[SOLR-16994] facilitate date-related FieldValueFeature extensions (docValues=True only)

• Type: Task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: main (10.0), 9.4
• Component/s: contrib - LTR
• Assignee: Christine Poerschke
• Reporter: Christine Poerschke
• Created: 22/Sep/23 17:12
• Updated: 15/Oct/23 19:57
• Resolved: 02/Oct/23 10:57

Description

Currently having custom features such as relative "document age" or "remaining shelf life" based on a date field requires duplication of a lot of the FieldValueFeature code:

• https://github.com/apache/solr/blob/releases/solr/9.3.0/solr/modules/ltr/src/java/org/apache/solr/ltr/feature/FieldValueFeature.java

The NumericDocValuesFieldValueFeatureScorer.readNumericDocValues() implementation already considers the float and double NumberType choices and by also considering NumberType.DATE there we could facilitate date-related extensions:

• https://github.com/apache/solr/blob/releases/solr/9.3.0/solr/modules/ltr/src/java/org/apache/solr/ltr/feature/FieldValueFeature.java#L251
• https://github.com/apache/solr/blob/releases/solr/9.3.0/solr/core/src/java/org/apache/solr/schema/NumberType.java#L27

Issue Links

• links to: GitHub Pull Request #1950