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+# Check if we can safely upgrade. An upgrade is only safe if it's from one
+# of our RPMs in the same version family.
+
+installed=`rpm -q --whatprovides mysql-server 2> /dev/null`
+if [ $? -eq 0 -a -n "$installed" ]; then
+ installed=`echo "$installed"|sed -n 1p`
+ vendor=`rpm -q --queryformat='%{VENDOR}' "$installed" 2>&1 | sed 's/Monty Program AB/MariaDB Foundation/'`
+ version=`rpm -q --queryformat='%{VERSION}' "$installed" 2>&1`
+ myvendor='%{mysql_vendor}'
+ myversion='%{mysqlversion}'
+
+ old_family=`echo $version | sed -n -e 's,^\([1-9][0-9]*\.[0-9][0-9]*\)\..*$,\1,p'`
+ new_family=`echo $myversion | sed -n -e 's,^\([1-9][0-9]*\.[0-9][0-9]*\)\..*$,\1,p'`
+
+ [ -z "$vendor" ] && vendor='<unknown>'
+ [ -z "$old_family" ] && old_family="<unrecognized version $version>"
+ [ -z "$new_family" ] && new_family="<bad package specification: version $myversion>"
+
+ error_text=
+ if [ "$vendor" != "$myvendor" ]; then
+ error_text="$error_text
+The current MariaDB server package is provided by a different
+vendor ($vendor) than $myvendor. Some files may be installed
+to different locations, including log files and the service
+startup script in %{_sysconfdir}/init.d/.
+"
+ fi
+
+ if [ "$old_family" != "$new_family" ]; then
+ error_text="$error_text
+Upgrading directly from MySQL $old_family to MariaDB $new_family may not
+be safe in all cases. A manual dump and restore using mysqldump is
+recommended. It is important to review the MariaDB manual's Upgrading
+section for version-specific incompatibilities.
+"
+ fi
+
+ if [ -n "$error_text" ]; then
+ cat <<HERE >&2
+
+******************************************************************
+A MySQL or MariaDB server package ($installed) is installed.
+$error_text
+A manual upgrade is required.
+
+- Ensure that you have a complete, working backup of your data and my.cnf
+ files
+- Shut down the MySQL server cleanly
+- Remove the existing MySQL packages. Usually this command will
+ list the packages you should remove:
+ rpm -qa | grep -i '^mysql-'
+
+ You may choose to use 'rpm --nodeps -ev <package-name>' to remove
+ the package which contains the mysqlclient shared library. The
+ library will be reinstalled by the MariaDB-shared package.
+- Install the new MariaDB packages supplied by $myvendor
+- Ensure that the MariaDB server is started
+- Run the 'mysql_upgrade' program
+
+This is a brief description of the upgrade process. Important details
+can be found in the MariaDB manual, in the Upgrading section.
+******************************************************************
+HERE
+ exit 1
+ fi
+fi
+