Elasticsearch 7 Quick Start Guide

Mixing exact search with stemming

When building a search query, stemming is a necessary component. Stemming is the process of reducing words to their root form—as shown throughout the examples in Chapter 3, Many as One – the Distributed Model. For example, when looking for paid, your search may return pay, paid, and paying. To be able to return the word paid specifically, we can use a multi-field. I have explained multi-fields in Chapter 4, Prepping Your Data – Text Analysis and Mapping. In the following example, we are creating the index with the english analyzer:

PUT index{  "settings": {    "analysis": {      "analyzer": {        "english_exact": {          "tokenizer": "standard",          "filter": [            "lowercase"          ]        }      }    }  },  "mappings": {    "properties": {      "body": { "type": ...