August 2019
Intermediate to advanced
560 pages
13h 41m
English
Content preview from Advanced Elasticsearch 7.0
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Retrieving multiple documents
The Multi get API, _mget, can retrieve multiple documents through a _docs array of index and identifier pairs given by users. Similar to the simple get API, you can also specify the required field names in the optional _source field in each pair. Before we start to run the example, let us index the removed ACWF ETF document again so that we have two documents in the cf_etf index. Recall that we have indexed two documents to the cf_view index in the last chapter. Let's issue an _mget request to retrieve one document from each index:
If all required documents are under the same index and all the document contents ...
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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.