[LUCENE-5226] optimize sortfield.needsScore on expressions

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.6, 6.0
• Component/s: modules/other
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Robert Muir
• Created: 18/Sep/13 21:36
• Updated: 28/Aug/22 13:53
• Resolved: 19/Sep/13 19:50

Description

To fix LUCENE-5222, it currently returns true with // TODO: optimize.

this is needed for e.g. IndexSearcher with executorService search to merge results from the different segments.

ideally we should only return this if it really does need it, not if its essentially just a computed field.