Reindex Elasticsearch Data With Script

es-reindex-with-script.md

How to reindex data and using inline (painless) script

PUT /data/logs/1
{
  "title": "This is a document",
  "one": 1,
  "two": 2
}

DELETE /new_data/_search

GET /new_data/_search

POST /_reindex
{
  "source": {
    "index": "data"
  },
  "dest": {
    "index": "new_data"
  },
  "script": {
    "lang": "painless",
    "inline": "ctx._source.three = ctx._source.one + ctx._source.two"
  }
}

GET /new_data/logs/1

Elasticsearch Response

{
  "_index": "new_data",
  "_type": "logs",
  "_id": "1",
  "_version": 2,
  "found": true,
  "_source": {
    "one": 1,
    "title": "This is a document",
    "two": 2,
    "three": 3
  }
}