Napa is an internal DBMS developed at Google to support real-time analytical workloads.
Napa was developed as a successor to the Mesa DBMS project.
Relational
SQL
Custom
Decomposition Storage Model (Columnar)
Shared-Disk
Materialized Views
https://research.google/pubs/pub50617/
Google
US
2018
Internal / Non-Public
C++
Linux
Proprietary