弹性搜索 - 从not_analyzed转换为分析 [英] Elasticsearch - change field from not_analyzed to analyzed

问题描述

是否可以将现有字段的属性从 not_analyzed 修改为分析？

Is it possible to modify property of an existing field from not_analyzed to analyzed ?

如果没有，我可以做什么来保存我的所有文件？

If not, what can I do in order to keep all my documents in store ?

我无法删除映射（因为所有的文档

I cannot delete mappings (because then all documents will be gone) and I need that old field as analyzed.

推荐答案

您不能修改现有的字段，但是您也可以创建另一个字段或添加一个子字段到您的 not_analyzed 字段。

You cannot modify an existing field, however, you can either create another field or add a sub-field to your not_analyzed field.

我将要处理后一种解决方案。首先，在现有的字段中添加一个新的子字段，如下所示：

I'm going for the latter solution. So first, add a new sub-field to your existing field, like this:

curl -XPUT localhost:9200/index/_mapping/type -d '{
    "properties": {
        "your_field": {
            "type": "string",
            "index": "not_analyzed",
            "fields": {
                "sub": {
                    "type": "string"
                }
            }
        }
    }
}'

以上，我们添加了一个名为 your_field.sub （被分析）到现有的 your_field （这是 not_analyzed ）

Above, we've added the sub-field called your_field.sub (which is analyzed) to the existing your_field (which is not_analyzed)

接下来，我们需要填写新的子字段。如果您运行的是最新的ES 2.3，您可以使用强大的 Reindex API

Next, we'll need to populate that new sub-field. If you're running the latest ES 2.3, you can use the powerful Reindex API

curl -XPUT localhost:9200/_reindex -d '{
  "source": {
    "index": "index"
  },
  "dest": {
    "index": "index"
  },
  "script": {
    "inline": "ctx._source.your_field = ctx._source.your_field"
  }
}'

否则，您只需使用以下Logstash配置即可重新建立数据索引，以填充新的子字段

Otherwise, you can simply use the following Logstash configuration which will re-index your data in order to populate the new sub-field

input {
  elasticsearch {
   hosts => "localhost:9200"
   index => "index"
   docinfo => true
  }
}
filter {
 mutate {
  remove_field => [ "@version", "@timestamp" ]
 }
}
output {
 elasticsearch {
   hosts => ["localhost:9200"]
   manage_template => false
   index => "%{[@metadata][_index]}"
   document_type => "%{[@metadata][_type]}"
   document_id => "%{[@metadata][_id]}"
 }
}

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