ElasticSearch：为什么 query_string 不区分大小写而通配符区分大小写？

Question

为什么当您对不区分大小写的字段执行 query_string 查询而通配符查询区分大小写时？我本以为两者的行为会相似。

这个query_string查询returns结果

{
  "query": {
    "bool" : {
      "must" : [ {
        "query_string" : {
          "query" : "name:*HILTON*"
        }
      } ]
    }
  }
}

因为这个通配符查询没有

{
  "query": {
    "bool" : {
      "must" : [{
        "wildcard" : {
          "name" : "*HILTON*"
        }
      } ]
    }
  }
}

Answer 1

这是因为 Wild card query 适用于 not analyzed 个字段。

根据文档：

The prefix, wildcard, and regexp queries operate on terms. If you use them to query an analyzed field, they will examine each term in the field, not the field as a whole.

Wild card query matches documents that have fields matching a wildcard expression (not analyzed).

ElasticSearch：为什么 query_string 不区分大小写而通配符区分大小写？

ElasticSearch: why is query_string case insensitive and wildcard case sensitive?

wildcard

request

elasticsearch