This parser extends QueryParserBase and includes functionality from:
- Classic QueryParser: most of its syntax
- SurroundQueryParser: recursive parsing for "near" and "not" clauses.
- ComplexPhraseQueryParser: can handle "near" queries that include multiterms (wildcard, fuzzy, regex, prefix),
- AnalyzingQueryParser: has an option to analyze multiterms.
At a high level, there's a first pass BooleanQuery/field parser and then a span query parser handles all terminal nodes and phrases.
Same as classic syntax:
- term: test
- fuzzy: roam~0.8, roam~2
- wildcard: te?t, test*, t*st
- regex: /[mb]oat/
- phrase: "jakarta apache"
- phrase with slop: "jakarta apache"~3
- default "or" clause: jakarta apache
- grouping "or" clause: (jakarta apache)
- boolean and +/-: (lucene OR apache) NOT jakarta; +lucene +apache -jakarta
- multiple fields: title:lucene author:hatcher
Main additions in SpanQueryParser syntax vs. classic syntax:
- Can require "in order" for phrases with slop with the ~> operator: "jakarta apache"~>3
- Can specify "not near": "fever bieber"!~3,10 ::
find "fever" but not if "bieber" appears within 3 words before or 10 words after it.
- Fully recursive phrasal queries with [ and ]; as in: [[jakarta apache]~3 lucene]~>4 ::
find "jakarta" within 3 words of "apache", and that hit has to be within four words before "lucene"
- Can also use  for single level phrasal queries instead of " as in: [jakarta apache]
- Can use "or grouping" clauses in phrasal queries: "apache (lucene solr)"~3 :: find "apache" and then either "lucene" or "solr" within three words.
- Can use multiterms in phrasal queries: "jakarta~1 ap*che"~2
- Did I mention full recursion: [[jakarta~1 ap*che]~2 (solr~ /l[ou]+[cs][en]+/)]~10 :: Find something like "jakarta" within two words of "ap*che" and that hit has to be within ten words of something like "solr" or that "lucene" regex.
- Can require at least x number of hits at boolean level: "apache AND (lucene solr tika)~2
- Can use negative only query: -jakarta :: Find all docs that don't contain "jakarta"
- Can use an edit distance > 2 for fuzzy query via SlowFuzzyQuery (beware of potential performance issues!).
- Can specify prefix length in fuzzy queries: jakarta~1,2 (edit distance =1, prefix =2)
- Can specifiy Optimal String Alignment (OSA) vs Levenshtein for distance <=2: (jakarta~1 (OSA) vs jakarta~>1(Levenshtein)
This parser can be very useful for concordance tasks (see also LUCENE-5317 and LUCENE-5318) and for analytical search.
LUCENE-2878 is closed, this might have a use for fans of SpanQuery.
Most of the documentation is in the javadoc for SpanQueryParser.
Any and all feedback is welcome. Thank you.
Until this is added to the Lucene project, I've added a standalone lucene-addons repo (with jars compiled for the latest stable build of Lucene) on github.
- is depended upon by
SOLR-5410 Solr wrapper for the SpanQueryParser in LUCENE-5205
SOLR-5412 TermVariants from fuzzy and/or span search
LUCENE-5758 Extend SpanQueryParser with positional joins
- relates to
LUCENE-1823 QueryParser with new features for Lucene 3
LUCENE-1486 Wildcards, ORs etc inside Phrase queries