If you have used Adaptive Server 15.0.3 features that are not available in the Adaptive Server version you are downgrading to, additional steps may be necessary before downgrading your server. In addition, some actions must be performed immediately after downgrading. Below is a list of 15.0.3 features that require manual downgrade procedures.
Java in Adaptive Server – This is a new feature in Adaptive Server 15.0.3. If user classes compiled by a Java version above 1.2 are installed, these classes do not work in pre-15.0.3 Adaptive Server versions. Earlier versions of Adaptive Server ignore the enable pci parameter. You can remove it. sybpcidb is not used by pre-15.0.3 Adaptive Server versions. This can be dropped if desired.
SQL Replication – See “Upgrading Servers with Replicated Databases,”
sp_addserver with <filter> parameter – If you used sp_addserver to create server entries with the filter parameter specified, you may have entries in sysservers.srvnetname column which are longer than 32 bytes. You must delete these entries before downgrade and add them back after downgrade.
If you are returning to version 15.0 or 15.0.1, you may need to take the additional manual steps described in the Downgrade chapter of the Installation Guide for Adaptive Server 15.0.2.
In general, no additional steps are required when you are returning to an Adaptive Server version in which the feature was already available.
