[SOLR-758] Enhance DisMaxQParserPlugin to support full-Solr syntax and to support alternate escaping strategies.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.3
• Fix Version/s: 4.9, 6.0
• Component/s: search
• Assignee: Unassigned
• Reporter: David Smiley
• Created: 05/Sep/08 20:53
• Updated: 09/May/16 18:48

Description

The DisMaxQParserPlugin has a variety of nice features; chief among them is that is uses the DisjunctionMaxQueryParser. However it imposes limitations on the syntax.

I've enhanced the DisMax QParser plugin to use a pluggable query string re-writer (via subclass extension) instead of hard-coding the logic currently embedded within it (i.e. the escape nearly everything logic). Additionally, I've made this QParser have a notion of a "simple" syntax (the default) or non-simple in which case some of the logic in this QParser doesn't occur because it's irrelevant (phrase boosting and min-should-max in particular). As part of my work I significantly moved the code around to make it clearer and more extensible. I also chose to rename it to suggest it's role as a parser for user queries.

Attachment to follow...

Issue Links

• depends upon: SOLR-756 Make DisjunctionMaxQueryParser generally useful by supporting all query types.
• depends upon: SOLR-757 SolrQueryParser should support escaping of characters in lieu of analysis for prefix & wildcard & fuzzy searches.
• is blocked by: SOLR-1553 extended dismax query parser
• relates to: SOLR-629 Fuzzy search with eDisMax request handler