query_string 和 multi_match 有什么区别?

问题描述

运行此查询时:

{
  "query_string" : {
    "query" : "text",
    "fields": ["field1", "field2"]
  }
}

-

{
  "multi_match" : {
    "query" : "text",
    "fields": ["field1", "field2"]
  }
}

有什么区别?什么时候用一个，什么时候用另一个?

What is the difference? When to use one and when to use the other?

推荐答案

query_string 支持 Lucene 语法来解释文本，其中 multi_match 只是尝试将给定的 "text" 与列出的字段的索引值.

query_string supports Lucene syntax to interpret the text, where as multi_match just attempts to match the given "text" against the listed fields' indexed values.

因此查询字符串的功能要强大得多，但它也可能导致意想不到的情况，例如 / 可能导致部分字符串被解释为正则表达式.

Query string is therefore far more powerful, but it can also lead to unexpected scenarios, such as where / may cause part of the string to be interpreted as a regular expression.

DrTech 在在这个答案中展示了这两个方面做得非常出色.

DrTech does a pretty excellent job demonstrating the two over in this answer.

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