Mailing List Archive

Hello,

First of all, the machine from which you sent this email has the date
set incorrectly - it thinks it's 22. 6. 2000.

--- amitb@sansuisoftware.com wrote:

> I had searched the archive of this list for getting more info on "How
> to delete a document from the lucene index".
> But most of the postings talk about IndexReader.delete(docNum). When
> we tried to delete a single document entry from the index , what we
> found is : the whole index got deleted.

You must be doing something wrong. Send the relevant piece of code.

> 1) Can anyone help us on how we can handle this ?

http://www.jguru.com/faq/view.jsp?EID=492423


public int delete(final String fieldName, final String fieldValue)
throws IOException
{
final IndexReader reader = IndexReader.open(mIndexDir);
final int deleteCount = reader.delete(new Term(fieldName,
fieldValue));
reader.close();
return deleteCount;
}

> 2) When the search results will reflect that, the particular document
> which I had deleted ,is not there ?
> Do I need to "optimize" the index for this ?

You don't need to optimize the index, but I believe you need to close
the IndexReader and re-open IndexSearcher when you detect that the
index has changed.

> 3) After adding few more documents to an existing index, what effect
> will it have on search , if I don't optimize
> the index immediately ? Will these new documents will be searchable
> before optimization ?

Yes.

Otis


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