ROracle and select query empty

I am using Linux Oracle Client 9i and I am running my R scripts on a
Linux box. 

Does /usr/include/sqlca.h exist?  This is a Postgres file.  My hazy
memory is that this conflicts with an Oracle header; and that if
ROracle sees this one at compile time, you get empty query results.

Try renaming this file to something else, then rebuild ROracle.

-- Dave