Each patch contains a cumulative set of fixes produced since the last Service Pack or Release, whichever is the later, and hence includes all fixes previously issued. It can only be applied on to that specific version (e.g. 2.3 SP4). The patch has undergone Actian internal engineering tests, is fully supported by Actian but has not undergone the full QA test suite which is run for both full releases and Service Packs.
This release is subject to your signed software license agreement from Actian or (if none) the license agreement included with the product.