missing libmariadb.so.3 on redhat 7

I have tried just about everything. But an app that has worked before does not because libmariadb.so.3 is missing. I have done a find from / and there are no libmaria files at all.

This is what I did to install:

cat > /etc/yum.repos.d/MariaDB.repo <<- "EOF" #Need mariadb 10.2 (or later, presently defaults to 5.5)
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.2/rhel7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
EOF

echo " installing maria-db/mysql..." | tee -a /var/log/zmpLinuxSetup.log
yum install -y MariaDB-server MariaDB-client &>> /var/log/zmpLinuxSetup.log

The above does install maridb in as far as the mysql command line works.
However, I have an app that links in mysql-connector-c++-1.1.9. And that app produces the missing lib error.

[root@zvrhes update_redhat_1.7.32739_32740]# mysql -u root -pxxxx
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 10.2.8-MariaDB MariaDB Server

Copyright © 2000, 2017, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>