# Elasticsearch - field datatypes

**URL:** <https://discuss.elastic.co/t/elasticsearch-field-datatypes/91037>\
**Category:** Elasticsearch\
**Created:** [June 28, 2017, 2:12am UTC](https://discuss.elastic.co/t/elasticsearch-field-datatypes/91037 "2017-06-28T02:12:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![alexus](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alexus/32/12696_2.png) [@alexus](https://discuss.elastic.co/u/alexus)\
**Post date:** [June 28, 2017, 2:12am UTC](https://discuss.elastic.co/t/elasticsearch-field-datatypes/91037/1 "2017-06-28T02:12:18Z")

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I'm reading [Field datatypes | Elasticsearch Reference [master] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/master/mapping-types.html) and trying to understand what would be best fit for check sum field? like sha1 for example?

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**Author:** ![prarabdh9909](https://avatars.discourse-cdn.com/v4/letter/p/49beb7/32.png) [@prarabdh9909](https://discuss.elastic.co/u/prarabdh9909)\
**Post date:** [June 28, 2017, 3:21am UTC](https://discuss.elastic.co/t/elasticsearch-field-datatypes/91037/2 "2017-06-28T03:21:33Z")

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I would use "keyword" type.

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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 26, 2017, 3:21am UTC](https://discuss.elastic.co/t/elasticsearch-field-datatypes/91037/3 "2017-07-26T03:21:37Z")

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Closed on July 26, 2017, 3:21am UTC

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