Remove a field from a Elasticsearch document

Question

I need to remove a field in all the documents indexed to Elasticsearch . How can i do it. Will any of the delete queries help me achieve this.

Answer 1

You can use _update_by_query

Example 1

index: my_index

field: user.email

POST my_index/_update_by_query?conflicts=proceed
{
    "script" : "ctx._source.user.remove('email')",
    "query" : {
        "exists": { "field": "user.email" }
    }
}

Example 2

index: my_index

field: total_items

POST my_index/_update_by_query?conflicts=proceed
{
    "script" : "ctx._source.remove('total_items')",
    "query" : {
        "exists": { "field": "total_items" }
    }
}