Hoss Man created SOLR-12567:
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Summary: Enhance JSON Facet aggregation syntax to support a JSON
Object based "type:func" form that supports local params
Key: SOLR-12567
URL: https://issues.apache.org/jira/browse/SOLR-12567
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Hoss Man
Assignee: Hoss Man
In SOLR-11709 I proposed adding an "expanded" JSON Object syntax for specifying
aggregation stats, as a way to ultimately support applying domain changes to
aggregations.
Having since done more work with the implementation of aggregations and how
they use SlotAcc(umulators) and how bucket sorting on aggregations work, I now
realize that the goal of SOLR-11709 is pretty hard -- but the idea of this
"expanded syntax" would still be useful as a way to specify Local Params to the
ValueSourceParser used for the aggregation -- and would but stats on par with
other {{"type"}} facets (syntactically).
For things like {{relatedness(...)}} (or other user defined custom
aggregations) it would allow for new optional configuration using "named"
params w/o needing an unweildy function syntax (see
[comment#16466664|https://issues.apache.org/jira/browse/SOLR-9480?focusedCommentId=16466664&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16466664]
in SOLR-9480). But even for simple aggregations the expanded syntax may help
folks with readability of expressions(w/o needing to resort to global params)
...
Proposed syntax...
{noformat}
"average_roi" : {
"type": "func",
"func": "avg(div($numer,$denom))",
"numer": "mul(popularity,rating)",
"denom": "mul(price,size)"
}
{noformat}
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