[LUCENE-1999] Match spotter for all query types

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.9
• Component/s: core/search
• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Mark Harwood
• Created: 20/Oct/09 23:09
• Updated: 28/Aug/22 12:12

Description

Related to LUCENE-1929 and the current inability to highlight NumericRangeQuery, spatial, cached term filters and other exotica.

This patch provides the ability to wrap any Query objects and record match info as flags encoded in the overall document score.
Using this approach it would be possible to understand (and therefore highlight) which fields matched clauses in a query.

The match encoding approach loses some precision in scores as noted here: http://tinyurl.com/ykt8nx7

Avoiding these precision issues would require a change to Lucene core to record docId, score AND a matchFlag byte in ScoreDoc objects and collector APIs.
This may be something we should consider.