Is there a way to create an immutable value in a document with Vespa

Question

Is is possible to create a new Vespa doc and have one key/value pair immutable for the life of that doc?

Answer 1

There's no build-in support for that so you'd need to create a document processor to reject updates to that field.

If you also want to reject attempts to put the whole document again, the processor would have to use the document API to check if each document already existed. That is doable but would slow down your write rate.