[LUCENE-7840] BooleanQuery.rewriteNoScoring - optimize away any SHOULD clauses if at least 1 MUST/FILTER clause and 0==minShouldMatch

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 9.0, 8.2
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Chris M. Hostetter
• Created: 19/May/17 19:04
• Updated: 28/Aug/22 15:15
• Resolved: 09/May/19 08:51

Description

I haven't thought this through completely, let alone write up a patch / test case, but IIUC...

We should be able to optimize {{ BooleanQuery rewriteNoScoring() }} so that (after converting MUST clauses to FILTER clauses) we can check for the common case of 0==getMinimumNumberShouldMatch() and throw away any SHOULD clauses as long as there is is at least one FILTER clause.