# What's side-effects about property 'es.read.field.include'? **URL:** \ **Category:** Elasticsearch\ **Tags:** es-hadoop\ **Created:** [June 16, 2017, 10:45am UTC](https://discuss.elastic.co/t/whats-side-effects-about-property-es-read-field-include/89689 "2017-06-16T10:45:02Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![wangqinghuan](https://avatars.discourse-cdn.com/v4/letter/w/d26b3c/32.png) [@wangqinghuan](https://discuss.elastic.co/u/wangqinghuan)\ **Post date:** [June 16, 2017, 10:45am UTC](https://discuss.elastic.co/t/whats-side-effects-about-property-es-read-field-include/89689/1 "2017-06-16T10:45:02Z")
hi This is a document about es for hadoop's coniguration. [https://www.elastic.co/guide/en/elasticsearch/hadoop/current/configuration.html](https://www.elastic.co/guide/en/elasticsearch/hadoop/current/configuration.html) It only tells me that property 'es.read.field.include' can have some side-effects .Has anyone tells me what's the side-effects? ---
**Author:** ![james.baiera](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/james.baiera/32/10209_2.png) [@james.baiera](https://discuss.elastic.co/u/james.baiera)\ **Post date:** [June 20, 2017, 6:50pm UTC](https://discuss.elastic.co/t/whats-side-effects-about-property-es-read-field-include/89689/2 "2017-06-20T18:50:33Z")
`es.read.field.include` only impacts two things at the moment: 1) filtering of array values returned with the document source, and 2) used to determine array depth for Spark SQL's schema conversion code. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 18, 2017, 6:50pm UTC](https://discuss.elastic.co/t/whats-side-effects-about-property-es-read-field-include/89689/3 "2017-07-18T18:50:53Z")
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