# Logstack creación de variables

**URL:** <https://discuss.elastic.co/t/logstack-creacion-de-variables/337793>\
**Category:** Elastic en Español\
**Created:** [July 6, 2023, 11:53am UTC](https://discuss.elastic.co/t/logstack-creacion-de-variables/337793 "2023-07-06T11:53:36Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![JorgeGV](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@JorgeGV](https://discuss.elastic.co/u/JorgeGV)\
**Post date:** [July 6, 2023, 11:53am UTC](https://discuss.elastic.co/t/logstack-creacion-de-variables/337793/1 "2023-07-06T11:53:36Z")

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Se pueden realizar operaciones en logstack?  
Necesito crear una nueva variable que es comparación entre dos fechas, es posible eso?  
Gracias

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**Author:** ![jsanz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jsanz/32/53734_2.png) [@jsanz](https://discuss.elastic.co/u/jsanz)\
**Post date:** [July 6, 2023, 1:01pm UTC](https://discuss.elastic.co/t/logstack-creacion-de-variables/337793/2 "2023-07-06T13:01:21Z")

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Echa un vistazo al filtro ` mutate` que te permite añadir nuevos campos a tus documentos

> **[Mutate filter plugin | Logstash Reference \[8.8\] | Elastic](https://www.elastic.co/guide/en/logstash/current/plugins-filters-mutate.html)**

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<div class="post-metadata">

**Author:** ![JorgeGV](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@JorgeGV](https://discuss.elastic.co/u/JorgeGV)\
**Post date:** [July 7, 2023, 8:37am UTC](https://discuss.elastic.co/t/logstack-creacion-de-variables/337793/3 "2023-07-07T08:37:29Z")

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Y permite realizar operaciones con las variables?  
Gracias por la respuesta  
Saludos

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<div class="post-metadata">

**Author:** ![jsanz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jsanz/32/53734_2.png) [@jsanz](https://discuss.elastic.co/u/jsanz)\
**Post date:** [July 7, 2023, 10:23am UTC](https://discuss.elastic.co/t/logstack-creacion-de-variables/337793/4 "2023-07-07T10:23:09Z")

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Permite hacer las operaciones de la documentación que enlacé.

Si quieres hacer otras cosas puedes consultar la documentación del resto de filtros

> **[Filter plugins | Logstash Reference \[8.8\] | Elastic](https://www.elastic.co/guide/en/logstash/current/filter-plugins.html)**

Tal vez te interese el filtro que permite ejecutar scripts

> **[Ruby filter plugin | Logstash Reference \[8.8\] | Elastic](https://www.elastic.co/guide/en/logstash/current/plugins-filters-ruby.html)**

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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:** [August 4, 2023, 10:23am UTC](https://discuss.elastic.co/t/logstack-creacion-de-variables/337793/5 "2023-08-04T10:23:39Z")

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