index_prefixes

`index_prefixes`

index_prefixes 参数允许索引词的前缀以加速前缀搜索。它接受以下可选设置：

`min_chars`	要索引的最小前缀长度。必须大于 0，默认为 2。该值是包含的。
`max_chars`	要索引的最大前缀长度。必须小于 20，默认为 5。该值是包含的。

此示例使用默认的前缀长度设置创建一个文本字段

resp = client.indices.create(
    index="my-index-000001",
    mappings={
        "properties": {
            "body_text": {
                "type": "text",
                "index_prefixes": {}
            }
        }
    },
)
print(resp)

response = client.indices.create(
  index: 'my-index-000001',
  body: {
    mappings: {
      properties: {
        body_text: {
          type: 'text',
          index_prefixes: {}
        }
      }
    }
  }
)
puts response

const response = await client.indices.create({
  index: "my-index-000001",
  mappings: {
    properties: {
      body_text: {
        type: "text",
        index_prefixes: {},
      },
    },
  },
});
console.log(response);

PUT my-index-000001
{
  "mappings": {
    "properties": {
      "body_text": {
        "type": "text",
        "index_prefixes": { }    
      }
    }
  }
}

一个空的设置对象将使用默认的 min_chars 和 max_chars 设置

此示例使用自定义前缀长度设置

resp = client.indices.create(
    index="my-index-000001",
    mappings={
        "properties": {
            "full_name": {
                "type": "text",
                "index_prefixes": {
                    "min_chars": 1,
                    "max_chars": 10
                }
            }
        }
    },
)
print(resp)

response = client.indices.create(
  index: 'my-index-000001',
  body: {
    mappings: {
      properties: {
        full_name: {
          type: 'text',
          index_prefixes: {
            min_chars: 1,
            max_chars: 10
          }
        }
      }
    }
  }
)
puts response

const response = await client.indices.create({
  index: "my-index-000001",
  mappings: {
    properties: {
      full_name: {
        type: "text",
        index_prefixes: {
          min_chars: 1,
          max_chars: 10,
        },
      },
    },
  },
});
console.log(response);

PUT my-index-000001
{
  "mappings": {
    "properties": {
      "full_name": {
        "type": "text",
        "index_prefixes": {
          "min_chars" : 1,
          "max_chars" : 10
        }
      }
    }
  }
}

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