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Elasticsearch 8.x Cookbook - Fifth Edition

You're reading from  Elasticsearch 8.x Cookbook - Fifth Edition

Product type Book
Published in May 2022
Publisher Packt
ISBN-13 9781801079815
Pages 750 pages
Edition 5th Edition
Languages
Author (1):
Alberto Paro Alberto Paro
Profile icon Alberto Paro

Table of Contents (20) Chapters

Preface Chapter 1: Getting Started Chapter 2: Managing Mappings Chapter 3: Basic Operations Chapter 4: Exploring Search Capabilities Chapter 5: Text and Numeric Queries Chapter 6: Relationships and Geo Queries Chapter 7: Aggregations Chapter 8: Scripting in Elasticsearch Chapter 9: Managing Clusters Chapter 10: Backups and Restoring Data Chapter 11: User Interfaces Chapter 12: Using the Ingest Module Chapter 13: Java Integration Chapter 14: Scala Integration Chapter 15: Python Integration Chapter 16: Plugin Development Chapter 17: Big Data Integration Chapter 18: X-Pack Other Books You May Enjoy

Using the has_parent query

In the previous recipe, we saw the has_child query. Elasticsearch also provides a query to search child documents based on the parent query, has_parent, which complements the previous query.

Getting ready

You need an up-and-running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 1Getting Started.

To execute these commands, I suggest using the Kibana console, as this provides code completion and better character escaping for Elasticsearch.

To correctly execute the following commands, you will need an index populated with the ch04/populate_kibana.txt commands, which are available in the online code. The index that's used in this recipe is mybooks-join.

How to do it...

To execute the has_parent query, we will perform the following steps:

  1. We want to search for the children (author) of the parent (book) that has the bill term in...
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