MatchAllScorer calculateDocFilter() bug
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                 Key: JCR-1051
                 URL: https://issues.apache.org/jira/browse/JCR-1051
             Project: Jackrabbit
          Issue Type: Bug
          Components: indexing
    Affects Versions: 1.3
            Reporter: Ard Schrijvers
             Fix For: 1.4


In MatchAllScorer.calculateDocFilter(), When you have just two nodes, with 
different properties, like "myprop" and "myprop2", and you have an xpath String 
xpath = "//[EMAIL PROTECTED], you get both nodes back (to be precise, you'll 
get every node that has a property that startswith "myprop")


You can reproduce it by changing the SimpleQueryTest.testIsNotNull() a little:

Change 

bar.setProperty("text", "the quick brown fox jumps over the lazy dog."); 

to

bar.setProperty("mytextwhichstartswithmytext", "the quick brown fox jumps over 
the lazy dog.");

Now the test with xpath = "//[EMAIL PROTECTED]:primaryType='nt:unstructured' 
and @mytext]"; fails because 2 results. I did test for the trunk and tag 1.3.1 
and both have the same problem. I have attached MatchAllScorer.java.patch in 
this mail, or should I create a JIRA issue for this? 

Furthermore I would like to discuss a different implementation for the 
MatchAllScorer, because IMHO the current calculateDocFilter() becomes slow 
pretty fast (see bottom email the code part i am referring to: if you have 
100.000 docs with "mytext" property, and you query  [EMAIL PROTECTED] the loop 
below is executed at least 100.000 times). I think it might be out of scope for 
the user-list, or is the user-list the place to discuss something like this? 

-----------------------------------------------------------------------

TermEnum terms = reader.terms(new Term(FieldNames.PROPERTIES, field));
        try {
            TermDocs docs = reader.termDocs();
            try {
                while (terms.term() != null
                        && terms.term().field() == FieldNames.PROPERTIES
                        && terms.term().text().startsWith(field)) {
                    docs.seek(terms);
                    while (docs.next()) {
                        docFilter.set(docs.doc());
                    }
                    terms.next();
                }
            } finally {
                docs.close();
            }
        } finally {
            terms.close();
        }

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