[SOLR-13751] Add BooleanSimilarityFactory to Solr

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 8.7, 9.0
• Assignee: Christine Poerschke
• Reporter: Andy Webb
• Created: 10/Sep/19 18:03
• Updated: 04/Nov/20 15:22
• Resolved: 12/Aug/20 14:47

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