We are developing a brand new SQL database system. It's going to be Open Source. It's developed in C and C++. It aims to protects people data privacy and data security by default and by design. With ACID, SQL and high performance.
Send multiple SQL queries (simple or complex) in a single REST call and get exactly the fields you need. Eliminate the over- and under-fetching problem that REST has and leverage the native HTTP caching methods.