# Add Runtime Field By UpdateQueryAsync

**URL:** <https://discuss.elastic.co/t/add-runtime-field-by-updatequeryasync/312532>\
**Category:** Elasticsearch\
**Created:** [August 21, 2022, 1:33am UTC](https://discuss.elastic.co/t/add-runtime-field-by-updatequeryasync/312532 "2022-08-21T01:33:13Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rahma\_Boughale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rahma_boughale/32/99235_2.png) [@Rahma\_Boughale](https://discuss.elastic.co/u/Rahma_Boughale)\
**Post date:** [August 21, 2022, 1:33am UTC](https://discuss.elastic.co/t/add-runtime-field-by-updatequeryasync/312532/1 "2022-08-21T01:33:13Z")

</div>

Hello all, i am new to elasticsearch, i am trying to add a new field(runtime field) by `UpdateByQueryAsync` in my index(it already created), i did some research and i saw that we can add a new fiel by this syntax :

```auto
var updateByQueryResponse = await client.UpdateByQueryAsync<Document>(u => u
            .Query(q => q.MatchAll())
            .Script("ctx._source.isActive = true")
            .Refresh());

```

but in this case **isActive** will be indexed and for my case i want it to be an **runtime field** any suggestions please

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<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [August 21, 2022, 10:37am UTC](https://discuss.elastic.co/t/add-runtime-field-by-updatequeryasync/312532/2 "2022-08-21T10:37:45Z")

</div>

Update by query updates documents just as you stated. Runtime fields are [defined in mappings](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/runtime-mapping-fields.html) and processed at query time. You can not add runtime fields through update by query.

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<div class="post-metadata">

**Author:** ![Rahma\_Boughale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rahma_boughale/32/99235_2.png) [@Rahma\_Boughale](https://discuss.elastic.co/u/Rahma_Boughale)\
**Post date:** [August 21, 2022, 12:19pm UTC](https://discuss.elastic.co/t/add-runtime-field-by-updatequeryasync/312532/3 "2022-08-21T12:19:45Z")

</div>

thank you sir

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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:** [September 18, 2022, 12:20pm UTC](https://discuss.elastic.co/t/add-runtime-field-by-updatequeryasync/312532/4 "2022-09-18T12:20:21Z")

</div>

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