关于elasticsearch:elasticsearch进阶1-reindex

一、参考

elasticsearch 学习系列目录——更新 ing

二、示例

2.1 批改字段名称

批改字段名称，即先删除原来字段，赋值新字段

POST _reindex
{
  "source": {"index": "yztest"},
  "dest": {"index": "yztest1"},
  "script": {
    "lang": "painless", 
    "source": """
      for (item in params.updateFields){if (ctx._source.containsKey(item)){
          def newItem = "df_" + item;
          ctx['_source'][newItem] = ctx._source.remove(item);
        }
      }
    ""","params": {"updateFields": ["f1","f2"]
    }
  }
}