# Iterate value by doc\_values

**URL:** <https://discuss.elastic.co/t/iterate-value-by-doc-values/136161>\
**Category:** Elasticsearch\
**Created:** [June 16, 2018, 6:14am UTC](https://discuss.elastic.co/t/iterate-value-by-doc-values/136161 "2018-06-16T06:14:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bobotu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bobotu/32/32335_2.png) [@bobotu](https://discuss.elastic.co/u/bobotu)\
**Post date:** [June 16, 2018, 6:14am UTC](https://discuss.elastic.co/t/iterate-value-by-doc-values/136161/1 "2018-06-16T06:14:29Z")

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I'm new to Elasticsearch. It seems like doc\_values is a columnar storage for documents fields. I want to do search in Spark and retrieve a few fields of a large mount of documents. It seems a columnar storage format will help more.  
But I don't know the `search API` or `ES-Hadoop` provide API to do this.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 14, 2018, 6:14am UTC](https://discuss.elastic.co/t/iterate-value-by-doc-values/136161/2 "2018-07-14T06:14:37Z")

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