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I'm having a problem with unixODBC SQLFetch call.
Hello,
We have an application which we are in the process of porting from Windows to Linux. The ultimate target is an IBM S390X 64-bit zLinux machine. We are using unixODBC 2.2.13 and DB2 v9.1. We have successfully ported the code to another 64-bit machine (i386 architecture) run Gentoo Linux and it works. However, on the zLinux machine I have the following problem, and it is very strange. If I ever repeat the same query, it fails. For example, if I have a query of the form SELECT * FROM SomeTable, it will work the very first time. If that same query is every performed again it fails. The failure seems to be related to the SQLFetch that retrieves the result set. I am using the SQLBindCol API to bind my data structure to the expected result set. The query is execute by SQLExecDirect. The second time the query is run, I appear to get garbarge. More specifically, some of the expected field data is in the structure if you look at it as a chunk of memory, but it is offeset in the wrong locations, and in some cases missing. I have run both ODBC and CLI traces and everything appears normal at that point. The failure appears to be in the SQLFetch call itself.
Again, the failure only occurs on this particular platform. We have used this code on other platforms successfully. I should add we are working in C/C++.
Has anyone ever encountered a problem such as this? I don't have a code snippet because the SQL calls are encapsulated in our own library calls.
Thanks much.
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by: KdoPosted on 2008-05-19 at 12:14:00ID: 21600650
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