关于mysql:为-Elasticsearch-设置-updatetimeqbit

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本文对 Elasticsearch 7.13 无效
创立工夫（create_time）没找到好的实现形式
如果入库的数据不会更新，文中的 create_time 可等同于 update_time

创立 Ingest pipelines（script、date）

PUT _ingest/pipeline/add_update_time
{
  "processors": [
    {
      "script": {
        "lang": "painless",
        "source": """DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssX"); df.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai")); Date date = new Date(); ctx.update_time = df.format(date);"""
      }
    }
  ]
}

创立索引，并设置默认 pipeline

PUT my_index
{
  "settings": {"index.default_pipeline": "add_update_time"}
}

插入数据

POST my_index/_doc/1
{"title": "nothing"}

查看 mapping

GET my_index/_mapping

{
  "my_index" : {
    "mappings" : {
      "properties" : {
        "title" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "update_time" : {"type" : "date"}
      }
    }
  }
}

查问数据

GET my_index/_search
{
  "query": {
    "range": {
      "update_time": {
        "time_zone": "+08",        
        "gte": "2021-07-28T16:00:00", 
        "lte": "now"                  
      }
    }
  }
}

{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "update_time" : "2021-07-28T18:03:35+08",
          "title" : "nothing"
        }
      }
    ]
  }
}