# Just Pushed: Exists and Missing filters and extension to use them in query\_string query
**URL:** https://discuss.elastic.co/t/just-pushed-exists-and-missing-filters-and-extension-to-use-them-in-query-string-query/3467
**Category:** Elasticsearch
**Created:** [October 22, 2010, 3:57pm UTC](https://discuss.elastic.co/t/just-pushed-exists-and-missing-filters-and-extension-to-use-them-in-query-string-query/3467 "2010-10-22T15:57:16Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@kimchy](https://discuss.elastic.co/u/kimchy)
#### Post date: [October 22, 2010, 3:57pm UTC](https://discuss.elastic.co/t/just-pushed-exists-and-missing-filters-and-extension-to-use-them-in-query-string-query/3467/1 "2010-10-22T15:57:16Z")
Hey,
The exists and missing filters allow to filter if a field has a value in a
document, or not:
[http://github.com/elasticsearch/elasticsearch/issues/closed#issue/445](http://github.com/elasticsearch/elasticsearch/issues/closed#issue/445).
There is also an extension syntax to a query string based queries:
[http://github.com/elasticsearch/elasticsearch/issues/closed#issue/446](http://github.com/elasticsearch/elasticsearch/issues/closed#issue/446).
Note, this is a highly optimized implementation (post first invocation), and
its better to use it then what was suggested previously (before this feature
was available): field1[\* TO \*].
-shay.banon
---
### Author:  [@ppearcy](https://discuss.elastic.co/u/ppearcy)
#### Post date: [October 22, 2010, 9:53pm UTC](https://discuss.elastic.co/t/just-pushed-exists-and-missing-filters-and-extension-to-use-them-in-query-string-query/3467/2 "2010-10-22T21:53:32Z")
Awesome, thank you!!!
On Oct 22, 9:57 am, Shay Banon [shay.ba...@elasticsearch.com](mailto:shay.ba...@elasticsearch.com) wrote:
> Hey,
>
> The exists and missing filters allow to filter if a field has a value in a
> document, or not:[Issues · elastic/elasticsearch · GitHub](http://github.com/elasticsearch/elasticsearch/issues/closed#issue/445).
>
> There is also an extension syntax to a query string based queries:[Issues · elastic/elasticsearch · GitHub](http://github.com/elasticsearch/elasticsearch/issues/closed#issue/446).
>
> Note, this is a highly optimized implementation (post first invocation), and
> its better to use it then what was suggested previously (before this feature
> was available): field1[\* TO \*].
>
> -shay.banon
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 4:17am UTC](https://discuss.elastic.co/t/just-pushed-exists-and-missing-filters-and-extension-to-use-them-in-query-string-query/3467/3 "2017-07-06T04:17:39Z")