It is not possible to have mariadb RPM and columnstore RPM installed on same system

reported to google group:

1. rpm -ihv mariadb-columnstore-1.0-1-x86_64-centos6-server.rpm
   Preparing... ########################################### [100%]

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A MySQL or MariaDB server package (MariaDB-server-10.1.14-1.el6.x86_64) is installed.

The current MariaDB server package is provided by a different
vendor (Monty Program AB) than MariaDB AB. Some files may be installed
to different locations, including log files and the service
startup script in /usr/local/mariadb/columnstore/mysql/init.d/.

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 MariaDB AB
• 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.
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error: %pre(mariadb-columnstore-server-1.0-1.el6.x86_64) scriptlet failed, exit status 1
error: install: %pre scriptlet failed (2), skipping mariadb-columnstore-server-1.0-1.el6