# Null values

**URL:** <https://discuss.elastic.co/t/null-values/7052>\
**Category:** Elasticsearch\
**Created:** [March 19, 2012, 1:00pm UTC](https://discuss.elastic.co/t/null-values/7052 "2012-03-19T13:00:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Yehuda\_Zargarov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yehuda_zargarov/32/2164_2.png) [@Yehuda\_Zargarov](https://discuss.elastic.co/u/Yehuda_Zargarov)\
**Post date:** [March 19, 2012, 1:00pm UTC](https://discuss.elastic.co/t/null-values/7052/1 "2012-03-19T13:00:13Z")

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I have an int field in an index. when i put 0 value in it, i see the  
value as null (using HEAD plugin).  
But when i run a query on it, i see the value as 0.

Any reason for that?

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**Author:** ![avasilenko](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/avasilenko/32/2901_2.png) [@avasilenko](https://discuss.elastic.co/u/avasilenko)\
**Post date:** [March 19, 2012, 1:05pm UTC](https://discuss.elastic.co/t/null-values/7052/2 "2012-03-19T13:05:33Z")

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Hello Yehuda,

HEAD plugin converts 0 to null, while showing them. At source it's still  
zero. I assume for empty string it's the same.

Regards,  
Alexandr Vasilenko

2012/3/19 Yehuda Zargarov [yz1583@gmail.com](mailto:yz1583@gmail.com)

> I have an int field in an index. when i put 0 value in it, i see the  
> value as null (using HEAD plugin).  
> But when i run a query on it, i see the value as 0.
> 
> Any reason for that?

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**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, 3:35am UTC](https://discuss.elastic.co/t/null-values/7052/3 "2017-07-06T03:35:36Z")

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