August 2019
Intermediate to advanced
560 pages
13h 41m
English
Content preview from Advanced Elasticsearch 7.0
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Views on a subset of documents
In a SQL database, a view is a SQL statement that is stored in the database using a name. In Elasticsearch, a filtered alias provides a similar capability to access a subset of documents from the underlying indices. A filtered alias can be applied to search APIs, count APIs, delete by query APIs, and so on. To create a filtered alias, you need to ensure that the X field already exists in the index mapping, and then you can create an alias that uses the filter on the X field. Although we haven't yet presented the document and mappings yet we will still have a quick look through an end-to-end example. The step-by-step instructions are as follows:
- Create a new index, cf_view, with a mapping to tell Elasticsearch ...
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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.