RonDB have an interpreter that can execute a set of simple things. It is mostly used to push filtering, to push increments/decrements. There is also a pushdown

RonDB have an interpreter that can execute a set of simple things. It is mostly used to push filtering, to push increments/decrements. There is also a pushdown join processor in it. It wouldn't be very hard to build more functionality into the interpreter. The interpreted programs is created by the NDB API and executed by the data owner. Thus the intermediate parts like transaction handler has no idea what it is passing along.