The Percolator is a special type field that makes it possible to store an Elasticsearch query inside the field and use it in percolator query.
The Percolator can be used to detect all queries that match a document.
Mapping a Percolator field
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. I suggest using Kibana console, which provides code completion and better character escaping for Elasticsearch.
