elasticsearch suggest completion：逐字前缀联想

elasticsearch suggest completion：逐字前缀联想

Suggesters | Elasticsearch Guide [7.16] | Elastic

如果希望逐字前缀联想（电话号码，手机号，英文单词的一部分），可以使用如下索引配置：

{
  "mappings": {
          "properties": {
              "content": {
                  "type": "completion",
                  "analyzer": "ngram_analyzer"
              }

          }
  },   "settings": {
          "analysis": {
              "analyzer": {
                  "ngram_analyzer": {
                      "tokenizer": "ngram_tokenizer"
                  }
              },
              "tokenizer": {
                  "ngram_tokenizer": {
                      "type": "ngram",
                      "min_gram": 1,
                      "max_gram": 1,
                      "token_chars": [
                          "letter",
                          "digit"
                      ]
                  }
              }
          }
      }
}

如果是希望按照词，可以选择特定的一个分词方式，比如ik