# Percolator and has\_parent filter
**URL:** https://discuss.elastic.co/t/percolator-and-has-parent-filter/9547
**Category:** Elasticsearch
**Created:** [November 4, 2012, 1:00pm UTC](https://discuss.elastic.co/t/percolator-and-has-parent-filter/9547 "2012-11-04T13:00:19Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@samuel\_merlet](https://discuss.elastic.co/u/samuel_merlet)
#### Post date: [November 4, 2012, 1:00pm UTC](https://discuss.elastic.co/t/percolator-and-has-parent-filter/9547/1 "2012-11-04T13:00:19Z")
Is it possible to use Has\_parent filter in a percolator ? I always have
erros while i'm trying to create one that contains such a filter .
Is there any solutions ? Where can i found a good documentation about what
is possible to do or not with percolator ?
thanks
--
---
### Author:  [@radu\_gheorghe](https://discuss.elastic.co/u/radu_gheorghe)
#### Post date: [November 6, 2012, 8:54am UTC](https://discuss.elastic.co/t/percolator-and-has-parent-filter/9547/2 "2012-11-06T08:54:54Z")
Hello Samuel,
For me at least, has\_child query or filter doesn't work with
percolator, either. I get this on 0.19.11:
{"error":"ElasticSearchException[failed to parse query [kuku2]];
nested: ","status":500}
With 0.20.0.RC1, I get a similar exception.
As for documentation, I couldn't find exactly what you can do with
percolator, although there's this hint in the code about nested docs:
[https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/percolator/PercolatorExecutor.java#L294](https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/percolator/PercolatorExecutor.java#L294)
Mind you, I don't know if this has something to do the failure for
has\_parent/has\_child filters. I could register a percolator with a
nested query without getting an error, although it doesn't seem to
work as expected.
## Best regards, Radu
[http://sematext.com/](http://sematext.com/) -- Elasticsearch -- Solr -- Lucene
On Sun, Nov 4, 2012 at 3:00 PM, samuel merlet [samuel.merlet@gmail.com](mailto:samuel.merlet@gmail.com) wrote:
> Is it possible to use Has\_parent filter in a percolator ? I always have
> erros while i'm trying to create one that contains such a filter .
>
> Is there any solutions ? Where can i found a good documentation about what
> is possible to do or not with percolator ?
>
> thanks
>
> --
--
---
### Author:  [@Igor\_Motov](https://discuss.elastic.co/u/Igor_Motov)
#### Post date: [November 6, 2012, 9:01pm UTC](https://discuss.elastic.co/t/percolator-and-has-parent-filter/9547/3 "2012-11-06T21:01:00Z")
Percolator doesn't support queries and filters that run against nested and
child/parent documents. The has\_child, has\_parent, top\_children, and nested
queries and has\_child, has\_parent, and nested filters are not supported at
this moment. I would expect everything else to work.
On Tuesday, November 6, 2012 3:55:07 AM UTC-5, Radu Gheorghe wrote:
> Hello Samuel,
>
> For me at least, has\_child query or filter doesn't work with
> percolator, either. I get this on 0.19.11:
>
> {"error":"ElasticSearchException[failed to parse query [kuku2]];
> nested: ","status":500}
>
> With 0.20.0.RC1, I get a similar exception.
>
> As for documentation, I couldn't find exactly what you can do with
> percolator, although there's this hint in the code about nested docs:
>
> [https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/percolator/PercolatorExecutor.java#L294](https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/percolator/PercolatorExecutor.java#L294)
>
> Mind you, I don't know if this has something to do the failure for
> has\_parent/has\_child filters. I could register a percolator with a
> nested query without getting an error, although it doesn't seem to
> work as expected.
>
> ## Best regards, Radu
>
> [http://sematext.com/](http://sematext.com/) -- Elasticsearch -- Solr -- Lucene
>
> On Sun, Nov 4, 2012 at 3:00 PM, samuel merlet \<[samuel...@gmail.com](mailto:samuel...@gmail.com)\\>
> wrote:
>
> > Is it possible to use Has\_parent filter in a percolator ? I always have
> > erros while i'm trying to create one that contains such a filter .
> >
> > Is there any solutions ? Where can i found a good documentation about
> > what
> > is possible to do or not with percolator ?
> >
> > thanks
> >
> > --
--
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 3:05am UTC](https://discuss.elastic.co/t/percolator-and-has-parent-filter/9547/4 "2017-07-06T03:05:52Z")