Create Elasticsearch curl query for not null and not empty(“”)

Question

How can i create Elasticsearch curl query to get the field value which are not null and not empty(\"\"),

Here is the mysql query:

select field1 from          


        

Answer 1

On elasticsearch 5.6, I have to use command below to filter out empty string:

    GET /_search
    {
        "query" : {
            "regexp":{
                "": ".+"
            }
        }
    }