According the Splunk, if your database not listed in Splunk DB Connect 3, is necessary configure the new database according the link
Was Configurated according this
After this, the splunk was restarted and no have any information of this database in my Splunk Db Connect
For undefined/unsupported databases, you'll need to:
Add custom database to db_connection_type.conf
example of db_connection_type.conf:
displayName = dummy_DB
serviceClass = com.splunk.dbx2.DefaultDBX2JDBC
jdbcDriverClass = $JDBC driver class$
jdbcUrlFormat = $JDBC URI Format$
ui_default_catalog = $database$
Once you restarted Splunk, you can go configuration -> Connections -> New connection.
dummy_DB should be available in dropdownlist of "Connection Type"
your can also refer here:
You need configurate:
And continue the next steps, check this (https://docs.splunk.com/Documentation/DBX/3.1.4/DeployDBX/Createandmanagedatabaseinputs)