Filter vs Query in ES

Elastic Stack Elasticsearch
1

I am a bit confused betweenFilter(FilterBuilders) and Query(QueryBuilders).
Whatever possible with FilterBuilder is also achievable using QueryBuilders.
Is there any case which can only be possible with Filter?

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2

I think the primary difference between query and filter is that filter is
cacheable (Elasticsearch Platform — Find real-time answers at scale | Elastic). Also,
another major difference, is that filter is not applied on facets, while
query is.

On Fri, May 17, 2013 at 2:12 PM, Chetana ambha.career@gmail.com wrote:

I am a bit confused betweenFilter(FilterBuilders) and
Query(QueryBuilders). Whatever possible with FilterBuilder is also
achievable using QueryBuilders.
Is there any case which can only be possible with Filter?

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Thanks,
Aash

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3

Also note that filters only "filter" docs and are not taken into account when computing score.

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David :wink:
Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs

Le 17 mai 2013 à 10:53, aash dhariya aash.discover@gmail.com a écrit :

I think the primary difference between query and filter is that filter is cacheable (Elasticsearch Platform — Find real-time answers at scale | Elastic). Also, another major difference, is that filter is not applied on facets, while query is.

On Fri, May 17, 2013 at 2:12 PM, Chetana ambha.career@gmail.com wrote:

I am a bit confused betweenFilter(FilterBuilders) and Query(QueryBuilders). Whatever possible with FilterBuilder is also achievable using QueryBuilders.
Is there any case which can only be possible with Filter?

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Thanks,
Aash

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4

On 17 May 2013 10:53, aash dhariya aash.discover@gmail.com wrote:

Also, another major difference, is that filter is not applied on facets,
while query is.

To be clear: filters within the query ARE taken into account by facets, but
filters specified at the top level of the search request are only applied
after facets, eg:

query: {
    filtered: {
        query: { SOME QUERY },
        filter:   { SOME FILTER; TAKEN INTO ACCOUNT BY FACETS }
    }
},
filter: { SOME FILTER; ONLY APPLIED AFTER FACETS }

In general, the top-level filter parameter should only be used for this
purpose. Using it as a general filter will usually result in slower
performance

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