{
  "analysis": {
    "analyzer": {
      "trigrams": {
        "filter": [
          "lowercase"
        ],
        "tokenizer": "my_ngram_tokenizer"
      }
    },
    "tokenizer": {
      "my_ngram_tokenizer": {
        "type": "nGram",
        "min_gram": "3",
        "max_gram": "3",
        "token_chars": [
          "letter",
          "digit",
          "symbol",
          "punctuation"
        ]
      }
    }
  }
}
{
  "analysis": {
    "analyzer": {
      "trigrams": {
        "filter": [
          "lowercase"
        ],
        "tokenizer": "my_ngram_tokenizer"
      }
    },
    "tokenizer": {
      "my_ngram_tokenizer": {
        "type": "nGram",
        "min_gram": "3",
        "max_gram": "3"
      }
    }
  }
}
Use all characters for trigram tokenizer
Use all characters for trigram tokenizer
