Count distinct on elastic search

Question

How to achieve count distinct function on elastic search type using sql4es driver?

Select distinct inv_number , count(1) from invoices;

But

Answer 1

This should work to count exact distinct values:

curl -X POST "localhost:9200/invoices/_search?size=0&pretty" -H 'Content-Type: application/json' -d '{
"aggs" : {
    "types_count" : {
      "value_count" : { "field" : "inv_number" }
    },
    "group_by_status": {
      "terms": {
        "field": "inv_number"
      }
    }
}

}'