# Which Problems Are Solved
This PR introduces the possibility of using the relational DB when
calling the ListSession gRPC endpoint.
# How the Problems Are Solved
- Implement the Querier interface for ListSession:
- Create a `domain` model for the Session object to be able to map the
gRPC session into it.
- Match the permission filters on ES side to be sure the same sessions
are returned
- Implement converter methods to go from `gRPC` to `domain` models (both
ways)
- Fix the session sql relational migration: rework the trigger to update
the `expiration` field to perform the update only when the input
`lifetime` has a non-zero value.
- Link the Querier implementation with the gRPC endpoint
- Run the same integration tests against the relational DB, making sure
the outcome is the same. ⚠️ Due to missing permission checks, some
divergence is expected. Hence, specific code to circumvent the
differences has been put in place
# Additional Context
- Closes#11039
Marco A.andGitHub
14acc60edd