# How to apply mutate split on dynamic fields
**URL:** https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882
**Category:** Logstash
**Created:** [September 10, 2018, 5:13am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882 "2018-09-10T05:13:42Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@prakhara](https://discuss.elastic.co/u/prakhara)
#### Post date: [September 10, 2018, 5:13am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/1 "2018-09-10T05:13:42Z")
How can I apply mutate split on dynamic fields
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [September 10, 2018, 6:00am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/2 "2018-09-10T06:00:44Z")
I don't want to risk wasting time guessing what you mean so please elaborate. Giving an example is often a useful way of avoiding ambiguity and getting a good answer.
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### Author:  [@prakhara](https://discuss.elastic.co/u/prakhara)
#### Post date: [September 10, 2018, 6:07am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/3 "2018-09-10T06:07:27Z")
actually I have last log field as dynamic company\_concept\_ss=Asia,India,Ceo|location\_concept\_ss=Asia,India|general\_concept\_ss=India,Ceo,pay
all these fields are dynamic i.e the name and count of the fields can vary
and I want output
"company\_concept\_ss" =\> [
[0] "Asia",
[1] "India",
[2] "ceo"
]
and so on
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [September 10, 2018, 6:39am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/4 "2018-09-10T06:39:28Z")
Okay. You'll have to use a ruby filter to loop over the possible field names and call (the Ruby) split function on the string values in the fields.
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### Author:  [@prakhara](https://discuss.elastic.co/u/prakhara)
#### Post date: [September 10, 2018, 6:48am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/5 "2018-09-10T06:48:21Z")
can you show me the example or a link to that, I am not familiar with ruby
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [September 10, 2018, 6:50am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/6 "2018-09-10T06:50:09Z")
There are lots of similar examples in the archives of this forum. I don't have time to dig up one in particular.
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### Author:  [@prakhara](https://discuss.elastic.co/u/prakhara)
#### Post date: [September 10, 2018, 11:56am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/7 "2018-09-10T11:56:09Z")
I can't find one .Please help whenever you have time today or tomorrow
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 8, 2018, 11:56am UTC](https://discuss.elastic.co/t/how-to-apply-mutate-split-on-dynamic-fields/147882/8 "2018-10-08T11:56:17Z")
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