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https://issues.apache.org/jira/browse/LUCENE-5627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14558427#comment-14558427
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Paul Elschot commented on LUCENE-5627:
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The patch of 20150525 against the 5.2 branch has:
- support for two phase iteration by using ConjunctionIterator over the term
enum of the payload term the spans of the input span query. This defers payload
loading for the payloads on the fragment positions and the tree info. This is
implemented in an added package private LabelQuery that is the superclass of
all positional joins queries.
- various improved/simplified hashCode/equals methods, removal of unused
imports.
- LeafFragmentsQuery was deleted, this was untested and not working well. I'll
add it again later. This provided the non empty leaf fragments in from a label
tree, and this is occasionally good to have.
- the test code uses SpanWithinQuery from core.
The util.eliasfano package has a new BitSelect class which is based on the
recently removed BitUtil.select method.
I'll move the util.eliasfano into the label module here later, in the patch it
is the core module.
The patch was prepared on an svn checkout of the 5.2 branch. I'd rather use
git, but the 5.2 branch is not yet available in the git mirror, see INFRA-9182.
> Positional joins
> ----------------
>
> Key: LUCENE-5627
> URL: https://issues.apache.org/jira/browse/LUCENE-5627
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Paul Elschot
> Priority: Minor
> Attachments: LUCENE-5627-20141126.patch, LUCENE-5627-20150525.patch
>
>
> Prototype of analysis and search for labeled fragments
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