# Filtering a variable does not work properly in Kibana4 **URL:** https://discuss.elastic.co/t/filtering-a-variable-does-not-work-properly-in-kibana4/32796 **Category:** Kibana **Created:** [October 22, 2015, 5:40pm UTC](https://discuss.elastic.co/t/filtering-a-variable-does-not-work-properly-in-kibana4/32796 "2015-10-22T17:40:24Z") **Posts on this page:** 3 **Page:** 1
### Author: ![avdevan](https://avatars.discourse-cdn.com/v4/letter/a/ed655f/32.png) [@avdevan](https://discuss.elastic.co/u/avdevan) #### Post date: [October 22, 2015, 5:40pm UTC](https://discuss.elastic.co/t/filtering-a-variable-does-not-work-properly-in-kibana4/32796/1 "2015-10-22T17:40:25Z")
I have the following column (post\_page\_event) with several entries. I want to be able to filter on that column to only pick out entries with post\_page\_event: 0. However, I get a null result. This only happens on select variables. For other variables everything works as expected. Is this a known issue? I includes the screen shots below. ![](https://us1.discourse-cdn.com/elastic/original/2X/6/681f2930e86ffcae561056a8cb01bcde3bc52f29.png) ![](https://us1.discourse-cdn.com/elastic/original/2X/9/9cecbd186fe32c93a29fac77330cd238121220b8.png) ---
### Author: ![tbragin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tbragin/32/45166_2.png) [@tbragin](https://discuss.elastic.co/u/tbragin) #### Post date: [October 29, 2015, 6:27am UTC](https://discuss.elastic.co/t/filtering-a-variable-does-not-work-properly-in-kibana4/32796/2 "2015-10-29T06:27:59Z")
what is the mapping for that field, a number of a string? ---
### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system) #### Post date: [July 6, 2017, 2:10pm UTC](https://discuss.elastic.co/t/filtering-a-variable-does-not-work-properly-in-kibana4/32796/3 "2017-07-06T14:10:27Z")