# Mutate split not working as expected

**URL:** <https://discuss.elastic.co/t/mutate-split-not-working-as-expected/177710>\
**Category:** Logstash\
**Created:** [April 20, 2019, 10:38am UTC](https://discuss.elastic.co/t/mutate-split-not-working-as-expected/177710 "2019-04-20T10:38:20Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Srikanth\_Reddy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/srikanth_reddy/32/44489_2.png) [@Srikanth\_Reddy](https://discuss.elastic.co/u/Srikanth_Reddy)\
**Post date:** [April 20, 2019, 10:38am UTC](https://discuss.elastic.co/t/mutate-split-not-working-as-expected/177710/1 "2019-04-20T10:38:21Z")

</div>

Hi,  
I am trying to split message by new new line  
mutate {  
copy =\> { "message" =\> "message\_val" }  
}

mutate {  
split =\> { "message\_val" =\> "\n" }  
add\_field =\> { "fullQuery" =\> "%{message\_val[4]}" }  
}

the output is coming like  
%{message\_val[4]}

Is there anything i am missing here?

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<div class="post-metadata">

**Author:** ![Srikanth\_Reddy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/srikanth_reddy/32/44489_2.png) [@Srikanth\_Reddy](https://discuss.elastic.co/u/Srikanth_Reddy)\
**Post date:** [April 20, 2019, 11:17am UTC](https://discuss.elastic.co/t/mutate-split-not-working-as-expected/177710/2 "2019-04-20T11:17:35Z")

</div>

i solved this with multiple gsub replacements

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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:** [May 18, 2019, 11:17am UTC](https://discuss.elastic.co/t/mutate-split-not-working-as-expected/177710/3 "2019-05-18T11:17:35Z")

</div>

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