Nik Everett 55107ce8ae Docs: Refine note about after_key (#50475)
* Docs: Refine note about `after_key`

I was curious about composite aggregations, specifically I wanted to
know how to write a composite aggregation that had all of its buckets
filtered out so you *had* to use the `after_key`. Then I saw that we've
declared composite aggregations not to work with pipelines in #44180. So
I'm not sure you *can* do that any more. Which makes the note about
`after_key` inaccurate. This rejiggers that section of the docs a little
so it is more obvious that you send the `after_key` back to us. And so
it is more obvious that you should *only* use the `after_key` that we
give you rather than try to work it out for yourself.

* Apply suggestions from code review

Co-Authored-By: James Rodewig <james.rodewig@elastic.co>

Co-authored-by: James Rodewig <james.rodewig@elastic.co>
2020-01-02 10:03:23 -05:00
..