[LUCENE-4470] Expose SpanFirst in eDismax

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 4.0-BETA
• Component/s: modules/queryparser

Environment

solr-spec 5.0.0.2012.10.09.19.29.59
solr-impl 5.0-SNAPSHOT 1366361:1396116M - markus - 2012-10-09 19:29:59

• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Markus Jelsma
• Created: 10/Oct/12 11:14
• Updated: 28/Aug/22 13:29
• Resolved: 10/Oct/12 11:16

Description

Expose Lucene's SpanFirst capability in Solr's extended Dismax query parser. This issue adds the SF-parameter (SpanFirst) and takes a FIELD~DISTANCE^BOOST formatted value.

For example, sf=title~5^2 will give a boost of 2 if one of the normal clauses, originally generated for automatic phrase queries, is located within five positions from the field's start.

Unit test is included and all tests pass.