To ensure compatibility between the application service and the database, use the appropriate database client libraries and install a client software that is compatible with the database version.
When you upgrade Informatica services, ensure that you install the appropriate database client on the machine that runs the Data Integration Service.
Install the following database client software based on the type of database that the application service accesses:
IBM DB2 Client Application Enabler (CAE)
Configure connectivity on the required machines by logging in to the machine as the user who starts Informatica services.
Microsoft SQL Server 2012 Native Client
Install compatible versions of the Oracle client and Oracle database server. You must also install the same version of the Oracle client on all machines that require it. To verify compatibility, contact Oracle.
Sybase Open Client (OCS)
Install an Open Client version that is compatible with the Sybase ASE database server. You must also install the same version of Open Client on the machines hosting the Sybase ASE database and Informatica. To verify compatibility, contact Sybase.