12101 and 12120 both have MYSQL hardcoded in the HASetup.sh script
after breaking my HA setup during my upgrade to 12120, I can't reestablish HA because the HASetup.sh file contains these statements:
-------------------------------------------
#!/bin/sh
. ./../scripts/setCommonEnv.sh
DB_HOME=$SERVER_HOME/mysql
if [ -S $DB_HOME/tmp/mysql.sock ]; then
echo "MySQL server seems to be running. Shutdown MySQL server to extract replication package."
exit 1
fi
-----------------------------------------------
and there's no mysql in this installation.
If I examine setCommonEnv.sh, it /is/ the pgsql version of the file.