First of all, I am running a 64 bit Ubuntu 7.04 but I need a 32 Bit Oracle for the application I am using. I have a 32 bit chroot setup. The setup for this is beyond the scope of this article. This version of Ubuntu ships with unixodbc version 2.2.11-13 . There is a symbol, SQLGetPrivateProfileStringW, defined in later versions that the Oracle 11g driver requires. This symbol is not defined in unixodbc version 2.2.11-13. Thus, you have to use the 10.2 Oracle Drivers.

I Downloaded 3 files from The Oracle tech download page for 32bit Linux: the instantclient, SQL Plus, and ODBC packages. I unzipped these in my directory ~/apps/oracle32 Which now looks like this:

adyoung@adyoung-laptop$ pwd
/home/adyoung/apps/oracle32/instantclient_10_2
adyoung@adyoung-laptop$ ls
classes12.jar libocci.so.10.1 libsqora.so.10.1 ojdbc14.jar
genezi libociei.so ODBC_IC_Readme_Linux.html sqlplus
glogin.sql libocijdbc10.so ODBCRelnotesJA.htm
libclntsh.so.10.1 libsqlplusic.so ODBCRelnotesUS.htm
libnnz10.so libsqlplus.so odbc_update_ini.sh

I created an entry in /chroot/etc/odbcinst.ini:

[Oracle 10g ODBC driver]
Description = Oracle ODBC driver for Oracle 10g
Driver = /home/adyoung/apps/oracle32/instantclient_10_2/libsqora.so.10.1
Setup =
FileUsage =
CPTimeout =
CPReuse =

And another in /chroot/etc/odbc.ini

[EMO]
Application Attributes = T
Attributes = W
BatchAutocommitMode = IfAllSuccessful
BindAsFLOAT = F
CloseCursor = F
DisableDPM = F
DisableMTS = T
Driver = Oracle 10g ODBC driver
DSN = EMO
EXECSchemaOpt =
EXECSyntax = T
Failover = T
FailoverDelay = 10
FailoverRetryCount = 10
FetchBufferSize = 64000
ForceWCHAR = F
Lobs = T
Longs = T
MetadataIdDefault = F
QueryTimeout = T
ResultSets = T
ServerName = 10.10.15.15/DRORACLE
SQLGetData extensions = F
Translation DLL =
Translation Option = 0
DisableRULEHint = T
UserID = adyoung
StatementCache=F
CacheBufferSize=20

Once again, DSN and IP Address have been changed to protect the guilty. To test the datasource, run:

sudo dchroot -d LD_LIBRARY_PATH=/home/adyoung/apps/oracle32/instantclient_10_2 DataManagerII

To just test sqlplus connectivity, from inside the chroot, run:

./sqlplus adyoung/adyoung@10.10.15.15/DRORACLE

Note that using the instant client, no TNSNAMES.ORA file is required.