February 2017
Intermediate to advanced
696 pages
12h 24m
English
Content preview from Elasticsearch 5.x Cookbook - Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Updating by query
In the previous chapter, we saw how to update a document (Chapter 4, Basic Operations, Update a document recipe).
The update_by_query API call allows the user to execute the update on all the documents that match a query. It is very useful if you need to do the following:
- Reindex a subset of your records that match a query. It's common if you change your document mapping and need the documents to be reprocessed.
- Update values of your records the match a query.
This functionality is provided by an additional module called reindex that is installed by default.
Getting ready
You will need an up-and-running Elasticsearch installation as used in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.
To ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.