ElasticSearch Cookbook - Second Edition

Using a regexp query/filter

In the previous recipes, we saw different term queries (terms, fuzzy, and prefix). Another powerful terms query is the regexp (regular expression) query.

Getting ready

You will need a working ElasticSearch cluster and an index populated with the script chapter_05/populate_query.sh, available in the code bundle for this book.

How to do it...

In order to execute a regexp query/filter, perform the following steps:

1. 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.*",
           "flags" : "INTERSECTION|COMPLEMENT|EMPTY"
         }
       }
     }
   }'
   

2. If scoring is not important, it's better to reformulate the query ...