Hello! I want to use
search after to process all documents but document hasn't any unique field, only _id. That's why I want use _id for sorting. But there are some important note in search after docs about my case. I have several questions:
- Is overhead really big?
- Can I create script field with source
doc['_id'].valueor overhead will not disappear?
- Can I set
doc_value = truefor _id field (I using ids generated by myself, not auto-generated by elastic)?
Will appreciate for some advices.