# Elasticsearch | Use of "docvalue\_field" in a search query

**URL:** <https://discuss.elastic.co/t/elasticsearch-use-of-docvalue-field-in-a-search-query/138249>\
**Category:** Elasticsearch\
**Created:** [July 2, 2018, 6:23pm UTC](https://discuss.elastic.co/t/elasticsearch-use-of-docvalue-field-in-a-search-query/138249 "2018-07-02T18:23:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Saiprasad\_Krishnamur](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/saiprasad_krishnamur/32/32290_2.png) [@Saiprasad\_Krishnamur](https://discuss.elastic.co/u/Saiprasad_Krishnamur)\
**Post date:** [July 2, 2018, 6:23pm UTC](https://discuss.elastic.co/t/elasticsearch-use-of-docvalue-field-in-a-search-query/138249/1 "2018-07-02T18:23:25Z")

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Going through this documentation:

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

> <https://stackoverflow.com/questions/51141803/elasticsearch-use-of-docvalue-field-in-a-search-query>

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 30, 2018, 6:23pm UTC](https://discuss.elastic.co/t/elasticsearch-use-of-docvalue-field-in-a-search-query/138249/2 "2018-07-30T18:23:26Z")

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