CODEWITHSUNDEEP
elasticsearchelasticsearch-5
user1189332
user1189332

Reputation: 1941

Elasticsearch | Use of "docvalue_field" in a search query

Going through this documentation:

https://www.elastic.co/guide/en/elasticsearch/reference/master/search-request-docvalue-fields.html

I'm trying to find out a real use case as why one would need the docvalue_field as part of the query? Already these are part of the source and can it not be achieved by means of source filtering ("_source": ....) if we're interested in specific fields?

Upvotes: 1

Views: 2518

Answers (1)

shusson
shusson

Reputation: 5782

Performance when querying nested documents is significantly affected by whether you enable _source. https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-inner-hits.html#nested-inner-hits-source

Upvotes: 1

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