# Mapreduce with filter script?

**URL:** <https://discuss.elastic.co/t/mapreduce-with-filter-script/22386>\
**Category:** Elasticsearch\
**Created:** [February 25, 2015, 2:50pm UTC](https://discuss.elastic.co/t/mapreduce-with-filter-script/22386 "2015-02-25T14:50:19Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![bryan\_rasmussen](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bryan_rasmussen/32/874_2.png) [@bryan\_rasmussen](https://discuss.elastic.co/u/bryan_rasmussen)\
**Post date:** [February 25, 2015, 2:50pm UTC](https://discuss.elastic.co/t/mapreduce-with-filter-script/22386/1 "2015-02-25T14:50:19Z")

</div>

Hi,

I would like to get a script to work like mapreduce over the results of my  
query, so that if I have a query that returns 4 documents  
{  
brands: "brand1"  
},  
{  
brands: "brand2"  
},  
{  
brands: "brand2"  
},  
{  
brands: "brand3"  
}

and what I want to come out is the documents

{  
brands: "brand1"  
},  
{  
brands: "brand2"  
},  
{  
brands: "brand3"  
}

of course this is a very simplified example, and the query I am doing is  
not on the brands field but it is the brands field I want to reduce / get  
rid of duplicates.

thanks,  
Bryan Rasmussen

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---

<div class="post-metadata">

**Author:** ![javadevmtl](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/javadevmtl/32/45613_2.png) [@javadevmtl](https://discuss.elastic.co/u/javadevmtl)\
**Post date:** [February 25, 2015, 3:44pm UTC](https://discuss.elastic.co/t/mapreduce-with-filter-script/22386/2 "2015-02-25T15:44:11Z")

</div>

So do an agreggation on term = brand?

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On Wednesday, 25 February 2015 09:50:19 UTC-5, bryan rasmussen wrote:

> Hi,
> 
> I would like to get a script to work like mapreduce over the results of my  
> query, so that if I have a query that returns 4 documents  
> {  
> brands: "brand1"  
> },  
> {  
> brands: "brand2"  
> },  
> {  
> brands: "brand2"  
> },  
> {  
> brands: "brand3"  
> }
> 
> and what I want to come out is the documents
> 
> {  
> brands: "brand1"  
> },  
> {  
> brands: "brand2"  
> },  
> {  
> brands: "brand3"  
> }
> 
> of course this is a very simplified example, and the query I am doing is  
> not on the brands field but it is the brands field I want to reduce / get  
> rid of duplicates.
> 
> thanks,  
> Bryan Rasmussen

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For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).

---

<div class="post-metadata">

**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, 12:30am UTC](https://discuss.elastic.co/t/mapreduce-with-filter-script/22386/3 "2017-07-06T00:30:09Z")

</div>

Closed on July 6, 2017, 12:30am UTC