Elasticsearch MUST 和 SHOULD bool 查询的区别 [英] Elasticsearch difference between MUST and SHOULD bool query

问题描述

MUST 和 SHOULD 在 ES 中的 bool 查询有什么区别?

What is the difference between MUST and SHOULD bool query in ES?

如果我仅想要包含我的术语的结果，我应该使用 must 吗?

If I ONLY want results that contain my terms should I then use must ?

我有一个查询应该只包含某些值，并且没有日期/时间戳比今天的时间/日期更低的结果 - 现在

I have a query that should only contain certain values, and also no results that has a lower date/timestamp than todays time/date - NOW

还有

我可以像下面的代码一样在一个 must 中使用多个过滤器吗:

Can i use multiple filters inside a must like the code bellow:

"filtered": {
"filter": {
"bool" : {
        "must" : {
            "term" : { "type" : 1 }
            "term" : { "totals" : 14 }
            "term" : { "groupId" : 3 }
            "range" : {
                "expires" : {
                    "gte": "now"
                }
            }
        },

推荐答案

must 表示:子句(查询)必须出现在匹配的文档中.这些子句必须匹配，例如逻辑AND.

must means: The clause (query) must appear in matching documents. These clauses must match, like logical AND.

应该的意思是:这些子句中至少有一个必须匹配，比如逻辑OR.

should means: At least one of these clauses must match, like logical OR.

基本上它们像逻辑运算符 AND 和 OR 一样使用.请参阅这个.

Basically they are used like logical operators AND and OR. See this.

现在在 布尔查询:

must 表示:must 匹配要包含的文档的子句.

must means: Clauses that must match for the document to be included.

should 表示:如果这些子句匹配，则增加_score；否则，它们不起作用.它们只是用来细化每个文档的相关性分数.

should means: If these clauses match, they increase the _score; otherwise, they have no effect. They are simply used to refine the relevance score for each document.

是的，您可以在 must 中使用多个过滤器.

Yes you can use multiple filters inside must.

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