Apama-like script engine for reading data from database

Sometimes it would be helpful to have a real time engine for outgoing data, like Apama for incoming data.

We could change values of measurements to other units or filter data before they get send to the client.

Maybe we can use it for calculating average or sum values. No need to calculate them on the client side or create an microservice. Just a little script which can do it for us and send the result only.