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From "Billow Gao (JIRA)" <>
Subject [jira] Commented: (LUCENE-1599) SpanRegexQuery and SpanNearQuery is not working with MultiSearcher
Date Fri, 12 Jun 2009 19:21:07 GMT


Billow Gao commented on LUCENE-1599:

Not there.
If you use the query one those two IndexSearcher one by one, then you will find that only
the first search has a match.
The second one always fail.

For example:

SpanRegexQuery srq = new SpanRegexQuery(new Term("field", "a.*"));
        SpanRegexQuery stq = new SpanRegexQuery(new Term("field", "b.*"));
        SpanNearQuery query = new SpanNearQuery(new SpanQuery[] { srq, stq },
                6, true);
IndexSearcher[] arrSearcher = new IndexSearcher[2];
        arrSearcher[0] = new IndexSearcher(indexStoreA);
        arrSearcher[1] = new IndexSearcher(indexStoreB);

Hits hits = arrSearcher[0].search(query);
assertEquals(1, hits.length());

hits = arrSearcher[1].search(query);

//fail here because query rewrite will not use new term.
//The problem should sit inside spanquery, maybe it only call rewrite function once.
//Anyway, I didn't check its source code yet.
assertEquals(1, hits.length()); 


> SpanRegexQuery and SpanNearQuery is not working with MultiSearcher
> ------------------------------------------------------------------
>                 Key: LUCENE-1599
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: contrib/*
>    Affects Versions: 2.4.1
>         Environment: lucene-core 2.4.1, lucene-regex 2.4.1
>            Reporter: Billow Gao
>             Fix For: 2.9
>         Attachments:
>   Original Estimate: 2h
>  Remaining Estimate: 2h
> MultiSearcher is using:
> queries[i] = searchables[i].rewrite(original);
> to rewrite query and then use combine to combine them.
> But SpanRegexQuery's rewrite is different from others.
> After you call it on the same query, it always return the same rewritten queries.
> As a result, only search on the first IndexSearcher work. All others are using the first
IndexSearcher's rewrite queries.
> So many terms are missing and return unexpected result.
> Billow

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