kibana设置mapping

demo:

PUT linewell_assets_mgt_fz_es/lw_devices/_mapping
{
  "properties": {
    "update_time": {
      "type": "text",
      "fielddata": true,
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    }
  }
}