What is needed is a way to use something like the new language presented here against existing relational databases, preferably in a way that doesn't involve se

What is needed is a way to use something like the new language presented here against existing relational databases, preferably in a way that doesn't involve sending queries as plain text strings back to the database engine - query compilation should happen in the client library, and be sent to the database as some sort of bytecode. Support for this bytecode should be added to Postgres, MySQL etc, not some new database product. Projects should be able to mix old style SQL queries and queries written in the new language at will.