CrateDB + Apache NiFi
CrateDB is a hyper-fast opensource distributed database technology that combines the best out of the SQL and NoSQL worlds. It supports the PostgreSQL wire protocol for easy integration with many data engineering tools.
Apache NiFi is an open-source data integration tool that allows users to automate the flow of data between systems, applications, and devices. It supports powerful and scalable directed graphs of data routing, transformation, and system mediation logic.