弹性搜索通配符查询不区分大小写（小写）

Question

我正在尝试使用通配符查询从 elasticsearch 中获取记录。

请查找以下查询

get my_index12/_search
{ 
  "query": { 
  "wildcard": { 
  "code.keyword": { 
          "value": "*ARG*" 
        } 
    } 
  } 
}

它正在运行并为上述查询提供预期结果。但它不适用于小写值。

get my_index12/_search
{ 
  "query": { 
  "wildcard": { 
  "code.keyword": { 
          "value": "*Arg*" 
        } 
    } 
  } 
}

Answer 1

您必须规范化关键字字段：

ElasticSearch normalizer

类似于（来自文档）：

PUT index
 {
  "settings": {
    "analysis": {
    "normalizer": {
       "my_normalizer": {
       "type": "custom",
       "char_filter": [],
       "filter": ["lowercase", "asciifolding"]
     }
   }
 }
},
"mappings": {
  "_doc": {
    "properties": {
      "foo": {
        "type": "keyword",
        "normalizer": "my_normalizer"
      }
    }
   }
  }
}

更新一些附加信息：

Only parts of the analysis chain that operate at the character level are applied. So for instance, if the analyzer performs both lowercasing and stemming, only the lowercasing will be applied: it would be wrong to perform stemming on a word that is missing some of its letters.

By setting analyze_wildcard to true, queries that end with a * will be analyzed and a boolean query will be built out of the different tokens, by ensuring exact matches on the first N-1 tokens, and prefix match on the last token.

Answer 2

尝试以下操作：

映射：

PUT my_index12
{
"settings": {
"analysis": {
  "analyzer": {
    "custom_analyzer": {
      "type": "custom",
      "tokenizer": "whitespace",
      "char_filter": [
        "html_strip"
      ],
      "filter": [
        "lowercase",
        "asciifolding"
      ]
    }
   }
  }
},
"mappings": {
"doc": {
  "properties": {
    "code": {
      "type": "text",
       "analyzer": "custom_analyzer"
      }
    }
  }
 }
}

然后运行Query String查询

GET my_index12/_search
{
"query": {
"query_string": {
  "default_field": "code",
  "query": "AB\-7000*"
    }
  }
}

它也适用于 ab-7000*

让我知道它是否适合你。

弹性搜索通配符查询不区分大小写（小写）

Elastic Search wildcard query not working with case insensitive ( for lower case)

java

elasticsearch

kibana

elastic-stack