[SOLR-13751] Add BooleanSimilarityFactory to Solr

• Type: New Feature
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Security Level: Public (Default Security Level. Issues are Public)
• Assignee: Unassigned
• Reporter: Andy Webb
• Created: 10/Sep/19 18:03
• Updated: 12/Sep/19 10:46

Description

Solr doesn't expose Lucene's BooleanSimilarity (ref LUCENE-5867) so it's not available for use in situations where BM25/TDF-IF are not useful. (Fields using this similarity will likely also set omitNorms and omitTermFreqAndPositions to true.)

Our use case is ngram-driven suggestions, where the frequency of occurrence of a particular sequence of characters is not something users would expect to be taken into account when ordering suggestions.

 

Here's my PR: https://github.com/apache/lucene-solr/pull/867 (I'm at Activate if anyone would like to talk this through in person.)

Issue Links

• depends upon: LUCENE-5867 Add BooleanSimilarity
• links to: GitHub Pull Request #867