Bit-wise scoring field type
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Key: SOLR-1918
URL: https://issues.apache.org/jira/browse/SOLR-1918
Project: Solr
Issue Type: New Feature
Components: Schema and Analysis
Affects Versions: 3.1
Reporter: Andrzej Bialecki
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 scores.
NOTE: currently only single value per field, a future extension will support
multiple values.
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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