Elasticsearch Blueprints

Substring matching

By now, you would have noticed that only exact word matches are taken as result qualifiers. What if I want an incomplete token or word to be matched?

For example, when I search for titani, it should match against titanium because titani is an incomplete form of titanium.

For this kind of purpose, it would be best to use the EdgeNGram-based analyzer.

First let's create the analyzer:

curl -X PUT "http://localhost:9200/my-index" -d '{
  "index": {
    "number_of_shards": 1,
    "number_of_replicas": 1
  },
  "analysis": {
    "filter": {
      "ngram": {
        "type": "edgeNgram",
        "min_gram": 1,
  "max_gram" : 50
      }
    },
    "analyzer": {
      "NGramAnalyzer": {
        "type": "custom",
        "tokenizer" : "standard", 
        "filter": "ngram"
      }
    }
  } 
}'  

Here, we are creating an edge NGram filter, ...