June 2017
Beginner to intermediate
404 pages
8h 22m
English
Content preview from Learning Elasticsearch
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Aggregations on nested documents
Just like children aggregation, aggregation on nested documents is also supported. The product variations are stored as nested documents. A sample product document is as follows:
PUT chapter8/product/2?refresh=true { "product_name": "iPhone 7", "manufacturer": "Apple", "variations": [ #Nested documents { "color": "Rose Gold", "storage": "128GB", "unit_price": "900" }, { "color": "Rose Gold", "storage": "64GB", "unit_price": "800" } ] }
Suppose we want to find the storage options available for each color. First, we group the products by their color using terms aggregations and then aggregate using the storage. Just like children aggregation, to run aggregation on nested document, the path should be mentioned ...
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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.