POST /message/_doc 
{ 
    "settings" : { 
        "analysis" : { 
            "analyzer" : { 
                "ik" : { 
                    "tokenizer" : "ik_max_word" 
                } 
            } 
        } 
    }, 
    "mappings" : { 
        "dynamic" : true, 
        "properties" : { 
            "chat_session_id" : { 
                "type" : "keyword", 
                "analyzer" : "standard" 
            }, 
            "message_id" : { 
                "type" : "keyword", 
                "analyzer" : "standard" 
            }, 
            "content" : { 
              "type" : "text", 
                "analyzer" : "ik_max_word" 
            } 
        } 
    } 
} 


GET /message/_doc/_search?pretty 
{ 
    "query": { 
        "match_all": {} 
    } 
}


POST /message/_doc/_bulk
{"index":{"_id":"1"}}
{"chat_session_id" : "会话ID1","message_id" : "消息ID1","content" : "吃饭了么？"}
{"index":{"_id":"2"}}
{"chat_session_id" : "会话ID1","message_id" : "消息ID2","content" : "吃的盖浇饭。"}
{"index":{"_id":"3"}}
{"chat_session_id" : "会话ID2","message_id" : "消息ID3","content" : "昨天吃饭了么？"}
{"index":{"_id":"4"}}
{"chat_session_id" : "会话ID2","message_id" : "消息ID4","content" : "昨天吃的盖浇饭。"}


GET /message/_doc/_search?pretty 
{
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "chat_session_id.keyword": "会话ID1"
          }
        },
        {
          "match": {
            "content": "盖浇饭"
          }
        }
      ]
    }
  }
}


DELETE /message