Keyword analyzer

The keyword analyzer is a “noop” analyzer which returns the entire input string as a single token.

response = client.indices.analyze(
  body: {
    analyzer: 'keyword',
    text: "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
  }
)
puts response

POST _analyze
{
  "analyzer": "keyword",
  "text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}

The above sentence would produce the following single term:

[ The 2 QUICK Brown-Foxes jumped over the lazy dog's bone. ]

The keyword analyzer is not configurable.

The keyword analyzer consists of:

If you need to customize the keyword analyzer then you need to recreate it as a custom analyzer and modify it, usually by adding token filters. Usually, you should prefer the Keyword type when you want strings that are not split into tokens, but just in case you need it, this would recreate the built-in keyword analyzer and you can use it as a starting point for further customization:

response = client.indices.create(
  index: 'keyword_example',
  body: {
    settings: {
      analysis: {
        analyzer: {
          rebuilt_keyword: {
            tokenizer: 'keyword',
            filter: []
          }
        }
      }
    }
  }
)
puts response

PUT /keyword_example
{
  "settings": {
    "analysis": {
      "analyzer": {
        "rebuilt_keyword": {
          "tokenizer": "keyword",
          "filter": [         
          ]
        }
      }
    }
  }
}