Dev Guys

  Apologies Please....

    How Do I DELETE  an  Indexed Document from a MERGED Index File
  
   Can Some body Write me some Code Snippets on this... please

With Regards
Karthik

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Hello Karthik,

Here is the answer: http://www.jguru.com/faq/view.jsp?EID=492423

Otis

--- Karthik N S <[EMAIL PROTECTED]> wrote:
>
>
>   Dev Guys
>
>   Apologies Please....
>
>     How Do I DELETE  an  Indexed Document from a MERGED Index File
>    
>    Can Some body Write me some Code Snippets on this... please
>
> With Regards
> Karthik
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
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Hi

   Otis

   The  link u have specified  displays on how to update an Indexed File [
Deleting the Old  and then updating with new Ones']

  But My Question to be more Specific is : -

              When we MERGED more then 2 Indexed files  [using
writer.addIndexes(luceneDirs)] , In such  a case How to
               Delete one of the Indexed files from the MERGED Index in
order to Insert  an new updated one

  Please have some sample code snippet in this regard......
with regards
Karthik

-----Original Message-----
From: Otis Gospodnetic [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 22, 2004 12:52 PM
To: Lucene Users List
Subject: Re: Delete Indexed from Merged Document
Hello Karthik,

Here is the answer: http://www.jguru.com/faq/view.jsp?EID=492423

Otis

--- Karthik N S <[EMAIL PROTECTED]> wrote:
>
>
>   Dev Guys
>
>   Apologies Please....
>
>     How Do I DELETE  an  Indexed Document from a MERGED Index File
>
>    Can Some body Write me some Code Snippets on this... please
>
> With Regards
> Karthik
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
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Guys

   Has Somebody out there tried DELETING/UPDATION  of   INDEXED Files from a
MERGED Index Format,
  If HowTo do this Please Explain....
with regards
Karthik
-----Original Message-----
From: Karthik N S [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 23, 2004 9:24 AM
To: Lucene Users List
Subject: RE: Delete Indexed from Merged Document
Hi

   Otis

   The  link u have specified  displays on how to update an Indexed File [
Deleting the Old  and then updating with new Ones']

  But My Question to be more Specific is : -

              When we MERGED more then 2 Indexed files  [using
writer.addIndexes(luceneDirs)] , In such  a case How to
               Delete one of the Indexed files from the MERGED Index in
order to Insert  an new updated one

  Please have some sample code snippet in this regard......
with regards
Karthik

-----Original Message-----
From: Otis Gospodnetic [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 22, 2004 12:52 PM
To: Lucene Users List
Subject: Re: Delete Indexed from Merged Document
Hello Karthik,

Here is the answer: http://www.jguru.com/faq/view.jsp?EID=492423

Otis

--- Karthik N S <[EMAIL PROTECTED]> wrote:
>
>
>   Dev Guys
>
>   Apologies Please....
>
>     How Do I DELETE  an  Indexed Document from a MERGED Index File
>
>    Can Some body Write me some Code Snippets on this... please
>
> With Regards
> Karthik
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
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Hi
Mr Wolf  What is this

    // remove the document from index
int docID = hits.id(0);

 and can I increment the "0" factor  in the bracket ...for deletion
Thx in advance

Karthik

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 23, 2004 5:33 PM
To: [EMAIL PROTECTED]
Subject: AW: Delete Indexed from Merged Document
Hello,
> Karthik N S [mailto:[EMAIL PROTECTED]]
>
>    Has Somebody out there tried DELETING/UPDATION  of
> INDEXED Files from a
> MERGED Index Format,
>   If HowTo do this Please Explain....
Of course you can delete or update a document from a merged index.
It works in the same way as for all other indexes. You need an
unique key (e.g. the file name or uri), which is indexed
for searching, to find the right document, because the internal
document numbers are changed after merging indexes or deleting
documents and optimizing an index. Using this key you can search
for the document and remove it. It doesn't matter if your index
was created by merging serveral indexes or not.
Example:
/* Create index: */
Document document = new Document();
document.add(Field.Keyword("filename", file_name)); // this must be
unique for each document!
document.add(Field.Text("content", file_content));
writer.addDocument(document);
/* ... */
      writer.close();

/* Update or remove document: Use the file name to find the original
   document and remove it from index */
  FSDirectory indexDirectory = FSDirectory.getDirectory("indexPath", false);
  IndexReader indexReader = IndexReader.open(indexDirectory);
  IndexSearcher indexSearcher = new IndexSearcher(indexReader);
  // create query and search for document using its filename
  TermQuery query = new TermQuery(new Term("filename", file_name));
  Hits hits = indexSearcher.search(query);
  if ( hits.length() > 0 ) {
      // remove the document from index
int docID = hits.id(0);
      indexReader.delete( docID );
  }
  // else: this is a new file or already removed, so we can simply add it.
  indexSearcher.close();
  indexReader.close();
  indexDirectory.close();
  // now open an IndexWriter for the same index and add the updated file
  // as new document....
/* done */
Hope it helps. Regards,
Wolf-Dietrich Materna

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 Hello

 Mr  Wolf-Dietrich Materna

 Apologies on delay reply.

 I would like to have more of u' Help in this matter,
 Let me Explain the Setup I am Using in here...

1) I have "X" number of Unique Folders Which have around 50,000 Unique named
HTML Files.
2) The Indexing Field factor for each File in each folder is done on basis
of

  A)Name of File,
  B)Last modified Date
  C)Content of the file
  D)Folder in which the File is avaliable.
 At the end of the Week, Every Unique Indivigual Folder is Indexed
Indivigually in seperate folder.
 And at the end of Month These Unique Indexed Folders are  Merged  into one
file.
  So in any case If Iwant to Update the Existing Merged Folder,I have to
first delete from the Merged index
  on the basis of  Field type ( D as mentioned above) factor which is the
Unique Folder name,

  So u mean to say if I Delete from merged Index on the basis of  D, and
researching  of the Merged Index for the same
,the hits should return me 0 hits.
  Please advise me in this regard if I am not correct....

Thx in advance
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 23, 2004 6:41 PM
To: [EMAIL PROTECTED]
Subject: AW: Delete Indexed from Merged Document
Hello,
> Karthik N S [mailto:[EMAIL PROTECTED]] wrote:
> Hi
> Mr Wolf
Wolf-Dietrich is my first name, so leave out Mr. or use
my family name (which is uncommon here).

> What is this
>
>     // remove the document from index
> int docID = hits.id(0);
>
>  and can I increment the "0" factor  in the bracket ...for deletion
Yes, but there is no reason to do this in this case.
You search for documents using their file name (including their full path!).
You get a result (some kind of list). Please read Java-Docs about Hits
class.
hits.id(0) returns the (internal) ID of the first hit in your result.
This is the document that you want to remove (using
indexReader.delete(...).).
There are no more documents in your result "hits" unless your key is not
unique.
hits.length() returns 0 or 1.
Regards,
Wolf-Dietrich Materna

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