[SOLR-6600] configurable relevance impact of phrases for edismax

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 4.9
• Component/s: query parsers
• Labels: edismax
• Assignee: Unassigned
• Reporter: Alexey Kozhemiakin
• Created: 07/Oct/14 14:14
• Updated: 11/Feb/16 10:23
• Resolved: 08/Oct/14 15:11

Description

Currently solr has a tie breaker parameter which control how to aggregate relevance score for search hits.

But score for fields (pf, pf2, pf3) are always summed up.

The goal of the patch is to wrap phrase clauses into single dismax clause instead of multipe ones

Before patch
+(
DisjunctionMaxQuery((Body:james | Title:james)~tie_breaker)
DisjunctionMaxQuery((Body:kirk | Title:kirk)~tie_breaker))
)
DisjunctionMaxQuery((Body:"james kirk")~tie_breaker)
DisjunctionMaxQuery((Title:"james kirk")~tie_breaker)

after patch
+(
DisjunctionMaxQuery((Body:james | Title:james)~tie_breaker)
DisjunctionMaxQuery((Body:kirk | Title:kirk)~tie_breaker))
)
DisjunctionMaxQuery((Body:"james kirk" | Title:"james kirk") ~tie_breaker)

Issue Links

• duplicates: SOLR-6062 Phrase queries are created for each field supplied through edismax's pf, pf2 and pf3 parameters (rather them being combined in a single dismax query)