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Posted to java-user@lucene.apache.org by Pablo Mendes <pa...@gmail.com> on 2010/06/29 17:58:28 UTC
IndexWriter.mergeDocument(Term term, Document doc)
Hi all,
I'm looking for a functionality similar to IndexWriter.updateDocument()
*IndexWriter.**updateDocument<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/IndexWriter.html#updateDocument%28org.apache.lucene.index.Term,%20org.apache.lucene.document.Document%29>
*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
term,
Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
doc)
Updates a document by first deleting the document(s) containing
term and then adding the new document.
*IndexWriter.**updateDocument<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/IndexWriter.html#updateDocument%28org.apache.lucene.index.Term,%20org.apache.lucene.document.Document,%20org.apache.lucene.analysis.Analyzer%29>
*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
term,
Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
doc,
Analyzer<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/analysis/Analyzer.html>
analyzer)
Updates a document by first deleting the document(s) containing
term and then adding the new document.
But instead of deleting the document containing term and then adding the new
document,
I'd like to merge the information from the new document with the document
containing the term .
*IndexWriter.merge**Document*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
term,
Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
doc)
Updates a document by merging the information in the document
containing term and the new document.
*IndexWriter.merge**Document*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
term,
Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
doc, Analyzer<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/analysis/Analyzer.html>
analyzer)
Updates a document by merging the information in the document
containing term and the new document.
I couldn't find anything like that in 3.0.2 [1], so I assume I'll have to
implement it myself.
Is the implementation of IndexWriter.updateDocument itself a good starting
point?
Does anybody have suggestions on how to go about it? Or is it there in some
other shape or form?
Or is it absolutely discouraged?
Thanks,
Pablo
[1]
http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/class-use/Document.html
Re: IndexWriter.mergeDocument(Term term, Document doc)
Posted by Michael McCandless <lu...@mikemccandless.com>.
This idea has been discussed a few times on the list... eg try
googling on "incremental document field update".
It's tricky; Lucene doesn't make it easy to update just a portion of a
document's postings information. The implementation will be very
different from updateDocument...
Mike
On Tue, Jun 29, 2010 at 11:58 AM, Pablo Mendes <pa...@gmail.com> wrote:
> Hi all,
> I'm looking for a functionality similar to IndexWriter.updateDocument()
>
> *IndexWriter.**updateDocument<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/IndexWriter.html#updateDocument%28org.apache.lucene.index.Term,%20org.apache.lucene.document.Document%29>
> *(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
> term,
> Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
> doc)
> Updates a document by first deleting the document(s) containing
> term and then adding the new document.
>
> *IndexWriter.**updateDocument<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/IndexWriter.html#updateDocument%28org.apache.lucene.index.Term,%20org.apache.lucene.document.Document,%20org.apache.lucene.analysis.Analyzer%29>
> *(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
> term,
> Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
> doc,
> Analyzer<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/analysis/Analyzer.html>
> analyzer)
> Updates a document by first deleting the document(s) containing
> term and then adding the new document.
>
> But instead of deleting the document containing term and then adding the new
> document,
> I'd like to merge the information from the new document with the document
> containing the term .
>
> *IndexWriter.merge**Document*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
> term,
> Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
> doc)
> Updates a document by merging the information in the document
> containing term and the new document.
>
> *IndexWriter.merge**Document*(Term<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/index/Term.html>
> term,
> Document<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/Document.html>
> doc, Analyzer<http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/analysis/Analyzer.html>
> analyzer)
> Updates a document by merging the information in the document
> containing term and the new document.
>
> I couldn't find anything like that in 3.0.2 [1], so I assume I'll have to
> implement it myself.
> Is the implementation of IndexWriter.updateDocument itself a good starting
> point?
>
> Does anybody have suggestions on how to go about it? Or is it there in some
> other shape or form?
> Or is it absolutely discouraged?
>
> Thanks,
> Pablo
>
> [1]
> http://lucene.apache.org/java/3_0_2/api/core/org/apache/lucene/document/class-use/Document.html
>
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