ElasticSearch doc_values、index以及_source测试
https://www.jianshu.com/p/33cb5c9a6903
测试index、doc_values以及_source的作用
template
{ "order": 0, "index_patterns": [ "baiyxtest*" ], "settings": { "index": { "number_of_shards": "2", "number_of_replicas": "1" } }, "mappings": { "_source": { "enabled": false }, "properties": { "aggable": { "index": "false", "type": "keyword", "doc_values": true }, "value": { "type": "long", "doc_values": false }, "searchable": { "type": "keyword", "doc_values": false } } }, "aliases": {} }
1、测试index为false的字段作为检索条件
{ "query": { "match": { "aggable": "aaa" } } }
字段如果设置为index 如果设置为false,那么外部就不能使用query或者trem进行查询了,如果进行查询就会报错
"reason": "Cannot search on field [aggable] since it is not indexed."
2、测试index为true的字段作为检索条件
{ "query": { "match": { "searchable": "bbb" } } }
可以查得出来,但是设置了"_source":"false",所以看不到具体文档,"_source"字段存储了各个字段value组成的一个字符串,不清楚网上去搜索,query或者term查询的时候默认查询的就是"_source"的值。
{ "took": 7, "timed_out": false, "_shards": { "total": 2, "successful": 2, "skipped": 0, "failed": 0 }, "hits": { "total": { "value": 1, "relation": "eq" }, "max_score": 0.2876821, "hits": [{ "_index": "baiyxtest", "_type": "_doc", "_id": "1gno53ABNKWqmzmcZdA_", "_score": 0.2876821 }] } }
3、测试doc_values为false的字段做聚合维度字段
doc_values主要是用来做数据的聚合、排序等操作的
{ "query": { "match": { "searchable": "bbb" } }, "aggregations": { "group_by_aggable": { "terms": { "field": "searchable" }, "aggregations": { "value": { "sum": { "field": "value" } } } } } }
报错
"reason": "Can't load fielddata on [value] because fielddata is unsupported on fields of type [long]. Use doc values instead."
5、修改mapping,去掉value字段的doc_values(默认值true)
{ "order": 0, "index_patterns": [ "baiyxtest*" ], "settings": { "index": { "number_of_shards": "2", "number_of_replicas": "1" } }, "mappings": { "_source": { "enabled": false }, "properties": { "aggable": { "index": "false", "type": "keyword", "doc_values": true }, "value": { "type": "long" }, "searchable": { "type": "keyword", "doc_values": false } } }, "aliases": {} }
posted on 2020-10-10 09:23 luzhouxiaoshuai 阅读(479) 评论(0) 编辑 收藏 举报