# Issue with regex pattern for prune filter plugin blacklist\_names

**URL:** <https://discuss.elastic.co/t/issue-with-regex-pattern-for-prune-filter-plugin-blacklist-names/191834>\
**Category:** Logstash\
**Created:** [July 23, 2019, 2:14pm UTC](https://discuss.elastic.co/t/issue-with-regex-pattern-for-prune-filter-plugin-blacklist-names/191834 "2019-07-23T14:14:32Z")\
**Posts on this page:** 1\
**Showing post:** 2

<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:** [July 23, 2019, 2:22pm UTC](https://discuss.elastic.co/t/issue-with-regex-pattern-for-prune-filter-plugin-blacklist-names/191834/2 "2019-07-23T14:22:28Z")

</div>

No, it does not work that way. See [this](https://discuss.elastic.co/t/using-prune-filter-to-remove-null-value-fields/191659/2) post.

---

_[View the full topic](https://discuss.elastic.co/t/issue-with-regex-pattern-for-prune-filter-plugin-blacklist-names/191834)._