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 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 commands, you need an index populated with the chapter_05/populate_query.sh script available in the online code.

How to do it...

For executing a regexp query, we will perform the following steps:

1. We can execute a regexp term query from the command line:

           curl -XPOST 'http://127.0.0.1:9200/test-index/test-
           type/_search?pretty=true' -d '{
               "query": {
                   "regexp": {
                        "parsedtext": {
                           "value": "j.*",
                  ...