When querying the Data Repository it may be required to use the Data Aggregator user to make sure the correct schema is used for the queries.
Release : DX NetOps Performance Management All Supported Relases
The Data Aggregator user can be found in the /opt/IMDataAggregator/apache-karaf-2.4.3/etc/dbconnection.cfg file as:
dbUser=<username>
For example:
dbUser=dauser
NOTE: Above uses the default installation path, your installation path may vary.