[
https://issues.apache.org/jira/browse/SOLR-2498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Neil Hooey updated SOLR-2498:
-----------------------------
Labels: (was: boost multivalue multivalued)
Description:
I accidentally double-submitted this bug when my browser crashed.
Here is the real one:
https://issues.apache.org/jira/browse/SOLR-2499
was:
Currently, if you boost a value in a multivalued field during index time, the
boosts are consolidated for every field, and the individual values are lost.
So, for example, given a list of photos with a multivalue field "keywords", and
a boost for a keyword assigned to a photo corresponds to the number of times
that photo was downloaded after searching for that particular keyword.
{code}
photo1: Photo of a cat by itself:
keywords: [ cat:600 feline:100 ]
=> boost total = 700
photo2: Photo of a cat driving a truck:
keywords: [ cat:100 feline:90 animal:80 truck:1000 ]
=> boost total = 1270
{code}
If you search for "cat feline", photo2 will rank higher, since the boost of
"cat-like" words was consolidated for the "truck" boost anomoly to score a
total of 1270. Whereas photo1, which has more "cat feline" downloads, only gets
a score of 700, and ranks lower.
*Intuitively the boosts should be separate, so only the boosts for the terms
searched will be counted.*
Given the current behaviour, you are forced to do one of the following:
1. Assemble all of the multi-values into a string, and use payloads in place of
boosts.
2. Use dynamic fields, such as keyword_*, and boost them independently.
Neither of these solutions are ideal, as using payloads requires writing your
own BoostingTermQuery, and defining a new dynamic field per multi-value makes
searching more difficult than with mutlivalued fields.
There's a blog link that describes the current behaviour:
http://blog.kapilchhabra.com/2008/01/solr-index-time-boost-facts-2
Affects Version/s: (was: Next)
(was: 4.0)
(was: 3.1)
> Stop consolidating boosts for values of multivalued fields
> ----------------------------------------------------------
>
> Key: SOLR-2498
> URL: https://issues.apache.org/jira/browse/SOLR-2498
> Project: Solr
> Issue Type: Improvement
> Reporter: Neil Hooey
>
> I accidentally double-submitted this bug when my browser crashed.
> Here is the real one:
> https://issues.apache.org/jira/browse/SOLR-2499
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
