Sometimes, we need to reduce the number of hits in our aggregation to satisfy a particular filter. To obtain this result, filter aggregation is used.
The filter is one of the simpler ways to manipulate the bucket when filtering out values.
Executing filter aggregations
Getting ready
You need an up and running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 1, Getting Started.
To execute these commands, any HTTP client can be used, such as curl (https://curl.haxx.se/), Postman (https://www.getpostman.com/), or similar. Using the Kibana Console is recommended, as it provides code completion and better character escaping for Elasticsearch.
To...
