We have upgraded Oracle from 7.3.4 to 8.1.7.
A pro*C application is giving core dump in new Oracle environment,but works fine in older verion.
This is due to the absence of indicator variable when SELECT fetches no records.
One of the migration issues of Oracle8 with respect to Pro*C precompiler(release8.1.) also says
"If you are migrating an application from Pro*C release 1.3 or release 1.4, used since Oracle V6, to Oracle8, there is a major change in behavior if you do not use indicator variables. Oracle V6 does not return an error if you SELECT or FETCH a NULL into a host variable that has no associated indicator variable. With Oracle7, the normal behavior is that SELECTing or FETCHing a NULL into a host variable that has no associated indicator variable does cause an error.
The error code is ORA-01405 in SQLCODE and "22002" in SQLSTATE.
To avoid this error without re-coding your application, you can specify DBMS=V6, or you can specify UNSAFE_NULL=YES (as described on "UNSAFE_NULL" on page 9-37) with DBMS=V7 or V8 and MODE=ORACLE.However, Oracle recommends that you always use indicator variables in new Pro*C/C++ applications."
I did try using the above precompiler options in the makefile, but I still get core dump.
The second option of using indicator varaible is not preferred since the code is huge.
Also I am not sure how this application is working fine in Oracle7.3.4 since I don't find any of the above precompiler options in the makefile and without the above options there should be oracle error in Ver7.3.4.I checked the precompiler cfg file also but nothing is there in it.
I am not sure of the Pro*C precompiler version of the Oracle7.3.4.Any idea how to find out the precompiler version
Can anyone tell mehow to solve this problem?