[jira] Assigned: (JCR-1051) MatchAllScorer calculateDocFilter() bug

["Christoph Kiehl (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-1051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Christoph Kiehl reassigned JCR-1051:
------------------------------------

    Assignee: Christoph Kiehl

> MatchAllScorer calculateDocFilter() bug
> ---------------------------------------
>
>                 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
>            Assignee: Christoph Kiehl
>             Fix For: 1.4
>
>         Attachments: MatchAllScorer.java.patch, MatchAllScorerWithTest.patch
>
>
> In MatchAllScorer.calculateDocFilter(), When you have just two nodes, with different properties, like "myprop" and "myprop2", and you have an xpath String xpath = "//*[@myprop], 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 = "//*[@jcr: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  [@mytext] 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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