Using a regexp query

In the previous recipes, we have seen different term queries (terms, prefix, and wildcard); another powerful term query is the regexp (regular expression) one.

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 the commands, any HTTP client can be used, such as curl (https://curl.haxx.se/), postman (https://www.getpostman.com/), or similar. I suggest you use a Kibana console as it 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...