Hi,

Elasticsearch comes with a lot of features. You can easily update only specific field value in elasticsearch by the following query:

POST /index/type/D001/_update
{
    "doc" : {
        "updated" : "Y"
    }
}

Above code will add a new field updated in the document. If it is already present the value will be updated to "Y".

This query you can use of update multiple fields also at a time. Actually Elasticsearch runs the update on the existing document and merges the new data with the existing data. If the field is present it will update the data and if the field is not already present then it will create in the document.

Hope this helps you.

Thanks