Mikhail Khludnev created SOLR-9510:
--------------------------------------
Summary: child level facet exclusions
Key: SOLR-9510
URL: https://issues.apache.org/jira/browse/SOLR-9510
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: Facet Module, faceting, query parsers
Reporter: Mikhail Khludnev
h2. Challenge
* Since SOLR-5743 achieved block join child level facets with counts roll-up to
parents, there is a demand for filter exclusions.
h2. Context
* Then, it's worth to consider JSON Facets as an engine for this functionality
rather than support a separate component.
* During a discussion in SOLR-8998 [a solution for block join with child level
exclusion|https://issues.apache.org/jira/browse/SOLR-8998?focusedCommentId=15487095&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15487095]
has been found.
h2. Proposal
It's proposed to provide a bit of syntax sugar to make it user friendly,
believe it or not.
h2. List of improvements
* introducing a local parameter {{filters}} for {{\{!paarent}} query parser
referring to _multiple_ filters queries via parameter name: {{\{!parent
filters=$child.fq ..}..&child.fq=color:Red&child.fq=size:XL}}
these _filters_ are intersected with a child query supplied as a subordinate
clause.
* introducing {{\{!filters params=$child.fq excludeTags=color
v=$subq}&subq=text:word&child.fq={!tag=color}color:Red&child.fq=size:XL}} it
intersects a subordinate clause (here it's {{subq}} param, and the trick is to
refer to the same query from {{\{!parent}}}), with multiple filters supplied
via parameter name {{params=$child.fq}}, it also supports {{excludeTags}}.
Regarding the latter parser, the alternative approach might be to move into
{{domain:\{..}}} instruction of json facet. From the implementation
perspective, it's desired to optimize with bitset processing, however I suppose
it's might be deferred until some initial level of maturity.
h2. Example
{code}
q={!parent which=type_s:book filters=$child.fq
v=$childquery}&childquery=comment_t:good&child.fq={!tag=author}author_s:yonik&child.fq={!tag=stars}stars_i:(5
3)&wt=json&indent=on&json.facet={
comments_for_author:{
type:query,
q:"{!filters params=$child.fq excludeTags=authors v=$childquery}",
"//note":"author filter is excluded",
domain:{
blockChildren:"type_s:book",
"//":"applying filters here might be more promising"
}, facet:{
authors:{
type:terms,
field:author_s,
facet: {
in_books: "unique(_root_)"
}
}
}
} ,
comments_for_stars:{
type:query,
q:"{!filters params=$child.fq excludeTags=stars v=$childquery}",
"//note":"stars_i filter is excluded",
domain:{
blockChildren:"type_s:book"
}, facet:{
stars:{
type:terms,
field:stars_i,
facet: {
in_books: "unique(_root_)"
}
}
}
}
}
{code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
