# Grok Match but not include

**URL:** <https://discuss.elastic.co/t/grok-match-but-not-include/303046>\
**Category:** Logstash\
**Created:** [April 22, 2022, 2:42pm UTC](https://discuss.elastic.co/t/grok-match-but-not-include/303046 "2022-04-22T14:42:33Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![sukur55](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sukur55/32/78687_2.png) [@sukur55](https://discuss.elastic.co/u/sukur55)\
**Post date:** [April 22, 2022, 2:42pm UTC](https://discuss.elastic.co/t/grok-match-but-not-include/303046/1 "2022-04-22T14:42:33Z")

</div>

Hello, I am trying to parse a custom date&time field like:  
` date=2022-04-22 time=09:38:04`,  
currently I have filter like:  
`(?<timestamp>%{YEAR}-%{MONTHNUM}-%{MONTHDAY} time=%{TIME})`  
and result of timestamp is:  
`2022-04-22 time=09:38:04` .  
I need to remove 'time=' from result, how I can achieve it?

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [April 22, 2022, 4:32pm UTC](https://discuss.elastic.co/t/grok-match-but-not-include/303046/2 "2022-04-22T16:32:41Z")

</div>

You could use

```
mutate { gsub => ["timestamp", "time=", ""] }
```

---

<div class="post-metadata">

**Author:** ![sukur55](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sukur55/32/78687_2.png) [@sukur55](https://discuss.elastic.co/u/sukur55)\
**Post date:** [April 25, 2022, 6:42am UTC](https://discuss.elastic.co/t/grok-match-but-not-include/303046/3 "2022-04-25T06:42:27Z")

</div>

thank you, it did the job

---

<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:** [May 23, 2022, 6:43am UTC](https://discuss.elastic.co/t/grok-match-but-not-include/303046/4 "2022-05-23T06:43:07Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.