[LUCENE-9393] FunctionScoreQuery shouldn’t use TOP_DOCS for creating inner weight

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 9.0, 8.6
• Lucene Fields: New
• Assignee: Tomas Eduardo Fernandez Lobbe
• Reporter: Tomas Eduardo Fernandez Lobbe
• Created: 04/Jun/20 22:58
• Updated: 28/Aug/22 16:03
• Resolved: 05/Jun/20 18:25

Description

FunctionScoreQuery.createWeight creates the weight of the inner query using the scoreMode from it’s input parameter, however, FunctionScoreQuery can’t really use WAND algorithm, and the Scorer used will ignore calls to set competitive scores. FunctionScoreQuery should just turn TOP_DOCS to COMPLETE before creating the inner query's weight.

Issue Links

• links to: GitHub Pull Request #1553