[SOLR-3636] edismax, synonyms and mm=100%

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Fix Version/s: 4.0
• Component/s: query parsers
• Assignee: Unassigned
• Reporter: Lance Norskog
• Created: 18/Jul/12 02:58
• Updated: 09/Oct/14 23:33
• Resolved: 16/Aug/12 00:15

Description

There is a problem with query-side synonyms, edismax and must-match=100%.

edismax interprets must-match=100% as "number of terms found by edismax from the original query". These terms go through the query analyzer, and the synonym filter creates more terms, but the must-match term count is not incremented. Thus, given a synonym of

monkeyhouse => monkey house

the query q=big+monkeyhouse&mm=100% becomes (effectively) q=big+monkey+house&mm=2. This query finds documents matching only two out of three terms big+monkey, monkey+house, big+house.

This might also be a problem in dismax.

Issue Links

• duplicates: SOLR-3589 Edismax parser does not honor mm parameter if analyzer splits a token
• is part of: SOLR-2368 Improve extended dismax (edismax) parser
• is related to: SOLR-3085 New edismax param mm.autoRelax to aid in fixing the dismax/edismax stopwords mm issue