Elasticsearch（六）| search(搜索)的命令行

有了数据就可以开始搜索。

官方文档地址：https://www.elastic.co/guide/en/elasticsearch/reference/current/search.html

准备测试数据

为了进行检索，插入一些测试数据：

curl --cacert http_ca.crt -u elastic -XPOST https://localhost:9200/test_record/_doc?pretty -H 'Content-Type: application/json' -d '{"key": "中华人民共和国","date":"2021-10-16T13:12:00", "counts":2}'
curl --cacert http_ca.crt -u elastic -XPOST https://localhost:9200/test_record/_doc?pretty -H 'Content-Type: application/json' -d '{"key": "中华人民共和国万岁","date":"2021-11-15T13:12:00", "counts":3}'
curl --cacert http_ca.crt -u elastic -XPOST https://localhost:9200/test_record/_doc?pretty -H 'Content-Type: application/json' -d '{"key": "中华人民共和国国旗","date":"2021-12-15T13:12:00", "counts":4}'

返回所有数据

获取索引下所有的数据：

curl --cacert http_ca.crt -u elastic -XGET https://localhost:9200/test_record/_search?pretty -H 'Content-Type: application/json' -d '{"query":{"match_all":{}}}'

如果成功返回下面内容
{
  "took" : 552,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "test_record",
        "_id" : "pzK5HIQB8xpN1XtdHm7Z",
        "_score" : 1.0,
        "_source" : {
          "mappings" : {
            "properties" : {
              "key" : "中华人民共和国国歌",
              "date" : "2021-10-15T13:12:00",
              "counts" : 1
            }
          }
        }
      },
      ...
    ]
  }
}

过滤返回

有时候只需要返回部分字段，可以使用下面命令：

curl --cacert http_ca.crt -u elastic -XGET https://localhost:9200/test_record/_search?pretty -H 'Content-Type: application/json' -d '{"query":{"match_all":{}},"_source":["key"]}'

如果成功返回下面内容
{
  "took" : 199,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "test_record",
        "_id" : "pzK5HIQB8xpN1XtdHm7Z",
        "_score" : 1.0,
        "_source" : {
          "key" : "中华人民共和国国歌"
        }
      },
      {
        "_index" : "test_record",
        "_id" : "qDK5HIQB8xpN1Xtdcm4P",
        "_score" : 1.0,
        "_source" : {
          "key" : "中华人民共和国"
        }
      },
      {
        "_index" : "test_record",
        "_id" : "qTK5HIQB8xpN1Xtdm245",
        "_score" : 1.0,
        "_source" : {
          "key" : "中华人民共和国万岁"
        }
      },
      {
        "_index" : "test_record",
        "_id" : "qjK5HIQB8xpN1Xtdy25q",
        "_score" : 1.0,
        "_source" : {
          "key" : "中华人民共和国国旗"
        }
      }
    ]
  }
}

关键字搜索

通过关键字进行检索：

curl --cacert http_ca.crt -u elastic -XGET https://localhost:9200/test_record/_search?pretty -H 'Content-Type: application/json' -d '{"query":{"match":{"key":"国歌"}}}'

如果成功返回下面内容
{
  "took" : 82,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 1.3260206,
    "hits" : [
      {
        "_index" : "test_record",
        "_id" : "pzK5HIQB8xpN1XtdHm7Z",
        "_score" : 1.3260206,
        "_source" : {
          "key" : "中华人民共和国国歌",
          "date" : "2021-10-15T13:12:00",
          "counts" : 1
        }
      }
    ]
  }
}

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