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https://issues.apache.org/jira/browse/LUCENE-7398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul Elschot updated LUCENE-7398:
---------------------------------
Attachment: LUCENE-7398-20160814.patch
Patch of 14 August 2016.
This uses the span position queue from master, and adds the above w1..w5 test
case with slop 1.
This reintroduces a shrink in shrinkToDecreaseSlop:
{code}
/** The subSpans are ordered in the same doc and matchSlop is too big.
* Try and decrease the slop by calling nextStartPosition() on all subSpans
except the last one in reverse order.
* Return true iff an ordered match was found with small enough slop.
*/
private boolean shrinkToDecreaseSlop() throws IOException {
...
}
{code}
This also adds a FIXME to collect():
{code}
/** FIXME: the subspans may be after the current match. */
{code}
Payload collection can still be added, I left that to be done.
It only fails the test case TestSpanCollection.testNestedNearQuery reporting
that a term was not collected properly, the other search tests pass.
> 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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