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14.记录------_all字段和date字段查询
官文上介绍了_all查询和date字段查询的不同,自己实践进行了解.
首先head显示,两个索引的结果显示.
实例查询
参数:_search?q=2018
curl -XGET http://172.16.150.149:29200/twitter,facebook/_search?q=2018
{"took":1,"timed_out":false,"_shards":
{"total":4,"successful":4,"failed":0},
"hits":
{"total":6,"max_score":0.4375,"hits":
[{"_index":"twitter","_type":"big","_id":"777","_score":0.4375,"_source":{"title":"bigweb","text":"nothing","d":"2018/10/18"}},
{"_index":"twitter","_type":"blog","_id":"777","_score":0.4375,"_source":{"title":"bigweb","text":"nothing","d":"2018/10/18"}},
...
直接用q=2018是属于_all字段查询(参考官文)
hits-totle:6显示完全.
参数:_search?q=date:2018
curl -XGET http://172.16.150.149:29200/twitter,facebook/_search?q=date:2018
{"took":1,"timed_out":false,"_shards":{"total":4,"successful":4,"failed":0},"hits":{"total":4,"max_score":0.625,"hits":
[{"_index":"facebook","_type":"blog","_id":"AWZ67I_dHFL4sAFl7IMJ","_score":0.625,"_source":{"title":"website","text":"blog is making","date":"2018/1016"}},
{"_index":"facebook","_type":"blog","_id":"pretty","_score":0.37158427,"_source":{"title":"website","text":"blog is making","date":"2018/1016"}},
...
hits-totle:4显示部分.
开始以为date参数问题,重新测试_search?q=d:2018(因为也存在d字段)
curl -XGET http://172.16.150.149:29200/twitter,facebook/_search?q=d:2018
{"took":1,"timed_out":false,"_shards":{"total":4,"successful":4,"failed":0},"hits":{"total":0,"max_score":null,"hits":[]}}
hits-totle:4且没有显示详情了.
看来这个参数不是默认查询的字段.资料
如果输入新的字段类型就动态映射猜测字段类型.
es的搜索逻辑是分析再inverse index,有空继续研究.