To assist with the upgrade process, Sybase recommends that you set the OLDSYBASE environment variable to point to the old installation of Adaptive Server. If you set the OLDSYBASE environment variable to the old installation of the Adaptive Server, the upgrade utility will automatically populate input fields with the correct information as you perform the upgrade.
Install the new Adaptive Server into the same directory as the Adaptive Server you are upgrading. If you install it in a different directory, you must manually copy the sql.ini file to the new installation directory.
This section covers the upgrade process, and outlines the following tasks:
Installing version 12.5 software on the target computer. See Chapter 4, “Installing Sybase Servers.”
Upgrading the servers with syconfig or the Studio Installer software.
Post-upgrade tasks, and include enabling previous programs and databases, allowing them to utilize the new version’s functionality.
The installation procedure for Sybase Central and the Adaptive Server plug-in for Sybase Central changed. Beginning with version 12.0, Adaptive Server uses the following locations: Sybase Central in the x:\Program Files\Sybase\Sybase Central\win32 directory and Adaptive Server plug-in for Sybase Central in the %SYBASE% directory. Earlier versions used the x:\sybtools directory. Studio Installer modifies your CLASSPATH, PATH, Profiles, and Registry entries to these specific new locations.