October 2019
Beginner
186 pages
5h 39m
English
Content preview from Elasticsearch 7 Quick Start Guide
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Count API
The count API executes a query and retrieves the number of matches within that query. The query can be defined using a query string as a parameter or using Query DSL:
GET /facebook/_count{ "query": { "term": { "user": "cactus_flower" } }}
It can be applied to multiple indices. The request parameters can be any of the following:
- df: The default field to be used.
- analyzer: The name of the analyzer that's used to analyze the query string.
- default_operator: The default operator to be used. The default is OR and can be set to AND.
- lenient: Ignores format-based failures. It defaults to false.
- analyze_wildcard: Indicates whether a wildcard and prefix queries are to be analyzed. The default is false.
- terminate_after: Will retrieve whether ...
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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.
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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.