Issue in oracle upgrade from 9i to 10g.

Hi,
I have an MS access application running on oracle database.Recently database is upgraded from 9i to 10g.
After upgrade application is facing the conversion problem.it is throwing an error on varchar and time stamp field showing invalid timestamp message.NLS setting of both the version is same.Please suggest.

Thank you,
Here are the answers of your queries.
Yes,This is affecting only MS access application because no other application is accessing this database.
No,No other component of the application is changed or upgraded it is only database which is upgraded.
The error is ORA-06502:PL/SQL:numeric or value error:Character to number conversion error.(In the application the value of this field is defind as Double and in database table it is VarChar and the system was working fine untill database upgrade after upgrade it is giving above error.)
For another field it is giving the error "No valid timestamp" although the same was working fine before upgrade.
No I have not traced the actual sessions but from the backup of 9i I have checked NLS setting and compared it with 10g and found that both are the same.
Hope I have not confused you.

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Sorting issue after upgrade from 9i to 10g

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In 9i, even if the SQL statement does not specify the ORDER BY clause, the sorting order is consistent for a particular SQL statement and most likely the sequence follows the searched key fields' order.
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903714 wrote:
Dear all,
It is found that the sorting behavior is different after upgrade from 9i to 10g.
In 9i, even if the SQL statement does not specify the ORDER BY clause, the sorting order is consistent for a particular SQL statement and most likely the sequence follows the searched key fields' order.
After upgrade to 10g, the query output could vary as long as the SQL statement does not specify the ORDER BY clause.
Is it due to the Reverse Docid Sorting issue? How can I troubleshoot this issue?
Thanks for your help,
M.T. This is expected behavior in 10g. Oracle will not order the dataset for you unless and until you explicitly specify it.
So without using order by clause in 10g, oracle doesn't guarantee that rows will be ordered.
To go back to old behavior like 9i, you can set a workaround by
alter session set "_newsort_enabled"=false;
Also see MOS - Order Of Data Retrieval Differs after upgrading 9i To 10g [ID 456707.1]

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Hi Deepak/Folks,
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MOPatch - Install Multiple Oracle Patches in One Run - 2.1.15.
Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
Version:       2.1.15
Revision:      5.1.2.26
Command-line: /oracle/<SID>/11203/MOPatch/mopatch.sh -v -s SAP11203P_1312-20009978.zip
Oracle Home:   /oracle/<SID>/11203
RDBMS version: 11.2.0.3.0
OPatch version:11.2.0.3.3
Clean-up:      supported
PSUs:          supported
Log file:      $ORACLE_HOME/cfgtoollogs/mopatch/mopatch-2014_08_06-15-01-51.log
Patch base:    .
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Link script:   ./link.mts<SID>ua.sh
Readmes:       <none>
Strpd. Readmes:<none>
make utility: /usr/ccs/bin/make
unzip utility: /oracle/<SID>/11203/bin/unzip
User name:     ora<SID>
Working dir:   /oracle/stage
System:        HP-UX mts<SID>ua B.11.31 U ia64 2468369872 unlimited-user license
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Disk required: 886496 KBytes on /oracle/<SID>
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executing: "/oracle/<SID>/11203/OPatch/opatch" lsinventory -retry 0 -xml "./mopatch-187-21696-tmpdir/preinv.xml"
========================================================
GENERIC OPATCH VERSION - FOR USE IN SAP ENVIRONMENT ONLY
========================================================
Oracle Interim Patch Installer version 11.2.0.3.3
Copyright (c) 2012, Oracle Corporation. All rights reserved.
Oracle Home       : /oracle/<SID>/11203
Central Inventory : /oracle/<SID>/oraInventory
   from           : /oracle/<SID>/11203/oraInst.loc
OPatch version    : 11.2.0.3.3
OUI version       : 11.2.0.3.0
Log file location : /oracle/<SID>/11203/cfgtoollogs/opatch/opatch2014-08-06_15-01-56PM_1.log
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Possible causes are:
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LsInventorySession failed: OracleHomeInventory gets null oracleHomeInfo
OPatch failed with error code 73
Getting pre-run patch inventory...failed.
Cannot get pre-run patch inventory. Exiting.
I would appreciate if you folks can help me out on this
Thanks
APS

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We are using Oracle JDBC Driver version - 10.1.0.5.0 .
In the application, when RMI server starts, the connectionpool (developed using stack) will be filled with 10 instances of fresh connections.
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Exception------
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at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:162)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:274)
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at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
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