# Logstash CSV Filter Using Unicode delimiter ( SOH )

**URL:** <https://discuss.elastic.co/t/logstash-csv-filter-using-unicode-delimiter-soh/32517>\
**Category:** Logstash\
**Created:** [October 19, 2015, 6:32pm UTC](https://discuss.elastic.co/t/logstash-csv-filter-using-unicode-delimiter-soh/32517 "2015-10-19T18:32:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [October 19, 2015, 6:35pm UTC](https://discuss.elastic.co/t/logstash-csv-filter-using-unicode-delimiter-soh/32517/2 "2015-10-19T18:35:46Z")

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The [string type documentation](https://www.elastic.co/guide/en/logstash/current/configuration-file-structure.html#string) doesn't mention anything about this so one should assume escape sequences are unsupported. See related thread below:

> [@Ctrl A separated csv file elasticsearch not indexing using logstash](https://discuss.elastic.co/t/ctrl-a-separated-csv-file-elasticsearch-not-indexing-using-logstash/32077):
>
> 0 down vote favorite I am using the config: input { file { path =\> "/tmp/test12.csv" type =\> "Sample" start\_position =\> "beginning" } } filter { csv { columns =\> ["col1","col2,"col3","col4"] separator =\> '\u0001' } } output { elasticsearch { action =\> "index" host =\> "localhost" index =\> "t2" document\_id =\> "%{col1}" } } For separator using '\u0001' but its not working

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_[View the full topic](https://discuss.elastic.co/t/logstash-csv-filter-using-unicode-delimiter-soh/32517)._