Compound queries wrap other compound or leaf queries, either to combine their results and scores, to change their behaviour, or to switch from query to filter context. 
复合查询包装其他复合查询或叶查询，以组合其结果和分数，更改其行为，或从查询切换到筛选上下文。 
改组中的查询如下 
-constant_score query 
A query which wraps another query, but executes it in filter context. All matching documents are given the same “constant” _score. 
一个包含另一个查询的查询，但在Filtercontext中执行它。所有匹配的文档都被赋予相同的“常量”分数。

GET /_search
{ "query": { "constant_score" : { "filter" : { "term" : { "user" : "kimchy"}
            }, "boost" : 1.2 }
    }
}
Filter clauses are executed in filter context, meaning that scoring is ignored and clauses are considered for caching.
Filter子句在Filter体中执行，意味着忽略评分，考虑子句缓存；

	
	

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-bool query 
The default query for combining multiple leaf or compound query clauses, as must, should, must_not, or filter clauses. The must and should clauses have their scores combined — the more matching clauses, the better — while the must_not and filter clauses are executed in filter context.

组合多叶或者复合查询子句的缺省查询，例如must，should, must_not, or过滤子句。must子句和should子句他们的分数合并，匹配子句越多。当，must_not和filter子句在filter体中执行效果最好

boolQuery()
        .must(termQuery("content", "test1"))                 
        .must(termQuery("content", "test4"))                 
        .mustNot(termQuery("content", "test2"))              
        .should(termQuery("content", "test3"))               
        .filter(termQuery("content", "test5"));   //a query that must appear in the matching documents but doesn’t contribute to scoring.

	
	

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-dis_max query 
A query which accepts multiple queries, and returns any documents which match any of the query clauses. While the bool query combines the scores from all matching queries, the dis_max query uses the score of the single best- matching query clause. 
一个接受多个查询的查询，并返回任何匹配查询的文档。当bool查询合并所有匹配查询的分数时，dis_max查询使用单个最佳匹配查询子句的得分。

disMaxQuery()
        .add(termQuery("name", "kimchy"))                    
        .add(termQuery("name", "elasticsearch"))             
        .boost(1.2f)          //boost factor  升压因子                               
        .tieBreaker(0.7f);   //tie breaker

	
	

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-function_score query 
Modify the scores returned by the main query with functions to take into account factors like popularity, recency, distance, or custom algorithms implemented with scripting. 
使用函数修改主查询返回的分数，以考虑受欢迎、最近、距离或用脚本实现的自定义算法等因素。 
-boosting query 
Return documents which match a positive query, but reduce the score of documents which also match a negative query. 
回与正查询匹配的文档，但减少与否定查询匹配的文档得分。

boostingQuery(
            termQuery("name","kimchy"),            //query that will promote documents 提升文档查询          
            termQuery("name","dadoonet"))        //query that will demote documents 降级文档的查询            
        .negativeBoost(0.2f);   //  negative boost 负升压