lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Paul Elschot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-7580) Spans tree scoring
Date Thu, 29 Dec 2016 23:07:58 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-7580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paul Elschot updated LUCENE-7580:
---------------------------------
    Attachment: LUCENE-7580.patch

Patch of 29 Dec 2016.

Compared to the previous patch, this adds:

Limiting the max allowed slop to Integer.MAX_VALUE-1 in the SpanNearQuery constructor and
in TestSpanSearchEquivalence. An actual slop of Integer.MAX_VALUE causes an overflow in distance+1
that is used in computeSlopFactor. Since the same limitation is already present for indexed
positions, I would not expect this slop factor miscalculation to actually occur.

The negative slops that occur for overlapping spans are changed to 0 before passing them to
computeSlopFactor in NearSpansDocScorer in the patch here.

The non match distance passed to SpanNearQuery in the patch is verified to be at least the
given slop.

A wrapper method SpansTreeScorer.wrap() is added that will wrap the span (subqueries of a)
given query in a SpansTreeQuery. This works for span subqueries of BooleanQuery, DisjunctionMaxQuery
and BoostQuery.

> Spans tree scoring
> ------------------
>
>                 Key: LUCENE-7580
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7580
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: master (7.0)
>            Reporter: Paul Elschot
>            Priority: Minor
>             Fix For: 6.x
>
>         Attachments: LUCENE-7580.patch, LUCENE-7580.patch, LUCENE-7580.patch
>
>
> Recurse the spans tree to compose a score based on the type of subqueries and what matched



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message