Does elasticsearch consider empty string as null?

Question

I would like to know if elasticsearch considers empty string as null value, but based on my mapping shown below, I don't see that it is doing that. How can I make elasticsearch consider empty string as a null and index using the value provided by null_value. My mapping is shown below:

{
    "mapping": {
        "my_typee": {
            "properties": {
                "autoRank": {
                    "type": "integer",
                    "null_value": 0,
                    "store": true,
                    "index": "analyzed"
                }
            }
        }
    }
}

Thanks in advance.

alpert · Accepted Answer · 2020-12-04 08:16:28Z

1

Elasticsearch does not index empty strings. In your case your field is actually not string but an integer of type. And null_value option is actually does what you want to do. You dont need to do anything extra.

https://www.elastic.co/guide/en/elasticsearch/reference/current/null-value.html

edited Dec 4, 2020 at 8:16

answered Apr 26, 2016 at 8:14

alpert

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