[SOLR-8998] JSON Facet API child roll-ups

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.4, 8.0
• Component/s: Facet Module
• Assignee: Mikhail Khludnev
• Reporter: Yonik Seeley
• Created: 15/Apr/16 15:27
• Updated: 22/Apr/20 20:22
• Resolved: 02/May/18 15:24

Description

The JSON Facet API currently has the ability to map between parents and children ( see http://yonik.com/solr-nested-objects/ )
This issue is about adding a true rollup ability where parents would take on derived values from their children. The most important part (and the most difficult part) will be the external API.

mkhludnev says

The bottom line is to introduce uniqueBlock(_root_) aggregation, which is supposed to be faster than unique(_root_) and purposed for blocked index only. For now it it supports singlevalue string fields, docValues usually make sense.

Issue Links

• causes: SOLR-12875 ArrayIndexOutOfBoundsException when using uniqueBlock(_root_) in JSON Facets
• is related to: SOLR-9510 child level facet exclusions
• relates to: SOLR-7830 topdocs facet function
• relates to: SOLR-12324 handling numeric fields in uniqueBlock(id) aggregation for JSON Facet
• relates to: SOLR-12325 introduce uniqueBlockQuery(parent:true) aggregation for JSON Facet
• relates to: SOLR-9683 include/exclude filters by tag
• links to: attempt to get filter exclusions at the single request