如何排除elasticsearch映射中"_all“中的所有数字和日期

{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_analyzer": {
          "type": "custom",
          "tokenizer": "standard",
          "char_filter": [
            "my_char_filter"
          ]
        }
      },
      "char_filter": {
        "my_char_filter": {
          "type": "pattern_replace",
          "pattern": "\\d+|\\d{4}-\\d{2}-\\d{2}",
          "replacement": ""
        }
      }
    }
  }
}

{
  "mappings": {
    "properties": {
      "_all": {
        "type": "text",
        "analyzer": "my_analyzer"
      }
    }
  }
}