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https://issues.apache.org/jira/browse/LUCENE-2250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12830151#action_12830151
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Paul Elschot commented on LUCENE-2250:
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Basically this involves transposing/reordering the current prx file from the
current term/docs/posns to doc/terms/posns.
The biggest advantage would be in searches that use proximity: since all
positions within a document are used at the same time, no long seeks would be
necessary to get the positions for scoring a single document.
For small documents, the cost of this could be that in the current order the
number of seeks might be no bigger than the number of terms, whereas with the
order proposed here the number of seeks would be no bigger than the number of
documents containing all terms.
Other than that, there are these advantages:
- adding/deleting a doc to/from the prx file is a lot simpler, and
- document term vectors with positions can be taken directly from the prx file.
Has this been tried/discussed before?
> Index positions in document term vectors only
> ---------------------------------------------
>
> Key: LUCENE-2250
> URL: https://issues.apache.org/jira/browse/LUCENE-2250
> Project: Lucene - Java
> Issue Type: Wish
> Components: Index
> Reporter: Paul Elschot
>
> For searching with positions this might reduce the number of (longer) seeks
> to one per document containing all terms.
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