Executing children aggregations

This kind of aggregation allows for executing analytics, based on parent documents, on child documents. When working with complex structures, the nested objects are very common.

Getting ready

You need an up-and-running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.

To execute curl via the command line, you need to install curl for your operative system.

To correctly execute the following command, you need an index populated with the chapter_08/populate_aggregations.sh script available in the online code.

How to do it...

For executing children aggregations, we will perform the following steps:

1. We must index documents with child/parent relations, as discussed in the Managing a child document recipe in Chapter 3, Managing Mappings. For the following example, we will use the same dataset of the child query.

2. We want execute a terms aggregation on the uuid of the parent and for every...