# Runtime fields on opensearch

**URL:** <https://forum.opensearch.org/t/runtime-fields-on-opensearch/9837>\
**Category:** Open Source Elasticsearch and Kibana\
**Tags:** feature-request\
**Created:** [June 6, 2022, 2:11pm UTC](https://forum.opensearch.org/t/runtime-fields-on-opensearch/9837 "2022-06-06T14:11:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![devarpisheth](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.opensearch.org/devarpisheth/32/3388_2.png) [@devarpisheth](https://forum.opensearch.org/u/devarpisheth)\
**Post date:** [June 6, 2022, 2:11pm UTC](https://forum.opensearch.org/t/runtime-fields-on-opensearch/9837/1 "2022-06-06T14:11:59Z")

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We need to run painless scripts on main document on opensearch. It’s part of 7.17.4

Runtime field allows that from elastic

> **[Map a runtime field | Elasticsearch Guide \[8.4\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/runtime-mapping-fields.html?baymax=rec&rogue=rec-1&elektra=guide)**

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**Author:** ![reta](https://avatars.discourse-cdn.com/v4/letter/r/cdc98d/32.png) [@reta](https://forum.opensearch.org/u/reta)\
**Post date:** [June 6, 2022, 2:26pm UTC](https://forum.opensearch.org/t/runtime-fields-on-opensearch/9837/2 "2022-06-06T14:26:59Z")

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Hey @devarpisheth ,

At the moment, Opensearch does not provide runtime fields or equivalent functionality. There is an issue open to have it implemented. [1].

[1] [[RFC] Schema on Reads · Issue #1133 · opensearch-project/OpenSearch · GitHub](https://github.com/opensearch-project/OpenSearch/issues/1133)

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**Author:** ![rishabhmaurya](https://avatars.discourse-cdn.com/v4/letter/r/f08c70/32.png) [@rishabhmaurya](https://forum.opensearch.org/u/rishabhmaurya)\
**Post date:** [June 28, 2024, 2:54pm UTC](https://forum.opensearch.org/t/runtime-fields-on-opensearch/9837/3 "2024-06-28T14:54:00Z")

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@devarpisheth check Derived Fields feature in latest release - [Derived - OpenSearch Documentation](https://opensearch.org/docs/latest/field-types/supported-field-types/derived/)