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Learning Elasticsearch

You're reading from   Learning Elasticsearch Structured and unstructured data using distributed real-time search and analytics

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781787128453
Length 404 pages
Edition 1st Edition
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Author (1):
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Abhishek Andhavarapu Abhishek Andhavarapu
Author Profile Icon Abhishek Andhavarapu
Abhishek Andhavarapu
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Toc

Table of Contents (11) Chapters Close

Preface 1. Introduction to Elasticsearch FREE CHAPTER 2. Setting Up Elasticsearch and Kibana 3. Modeling Your Data and Document Relations 4. Indexing and Updating Your Data 5. Organizing Your Data and Bulk Data Ingestion 6. All About Search 7. More Than a Search Engine (Geofilters, Autocomplete, and More) 8. How to Slice and Dice Your Data Using Aggregations 9. Production and Beyond 10. Exploring Elastic Stack (Elastic Cloud, Security, Graph, and Alerting)

Querying Elasticsearch

One of most powerful features of Elasticsearch is the Query DSL (Domain specific Language) or the query language. The query language is very expressive and can be used to define filters, queries, sorting, pagination, and aggregations in the same query. To execute a search query, an HTTP request should be sent to the _search endpoint. The index and type on which the query should be executed is specified in the URL. Index and type are optional. If no index/type is specified, Elasticsearch executes the request across all the indexes in the cluster. A search query in Elasticsearch can be executed in two different ways:

  • By passing the search request as query parameters.
  • By passing the search request in the request body.

A simple search query using query parameters is shown here:

GET chapter6/product/_search?q=product_name:jacket

Simple queries can be executed...

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