Using Legacy Drivers
The Vertica server supports connections from the previous version of the client drivers. For example, the Vertica version 5.1 server works with the 4.1 client drivers, since they were the drivers distributed with the previous version of the server. This backwards compatibility lets you upgrade your Vertica database first, then later upgrade your clients.
If you have not yet updated your code to work with the new version of the Vertica client drivers, you can continue to use the older drivers until you do. If you need to install your client application on a new client system, you can download and install the older drivers. See myVertica portal to download the installers; find installation documentation at http://my.vertica.com/docs.
For detailed information on which the compatibility of different versions of the Vertica server and Vertica client, see Client Driver and Server Version Compatibility.
Note: The support for a previous version of the drivers is usually eliminated in the next release of Vertica. For example, the Vertica version 5.1 server does not support the version 4.0 drivers. You should update your client application to work with the new client drivers as soon as possible.