Elasticsearch 映射 - 重命名现有字段

Question

我是否可以重命名现有 elasticsearch 映射中的元素而无需添加新元素？如果是这样，为了避免破坏现有映射，最好的方法是什么？

例如从 fieldCamelCase 到 fieldCamelCase

{
    "myType": {
        "properties": {
            "timestamp": {
                "type": "date",
                "format": "date_optional_time"
            },
            "fieldCamelcase": {
                "type": "string",
                "index": "not_analyzed"
            },
            "field_test": {
                "type": "double"
            }
        }
    }
}

Answer 1

您可以通过创建一个 Ingest 来做到这一点管道，包含 Rename Processor结合 Reindex API .

PUT _ingest/pipeline/my_rename_pipeline
{
  "description" : "describe pipeline",
  "processors" : [
    {
      "rename": {
        "field": "fieldCamelcase",
        "target_field": "fieldCamelCase"
      }
    }
  ]
}

POST _reindex
{
  "source": {
    "index": "source"
  },
  "dest": {
    "index": "dest",
    "pipeline": "my_rename_pipeline"
  }
} 

请注意，您需要运行 Elasticsearch 5.x 才能使用摄取。如果您正在运行 < 5.x，那么您将不得不使用他的评论中提到的@Val :)