elastic_tutorial/The Elasticsearch Documentation/5_script-Medium/4_vars.es

POST my-index/_update/1
{
    "script": {
        "source": "String newVar = 'HI!'; ctx._source.message = newVar",
        "lang": "painless",
        "params": {
            "tag": "blue"
        }
    }
}
// تعریف متغیر newVar به صورت String و مقدار HI!

Get my-index/_doc/1/_source