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Posted to dev@lucene.apache.org by "Christian Kohlschuetter (JIRA)" <ji...@apache.org> on 2006/06/19 14:12:33 UTC
[jira] Updated: (LUCENE-606) Change behavior of
ParallelReader.document(int)
[ http://issues.apache.org/jira/browse/LUCENE-606?page=all ]
Christian Kohlschuetter updated LUCENE-606:
-------------------------------------------
Attachment: patch-allfields.diff
Patch to ParallelReader. Implementation of the proposed parameter.
> Change behavior of ParallelReader.document(int)
> -----------------------------------------------
>
> Key: LUCENE-606
> URL: http://issues.apache.org/jira/browse/LUCENE-606
> Project: Lucene - Java
> Type: Improvement
> Components: Index
> Versions: 2.0.0
> Reporter: Christian Kohlschuetter
> Attachments: ParallelReaderTest2.java, patch-allfields.diff
>
> Currently, the returned documents contain, for each field, the stored data from all enclosed IndexReaders which contain the corresponding field.
> That is, a call to ParallelReader.document(doc).getFields(fieldName) returns an array of possibly several Field objects. Since null entries are disallowed, there is no way to determine to which IndexReader the field data exactly belongs.
> On the other side, a search for a term on that field only yields results if that term was contained in the *first* matching IndexReader which contained the field.
> Thus, when merging the ParallelReader contents to another IndexWriter, the indexed data does not correspond to the stored information.
> I am not sure whether this can be considered a bug (in some cases, this may exactly be required). However I would like to see an option to change this behaviour.
> I suggest a parameter for ParallelReader which specifies whether stored data from all IndexReaders or only from the one which is repsonsible for the field's indexed data will be returned by ParallelReader.document(int).
> Please find my proposed implementation attached, as well as a JUnit testcase.
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