* ds-querier: return error if failed to get ds client * add log line * no empty ref * fix test
This directory contains the code for the Grafana backend.
The contributor documentation for Grafana's backend is in /contribute/backend/README.md.
* ds-querier: return error if failed to get ds client * add log line * no empty ref * fix test
This directory contains the code for the Grafana backend.
The contributor documentation for Grafana's backend is in /contribute/backend/README.md.