. Once the backup completes, we can recover the database using the available archive logs. For that you need to know what is the latest available sequence number.

RMAN> list backup of archivelog all;

From the image above, you could see that the latest Sequence number for the SCN is 20, however the listing is kind of confusing (remember I am not a DBA, however eventually I will figure out why the listing is messed up). Once the latest sequence number identified, we can try to recover until last sequence + 1

RMAN> run {
2> allocate channel ch1 device type disk;
3> allocate channel ch2 device type disk;
4> allocate channel ch3 device type disk;
5> allocate channel ch4 device type disk;
6> recover database until sequence 21;
7> release channel ch1;
8> release channel ch2;
9> release channel ch3;
10> release channel ch4;
11> }

allocated channel: ch1
channel ch1: SID=252 device type=DISK

allocated channel: ch2
channel ch2: SID=128 device type=DISK

allocated channel: ch3
channel ch3: SID=375 device type=DISK

allocated channel: ch4
channel ch4: SID=499 device type=DISK

Starting recover at 12-MAR-22

starting media recovery

archived log for thread 1 with sequence 19 is already on disk as file D:\ORA\ARCH\SCT0000000019_1096219042_0001.ARC
archived log for thread 1 with sequence 20 is already on disk as file D:\ORA\ARCH\SCT0000000020_1096219042_0001.ARC
archived log file name=D:\ORA\ARCH\SCT0000000019_1096219042_0001.ARC thread=1 sequence=19
archived log file name=D:\ORA\ARCH\SCT0000000020_1096219042_0001.ARC thread=1 sequence=20
media recovery complete, elapsed time: 00:00:01
Finished recover at 12-MAR-22

released channel: ch1

released channel: ch2

released channel: ch3

released channel: ch4

Finally, we can open the database resetting online redo log files

RMAN> alter database open resetlogs;

Database MUST open without creating any issues at this stage. Continue checking for the database vitals.

Linux | Folder permissions for group

Let us see how we can create and give a group write permission for a folder on Linux environment. This becomes helpful when you want to keep downloaded files accessible to multiple users. Very helpful if you are dealing with Oracle EBS like applications that has different users for both database and application.

[root@erp-test /]# mkdir -p orapatches


--Change group ownership for the newly created folder.
[root@erp-test /]# chgrp -R oinstall /orapatches


--Finally change the mode so that all the members in this group could write to this folder.

[root@erp-test /]# chmod g+w /orapatches

Hope this helps few newbies out there!