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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] Updated: (SOLR-1918) Bit-wise scoring field type
Date Tue, 18 May 2010 15:54:42 GMT


Andrzej Bialecki  updated SOLR-1918:

    Attachment: bitwise.patch

BitwiseField implementation and a unit test.

> Bit-wise scoring field type
> ---------------------------
>                 Key: SOLR-1918
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: Schema and Analysis
>    Affects Versions: 3.1
>            Reporter: Andrzej Bialecki 
>         Attachments: bitwise.patch
> This field type supports bit-wise matching with scoring over fields containing 32-bit
integer values.
> Internally during indexing the field value is interpreted as a 32-bit integer and converted
to a set of bitmask terms. During search the query term is also converted into a BooleanQuery
of corresponding bitmask terms, added as Occur.SHOULD clauses. The scoring of such query over
such field produces the desired effect, where bit patterns closest to the query get highest
> NOTE: currently only single value per field, a future extension will support multiple
> The difference between this issue and SOLR-1913 is that SOLR-1913 offers filtering only
(no scoring), while this implementation performs scoring, which allows finding the best matching
inexact bit patterns. This has applications in e.g. near-duplicate detection.

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