[
https://issues.apache.org/jira/browse/SOLR-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17233806#comment-17233806
]
Jason Gerlowski commented on SOLR-14921:
----------------------------------------
I'll qualify my comments below by admitting upfront that my understanding of
Solr's faceting code is surface-level at best. If what I say about performance
below is incorrect, just tell me so. That said...
The "templated bucketed facet query" syntax looks very powerful and worth
pursuing generally, but I wonder if it'd have different (worse) performance
characteristics for whitelist-of-terms scenario specifically.
In traditional faceting, the whitelist-of-terms support computes a single
docset for the domain and then gathers counts for the N whitelisted values from
that single docset. The JSON Faceting implementation you propose would require
computing N different domains entirely, one for each term. I suspect (but
don't know) that this would be costlier than the traditional implementation.
If that ignorant hand-waving about performance holds any water at all, then
maybe a different approach makes sense here in addition to having TBFQ for
other use cases.
> terms filter in json.facet
> --------------------------
>
> Key: SOLR-14921
> URL: https://issues.apache.org/jira/browse/SOLR-14921
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Facet Module
> Reporter: gopikannan venugopalsamy
> Priority: Minor
>
> Hi,
> In normal facet request below can be used to filter the facet terms. I am
> not able to do the same using json.facet. It would be useful in case of
> multivalued field facet and only filtered terms needs to be returned.
>
> h3. Limiting Facet with Certain Terms
> To limit field facet with certain terms specify them comma separated with
> {{terms}} local parameter. Commas and quotes in terms can be escaped with
> backslash, as in {{\,}}. In this case facet is calculated on a way similar to
> {{facet.method=enum}} , but ignores {{facet.enum.cache.minDf}}. For example:
> {{facet.field=\{!terms='alfa,betta,with\,with\',with space'}symbol}}
> {{}}
> [https://lucene.apache.org/solr/guide/6_6/faceting.html]
>
> Just like prefix parameter in json.facet I think we can add terms parameter
> and use it. Something like below.
>
> json.facet=\{facets:{type:terms,field:field1,terms:"a,b,c"}}
>
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
