ES 查詢語句

1.查詢總數，ES最大查詢傳回10000條，kibana查詢時添加 ?rest_total_hits_as_int

GET test/_search?rest_total_hits_as_int

{

"query": {

"match_all": {}

}

2.根據某一項的聚合：ElasticSearch Terms Aggregation

聚合查詢報錯：Fielddata is disabled on text fields by default. Set fielddata=true on [title] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.

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3.清空索引下所有資料

POST test/_delete_by_query

4. ES重複項目删除

POST ys_related_sv/_delete_by_query

"bool" : {

"must_not": [

"exists": {"field": "vid"}

]

注意：需要删除索引重建才能設定！！！

開啟Text的fielddata=true, 在ES中預設fielddata是false，因為開啟text的,注意：這樣會取消es的反向索引功能，并且很吃記憶體

5.es查詢不存在的字段

GET ys_related_sv/_search

"must": [

6.es查詢存在的字段