Queries regarding DB2 to Oracle migration

Hi,
I am new to working on Oracle Migration Workbench and DB2. We are evaluating Oracle Migration Workbench (OMWB )for migrating our client's database which is on DB2 Version 5 Release 2 to Oracle. Request clarifications on below listed questions:
1/ Is OMWB capable of migrating database which is on DB2 Version 5 Release 2 to Oracle?
2/ When I connected to the AS/400 system using Capture Wizard, the system just stays on the Source Database Window with the message "Capturing Source Database..." for an unusually long time. Is there anyway to figureout if the process is going on fine or if there is an issue?
Thank you.
Regards,
Balu

To answer you first question, we don't support that version. You will need to seek an alternative tool, like for example SQL Ways from Ispirer
http://www.ispirer.com/products/
Donal

Similar Messages

Few queries regarding content/web content migration

Hi All,
i have few queries regarding migration of web site and contents (from development to test )which are not clarified after reading oracle docs.
--> When we do site replication will the content be migrated (data files).
--> when we migrate content will all ED and RD etc.(all web site object type be migrated).
--> are both the step necessary for migration when we have to migrate web site.
thanks
-somesh

--> When we do site replication will the content be migrated (data files).It depends how you do it. The "Site Studio Replicator" tool will not move any content, only the site structure. The "Manage Site Replication" page can be used to migrate content with the site structure but I don't recommend it for large sites, I use separate Archiver tasks for moving content. The "Backup and Restore" page stores the entire site in a ZIP file, not advisable for large sites.
--> when we migrate content will all ED and RD etc.(all web site object type be migrated).Yes. It uses the xWebsites metadata field to identify items that belong to the site.
--> are both the step necessary for migration when we have to migrate web site.Depends how you do it, but yes, all bits are required.

Define BINARY DATA column (DB2 to Oracle migration)

Have a table where a column is defined as 'FOR BIT DATA'. This specifies that the contents of the column are to be treated as bit (binary) data. During data exchange with other systems, code page conversions are not performed. Comparisons are done in binary, irrespective of the database collating sequence.
During conversion to Oracle using Oracle Migration Workbench, this table is converted irrespective of this definition. Please see below for details:
DB2 table definition:
CREATE TABLE ADMIN.XENCY (
          ID INTEGER NOT NULL ,
          XENCYSYMBOL CHAR(2) FOR BIT DATA NOT NULL ,
          IN TS_XENCY ;
Oracle table definition as generated by OMWB:
CREATE TABLE ADMIN.XENCY
( ID NUMBER(10,0) NOT NULL ENABLE,
XENCYSYMBOL CHAR(2) NOT NULL ENABLE,
) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE TS_XENCY;
During data loading from DB2 to Oracle it fails for this table with the following error:
Type: Error
Time: 14-08-2006 18:21:02
Phase: Migrating
Message: Unable to migrate data from source table ADMIN.XENCY to destination table ADMIN.XENCY : ADMIN.XENCY; ORA-12899: value too large for column "ADMIN"."XENCY"."XENCYSYMBOL" (actual: 4, maximum: 2)
For Oracle the length of the data in this column is 4; however for DB2 it is 2 only as shown below:
$ db2 "select max(length(Xencysymbol)) from admin.Xency with ur"
1
2
1 record(s) selected.
$
The distinct contents of this table is as follows:
$ db2 "select distinct Xencysymbol from admin.Xency with ur"
XENCYSYMBOL
x'0024'
x'2020'
2 record(s) selected.
$
How do I define a column as containing binary data in Oracle?
Thanks in advance.

The MWB DB2 LUW plug-in incorrectly translates CHAR FOR BIT. Doesn't particularly pay attention to any of the CHAR modifiers. It will just see that column as a CHAR. Obviously, this is a defect.
Binary data of limited length is stored in RAW type columns in Oracle DB.
You have two problems (in addition to issuing an ALTER COLUMN to fix the type delcaration or dropping, tweaking the table creation script and reloading. )
1. The data extraction scripts utilized for that table have not properly encoded the data for transport between DB systems. If there are endian differences between he source and target platform there may be additional problems. Nominally, you can export the binary data in hex format.
2. The SQL*Loader file needs to be adjusted. (if you dump in hex format, so the data in the file is characters of a hex value )
XENCYSYMBOL CHAR : hextoraw( : XENCYSYMBOL)
Loader will convert those hex characters back into RAW as it loads.
[ The built in data pump will not work obviously because the system thinks it is a CHAR. So offline data transfer is your only option. ]

Migration data from SAP DB2 to Oracle 10g

Hi , I am assigned to migrate data from SAP system which is using DB2 to Oracle 10g.I not very familiar with SAP. I hope someone can help me., especially for those familiar in SAP.
Please help me.
thanks
jebatco

Hello,
just migrating a DB2 database to Oracle 10g might be an easy task. The Oracle Migration Workbench is the tool for such a migration:
http://www.oracle.com/technology/tech/migration/workbench/index.html
I have no idea about SAP, and that might complicate the picture. But there exist specialists for this task:
Oracle Expertise in the SAP environment
The Solution Center SAP Support and Service – located in Walldorf – offers SAP
customers the following services:
• Advanced Customer Services (ACS)
• Performance Analysis and Tuning
• Development of concepts for Backup/Restore/Recovery, and High Availability,
Administration
• Security concepts
• Optimizing of ABAP/4 programs (performance improvement)
• Migration service for customers, who want to use Oracle as the database for SAP
applications (from Informix, MaxDB, DB2, or SQL Server to Oracle).
• Migration services from “Oracle to Oracle” (e.g. Tru64 to HP_UX)
• Integration-Products and –Services
• Oracle Database: The Database of Choice for Deploying SAP Solutions
This is taken from http://www.oracle.com/newsletters/sap/docs/ora4sap-db-of-choice.090213.pdf
Best regards
Wolfgang

Migration from DB2 to Oracle 10g using free tools

Dear all,
Im currently using DB2 database and wish to migrate data over to Oracle 10g express. However, i could not find any free tools or methods to migrate without using tools as i could not use tools like Oracle Migration Workbench as the migration is for certain project which will deal with internal process or commercial purpose.
Would like to seek everybody's help. Greatly appreciation your response.
Regards,
Kee Cheng =)

nvr4getu wrote:
Thanks. But have you heard of creating a heterogenous services, create a database link between the 2 database, then transform over to Oracle?I thought you were looking for a free tool. With HS, you'll have to buy the component to install on the DB2 system. Unless something has changed since the last time I worked in a mixed Oracle/DB2 shop.

Access 2003 to Oracle Migration Queries

Hi Experts,
I have taken up a project to migrate Access 2003 application to Oracle 9i.The Forms and Reports will continue to run in Access 2003 with Oracle 9i database. I decide to use Oracle Migration workbench for the migration purpose.What I think is the back-end i.e. database and queries will be automatically migrated to Oracle 9i but I'm not sure about the front end application.
Do I need to change front end application to point to database in Oracle 9i or OMW will do that itself.I am also confused with lots of queries that reside in current Access database. I presume these queries will be converted to Oracle procedures/views without any manual intervention but will the front-end application also be modified automatically to point to those stored procedures/views. Otherwise an extensive code change will be required which may result in huge cost.
Currently the Access application is not using any ODBC DSN as it gets connected to the database automatically. Should the database connection be changed to use DSN prior to Migration?
One more thing, the application is using single-level linked table. Will the linked table get automatically converted and connected or I need to do anything?
Could anyone help me in this issue by giving some ideas so I can manage the job efficiently and make proper planning before plunging into the real work.
Thanks & Regards
S C

The Migration Workbench will modify the Access mdb file as part of the migration if you request it, to create the necessary link tables to oracle, it will use an ODBC DSN to do this. This is explained in our documentation. This should be transparent.
However for complex application, you often have a tuning exercise, to ensure that the jet engine does the "right" thing, and there changes are required, e.g. a two way join, you would want that to happen on the server and not done on the client. This would be same tuning exercise, if the back end was SQL Server.
In the latest release of the Access plugin, we did a better job migrating queries to views, but you need to plug this into your code.
Yes, the exporter should extract the information about the linked table, assuming the link is valid at the time of extraction.
Donal

Siebel Database migration from IBM DB2 to Oracle

Hi ,
We are planning to migrate Siebel / OBIEE db form the existing DB2 to Oracle db. Can some please help us, what are the points we need to consider.
Also please let us know if you find any hurdles during the same.
Regards
Muni

Hello Kumar
Typically for Packaged Apps you don't have to migrate database objects like stored procedures, triggers, views etc as the app will have its own database specific seed schema. What needs to be migrated/ported is the customizations done to the app in the source environment and the transaction data to the target and ofcourse a thorough testing is recommended.
So the migration process typically is :
1. Install Siebel for Oracle (schema and data access layer).
2. Implement customizations in Oracle.
3. Migrate transaction data from source DB to Oracle.
4. Test.
Oracle has a group that can help with this process. Let me know and I will put you in touch with them.
Regards
Prakash

Tools for migrating data from SAP DB2 to Oracle

HI, someone please help regarding the topic mentioned above. Is there any tools that I can use to migrate the DB2 to Oracle
Please help me
Thanks
-jebatco

This is a very specialized area you are looking at. My recommendation is that you look at SAP sites on Oracle.com for assistance. There is also a SAP Migration white paper you can read and the Oracle/SAP site.
Regards
Sue

Migration from DB2 to Oracle issue

Hi
I'm migrating an old legacy system from DB2 to Oracle but have the following trouble:
The queries that the app executes have some DB2-specific syntax such as DATE function, example:
select * from TABLE where date_col > DATE('2010/01/01');
The above query works on DB2 but not in Oracle (should be changed to use TO_DATE function but this is not possible initially)
I could create a function in the Oracle db called DATE, something like:
create function date (p_date varchar2) return date is
begin
return to_date(p_date)
end date;
create public synonym date for sys.date;
But DATE is a reserved word and I can't use it as function name
Do you know any way of making the above query work against an Oracle db or transforming the query text before being parsed?
Thanks a lot in advance
--Guillermo

As you stated and mentioned in the manual:
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e10830/appb.htm
DATE is a reserved word and thus you need to recode the statement. For example the migration utility is commonly adding an underscore to the function - and this requires again a recoding of the source statements.

DB2 to Oracle conversion using SQL Developer Migration Wizard - different schemas

I am performing a conversion between DB2 to Oracle 11 XE, using the SQL Developer Migration Wizard. Specifically I am trying to migrate the DB2User schema over to Oracle.
Using the migration wizard, when I pick the Oracle target connection to be the same schema ( DB2User schema ) the migration is successful and all data is converted.
However if I pick a different Oracle target connection ( say OracleUser ) , I run into issues.
Firstly , the table schema is not created. When I check the project output directory, the .out file has the following errors:
   CREATE USER DB2User IDENTIFIED BY DB2User DEFAULT TABLESPACE USERS TEMPORARY TABLESPACE TEMP
        SQL Error: ORA-01031: insufficient privileges
        01031. 00000 - "insufficient privileges"
    connect DB2User/DB2User
    Error report:
    Connection Failed
    Commit
    Connection created by CONNECT script command disconnected
I worked around this by manually executing the .sql in the project output directory using the OracleUser id in the new DB.
Then I continue with the migration wizard and perform the Move Data step.
Now - the message appears as succuessful, however, when I review the Migrationlog.xml file, i see errors as follows:
<level>SEVERE</level>
<class>oracle.dbtools.migration.workbench.core.logging.MigrationLogUtil</class>
<message>Failed to disable constraints: Data Move</message>
<key>DataMove.DISABLE_CONSTRAINTS_FAILED</key>
<catalog><null></catalog>
<param>Data Move</param>
<param>oracle.dbtools.migration.workbench.core.logging.LogInfo@753f827a</param>
<exception>
    <message>java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist</message>
<level>WARNING</level>
<class>oracle.dbtools.migration.datamove.online.TriggerHandler</class>
<message>ORA-01031: insufficient privileges
</message>
I think what is happening is that the wizard is attempting to perform the 'move data' process using the DB2User id.
How do I tell the wizard that the target schema is different than my source schema.
My requirement is that I need to be able to migrate the DB2User schema to different schemas in the same Oracle database
( since we will have multiple test environments under the same database ) .
Thanks in advance .
K.

Perhaps the following from the SQL Developer documentation is helpful for you:
Command-Line Interface for Migration
As an alternative to using the SQL Developer graphical interface for migration operations, you can use the migration batch file (Windows) or shell script (Linux) on the operating system command line. These files are located in the sqldeveloper\sqldeveloper\bin folder or sqldeveloper/sqldeveloper/bin directory under the location where you installed SQL Developer.
migration.bat or migration.sh accepts these commands: capture, convert, datamove, delcaptured, delconn, delconverted, driver, generate, guide, help, idmap, info, init, lscaptured, lsconn, lsconverted, mkconn, qm, runsql, and scan. For information about the syntax and options, start by running migration without any parameters at the system command prompt. For example:
C:\Program Files\sqldeveloper\sqldeveloper\bin>migration
You can use the -help option for information about one or more actions. For the most detailed information, including some examples, use the -help=guide option. For example:
C:\Program Files\sqldeveloper\sqldeveloper\bin>migration -help=guide
Regards
Wolfgang

DB2 to Oracle 11g migration

Hi,
We are migrating the siebel database from DB2 to Oracle 11g.
While doing the migration, the following values are found for the siebel related tables on DB2.
for example:
CREATE TABLE S_SERVICE_SCRPT (
ROW_ID NVARCHAR2(15) NOT NULL,
CREATED TIMESTAMP(9) DEFAULT CURRENT TIMESTAMP NOT NULL,
CREATED_BY NVARCHAR2(15) NOT NULL,
LAST_UPD TIMESTAMP(9) DEFAULT CURRENT TIMESTAMP NOT NULL,
LAST_UPD_BY NVARCHAR2(15) NOT NULL,
MODIFICATION_NUM DECIMAL DEFAULT 0 NOT NULL,
CONFLICT_ID NVARCHAR2(15) DEFAULT gx'00030' NOT NULL,
NAME NVARCHAR2(75) NOT NULL,
PROG_LANG NVARCHAR2(30) NOT NULL,
REPOSITORY_ID NVARCHAR2(15) NOT NULL,
Please can anybody provide inputs how to get the equivalent for these gx___ values on Oracle 11g.
Many thanks in advance

Found a suitable link at IBM:
http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=/com.ibm.db29.doc.sqlref/db2z_sql_declareglobaltemptable.htm
gx is the hexadecimal graphic string constant - which is similar to our unistr function.
Not sure which character is representated by 00030, but here's a method you can use to simply figure out the Oracle equivalent code point.
First you need to figure out the DB2 character represented by the default value - let's assume it is '@'
Assuming the NCHAR character set is UTF8 and the NLS character set is WE8MSWIN1252, then you can execute:
select ascii('@') from dual;
ASCII('@')
64
in SQL*Plus and you'll get the code point 64.
Convert the 8bit code point to unicode using:
SQL> select dump(convert(chr(64),'UTF8','WE8MSWIN1252'),16) from dual;
DUMP(CONVERT(CH
Typ=1 Len=1: 40
and you can create the table with the default value represented by the hex value 0040:
SQL> create table abc (col1 varchar2(20) default '@',
2 col2 nvarchar2(20) default unistr('\0040'));
Table created.
SQL> insert into abc values (default,default);
1 row created.
SQL> select * from abc;
COL1 COL2
@ @

IBM DB2 to Oracle Database Migration Using SQL Developer

Hi,
We are doing migration of the whole database from IBM DB2 8.2 which is running in WINDOWS to Oracle 11g Database in LINUX.
As part of pre-requisites we have installed the Oracle SQL Developer 4.0.1 (4.0.1.14.48) in Linux Server with JDK 1.7. Also Established a connection with Oracle Database.
Questions:
1) How can we enable the Third Party Database Connectivity in SQL Developer?
I have copied the files db2jcc.jar and db2jcc_license_cu.jar from the IBM DB2 (Windows) to Oracle (Linux)
2) Will these JAR files are universal drivers? will these jar files will support in Linux platform?
3) I got a DB2 full privileged schema name "assistdba", Shall i create a new user with the same name "assistdba" in the Oracle Database & grant DBA Privillege? (This is for Repository Creation)
4) We have around 35GB of data in DB2, shall i proceed with ONLINE CAPTURE during the migration?
5) Do you have any approx. estimation of Time to migrate a 35 GB of data?
6) In-case of any issue during the migration activity, shall i get an support from Oracle Team (We have a Valid Support ID)?
7) What are all the necessary Test Cases to confirm the status of VALID Migration?
Request you to share the relevant metalink documents!!!
Kindly guide me in-order to go-ahead with the successful migration.
Thanks in Advance!!!
Nagu
[email protected]

Hi Klaus,
Continued with the above posts - Now we are doing another database migration from IBM DB2 to Oracle, which is very less of data (Eg: 20 Tables & 22 Indexes).
As like previous database migration, we have done the pre-requirement steps.
DB Using SQL Developer
Created Migration Repository
Connected with the created User in SQL Developer
Captured the Source Database
Converted Captured Model to Oracle
Before Translation Phase we have clicked on the "Proceed Summary"
Captured Database Objects & Converted Database Objects has been created under PROJECT section.
Here while checking the status of captured & converted database objects, It's showing the below chart as sample:
OVERVIEW
PHASE               TABLE DETAILS          TABLE PCT
CAPTURE               20/20                              100%
CONVERT               20/20                              100%
COMPILE                 0/20                                   0%
TARGET STATUS
DESC_OBJECT_NAME
SCHEMANAME
OBJECTNAME
STATUS
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:ARG_I1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H0INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H1INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H2INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H3INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H4INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H4INDEX02:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H5INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H7INDEX01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:H7INDEX02:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:MAPIREP1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:MAPISWIFT1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:MAPITRAN1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:OBJ_I1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:OPR_I1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:PRD_I1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:S1TABLE01:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:STMT_I1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:STM_I1:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
INDEX
TRADEIN1
SQLDEV:LINK:&SQLDEVPREF_TARGETCONN:null:TRADEIN1:INDEX:X0IAS39:oracle.dbtools.migration.workbench.core.ConnectionAwareDrillLink
Missing
We have seen only "Missing" in the chart, also we couldn't have any option to trace it in Log file.
Only after the status is VALID, we can proceed with the Translation & Migration PHASE.
Kindly help us how to approach this issue now.
Thanks
Nagu

Db2/400 (V5R2) to Oracle Migration.

Can anybody tell me how can we do migration from V5R2 to oracle?
Is there any free tool is available?
Where can I get documentation for V5R2 to Oracle migration?

Hi,
I am not aware of any other tool which could help here.
I would suggest you log a SR or contact an Oracle Sales representative.
Regards,
Hussein

Oracle Migration Workbench DB2 UDB 8.1 Plugins..

I want to migrate db2 udb 8.1 database to oracle 10g ...But iam not able to find the plugins for db2 udb 8.1 in oracle site...... Oracle migration workbench is asking for db2 8.1 plugins can u suggest where i can download ....

From an earlier post on this forum, found by searching for db2:
No plans for DB2 V8 support in the short term. The plugins are hardwired to work against the version they are built against, so it won't work with V7. There are other alternatives out there. One example would be from Ispirer: http://www.ispirer.com/products/ or
from SwisSQL: http://www.swissql.com/oracle-migration.html
[I assume 'so it won't work with V7' in the source post should read 'so the db2 v7 plugin will not work with anything other than db2 v7']

Regarding Doubt of oracle upgrade and oracle migration

Hello,
What is the diffrence between oracle upgrade and oracle migration, duirng any one of this is oracle going to touch oracle database and its data?
Regards,
V.Singh

Singh wrote:
Oracle migration means most likely from non-oracle database to migrate to oracle DB or lower hardware platform to higher/advance hardware platformI would say so. Note Oracle was also confused about word "+migrate+" since it was used till 9i to open the database in a special mode to upgrade the database itself. Nowadays, on 10g+, the command became "+upgrade+".
In oracle upgrade we are updating oracle's new software version (9i to 10g) or patchset (102.0.2 to 102.0.4), once software is updated we giving command statup upgrade , during this phase some scripts are updating data so i belive it is updating oracle realted views,data dictionary,functions,triggers etc etc , instead of touching oracle data.Yes, upgrade script modify Oracle data and objects dictionary, but do not modify user's data and objects (if we expect a recompile of invalide objects as recommanded by the latest step of an upgrade).
Nicolas.

Queries regarding DB2 to Oracle migration

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