The most effective way to check if an Elasticsearch document exists with the given values

Question

I want to check if there are any Elasticsearch documents that exist with specified values. Where is the fastest way to check because I just want to check for existence.
I am looking for implementation in java.

Answer 1

You're looking for a query in the filter context (see documentation), because Elasticsearch won't calculate the matching score and will cache the result. Using the query DSl, the query might look like:

{
  "query": {
    "bool": {
      "filter": {
        "the_field_name": "the_value_to_match"
      }
    }
  }
}

As for the Java API, you'll find your answer in the Elastic documentation: https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-compound-queries.html#java-query-dsl-bool-query