BWA/SAP HANA will be used despite virtual characteristics/key figures

What causes this issue?

The query uses virtual characteristics or virtual key figures filled in
a BADI implementation. Optimized operations in BWA/HANA are switched on
at the same time. This influences the granularity of the database result
set as well as the format.
The BADI implementation must stick to the following rules to guarantee a
reliable and reproducible query result set:
It must be interchangeable with aggregation, as described in
<DS:NA.BRAIN_DEV152>this section.</>
It must only process the result set row by row, and not draw any
conclusions between multiple rows of the result set. In particular, no
totals can be calculated in the BADI implementation.

System Response

BWA/HANA is used despite virtual characteristics and key figures at
least up to "Optimized Access". More details can be found
<DS:DE.RSRTREXOPS>here.</>

How to fix this error?

The following solutions are possible, depending on the type of
operations performed in the BADI implementation:
You can specify a level of detail in the user exit that is the minimum
level for the reading of the data.
You can deactivate use of advanced operations in BWA/HANA for the
queries that use virtual key figures.
You can use formulas with exception aggregation instead of virtual key
figures.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.