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https://issues.apache.org/jira/browse/LUCENE-7398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15504663#comment-15504663
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Paul Elschot commented on LUCENE-7398:
--------------------------------------
I have started on working on a SpanNearQuery that contains this:
{code}
/** Specifies how clauses are to occur near each other in matching documents.
*/
public static enum MatchNear {
/** Use this method for clauses that match when they are not ordered,
* and the slop should be determined between the end and start positions of
all clauses.
* When the subspans vary in length, some matches may not be found.
*/
UNORDERED,
/** Use this method for clauses that match when they are not ordered,
* and the slop should be determined between the start positions of the
first and last matching clauses.
*/
UNORDERED_STARTPOS,
/** Use this method for clauses that can match when they are ordered and
span collection is needed,
* and the slop should be determined between the end and start positions of
the clauses.
* When the subspans vary in length, some matches may not be found.
*/
ORDERED_LAZY,
/** Use this method for clauses that can match when they are ordered and
span collection is needed,
* and the slop should be determined between the end and start positions of
the clauses.
* When the subspans vary in length, some matches may not be found,
* however this method finds more matches than {@link ORDERED_LAZY}.
*/
ORDERED_LOOKAHEAD,
/** Use this method for clauses that match when they are ordered,
* and the slop should be determined between the start positions of the
first and last matching clauses.
*/
ORDERED_STARTPOS
}
{code}
> Nested Span Queries are buggy
> -----------------------------
>
> Key: LUCENE-7398
> URL: https://issues.apache.org/jira/browse/LUCENE-7398
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/search
> Affects Versions: 5.5, 6.x
> Reporter: Christoph Goller
> Assignee: Alan Woodward
> Priority: Critical
> Attachments: LUCENE-7398-20160814.patch, LUCENE-7398.patch,
> LUCENE-7398.patch, TestSpanCollection.java
>
>
> Example for a nested SpanQuery that is not working:
> Document: Human Genome Organization , HUGO , is trying to coordinate gene
> mapping research worldwide.
> Query: spanNear([body:coordinate, spanOr([spanNear([body:gene, body:mapping],
> 0, true), body:gene]), body:research], 0, true)
> The query should match "coordinate gene mapping research" as well as
> "coordinate gene research". It does not match "coordinate gene mapping
> research" with Lucene 5.5 or 6.1, it did however match with Lucene 4.10.4. It
> probably stopped working with the changes on SpanQueries in 5.3. I will
> attach a unit test that shows the problem.
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