Under /redhat there is a RPM spec file to create zabbix-server-oracle
package, based in the original by Kodai Terashima kodai.terashima@zabbix.com
from the Zabbix official repo at http://repo.zabbix.com.
In order to build the package it's necessary to install the Oracle Instant Client packages available at http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html
Some include file from Oracle overlaps with openldap-devel, so it's necessary to do something like this to build the package:
mv /usr/include/oracle/11.2/client64/ldap.h /usr/include/oracle/11.2/client64/ldap.h.disabled
(that's related to what it's described here https://www.zabbix.com/forum/showthread.php?t=20066)
To install zabbix-server-oracle, as it provides something that zabbix-server requires and the other way around, a quick solution is:
rpm -i zabbix-server-2.0.9-1.el6.x86_64.rpm zabbix-server-oracle-2.0.9-1.el6.x86_64.rpm
Last, but not least, to build we require the package rpm-macros-rpmforge (http://pkgs.repoforge.org/rpm-macros-rpmforge/) to let rpmnuild filter out the creation of Requires for libs that they are not explicitly provided by the Oracle packages.